5 Reasons Why you SHOULD NOT Carb your LS Swapped 5.3, 4.8 or 6.0 LS1 LM7 LQ4 Engine | Carb LS Swap|

[@SRGGamers]

honestly not trying to be a dick here but engine masters and Richard holdner have done intense dyno testing and found the carb makes the same power as EFI and in some case a lot more. throttle response is exactly the same. the only 1 up EFI has is being able to start it up instantly in winter. asides from that there is literally no downsides of going carbed.

[@NightWrencher]

Its funny because I read you comment in the morning when I was groggy and I just read it again to respond to you but now it reads different. You are right, and thats usually who I site when I'm talking about carb LSs. From an NA performance stand point, carb is def the way to go.

[@trillrifaxegrindor4411]

fuel consumption,tuning for every weather condition,carbs only win above 4500 rpm everywere else they are worse tbh

[@keithbusch4014]

@@trillrifaxegrindor4411 stfu you don't know what your doing.

[@wraithmedaberry5795]

Rev limiter is cool

[@SRGGamers]

@@wraithmedaberry5795 Rev limiters are there for people who don't know their engine. 2ndly literally no power band @ valve float no reason for it.

[@thatruthhurts1670]

Carbs work you just need to know what your doing

[@NightWrencher]

No one says they don't work, but for an LS sometimes the extra hassle of learning a new fueling method isnt worth the extra cost to some people. Just throwing it out there for the people who arnt sure.

[@frankdatank7751]

I agree if anything its the best combination, no distributor to mess with.

[@darrinwatts9229]

Accelerator pump arm is giving it to much fuel. Easy fix in the world. But if you know what you are doing it's easy. Guess you need to learn more

[@NightWrencher]

@@darrinwatts9229 100% wrong. Its a lean stumble. The fix was a 38 squirter and a high flow screw. I also threw in a 50cc accel pump just for a little extra fuel. LSs like to go lean because they breath a ton at low RPM in stock form

[@NightWrencher]

@Tyler Spindler You'll need it to run your 8 coils. Compared to a stock 4.8, 5.3 and 6.0 with a tune, the carb will always have more power potential, but less MPG every time.

[@jmorides7267]

I have a whole lot more reasons why I wouldn’t run fuel injection

[@NightWrencher]

Thats for another video :)

[@infamousnova]

I'd like to hear that

[@wikto8145]

Don’t worry, I can’t afford fuel injection either

[@Gator12]

I’m running a carb swap 5.3 and have no issues

[@trillrifaxegrindor4411]

@Morning star Garage a carb on an ls doesnt look old school,it looks like an abomination

[@deestaple7000]

Sounds like your just inexperienced when it comes to carburetors

[@NightWrencher]

That could be it too!

[@adamsims6270]

I respectfully disagree. I've found that the LS, due to its excellent head designs, responds well to carburetion. Even with single plane intakes and "radical" camshaft profiles the LS engine responds with good drivability and economy in carbed setups. EFI is nice, but not necessary to get a LS swap off the ground. Thanks for the Video.

[@NightWrencher]

Yes exactly. You have all valid points. The issue is that there is a much higher expense to go from a stock ls to go carbed. The next big thing is that the stock intakes for the EFI perform just as good if not better than both single plane and dual plane intakes. I love my carb set up. There is a peculiar exhaust tone when running a carb and I really like that!

[@joshuahall8268]

When you have a junk carburetor. And start swaping out parts from other old junk carbs. You can expect junk results.

[@NightWrencher]

I know you're speaking in general, but I've been able to buy tons of "junk" carbs for cheap and have either used them for parts or managed to do a good rebuild on them and so far every carb I've worked on has run great minus an alcohol carb I tried to convert back to gas but the booster entry is too big so it was running way too rich

[@KR-mg3jz]

I give my Edelbrock 1406 two pumps on the gas peddle and it cold starts every time. Carbs are reliable as long as you know what you are doing.

[@jvasquez4353able]

Well don’t forget everything else you need if you don’t have it already for fuel injection. Fuel pump, fuel lines,intake,wiring harness,computer, etc. so for some it may be more expensive. Tuning fuel injection is 400 plus.

[@shitbox7413]

I’ve had 3 different carbed LS engines and they all worked great, other than hood clearance I’ve never experienced any of the problems you described. Check out my carbed 5.3 cold start video. 👍🏻

[@NightWrencher]

Will do!

[@popdog75]

Ive been running a carbed ls1 in my patrol for years! Daily driven and she fires up fine and runs perfectly! Never had a day's trouble with it!

[@scottm7341]

I like your vids and that Daytona Sensors ignition system. One drawback to ditching the whole efi is transmission control. It's another $500-800 for a dedicated controller. But a drawback to keeping the whole efi is tuning it - either sending it somewhere or buying a tuning setup and spending the rest of your life trying to learn it.

[@NightWrencher]

It depends on where you want to spend your money for sure but you still have solid transmission options with a carb

[@ryanbennett7106]

Carb is the way to go my man

[@NightWrencher]

It is for me :)

[@ericflamenco7672]

Thank you brother

[@ericflamenco7672]

Thank you brother

[@ericflamenco7672]

Thank you brother

[@greasemonkey258]

I mean no disrespect by this, but you need to learn how to adjust and really understand a carburetor... I don't want people being scared off from carbs. You can actually save money on your swap with the carburetor because you don't have to buy a complete engine, you have to buy a complete engine running fuel injection otherwise the miscellaneous fuel system pieces will nickel and dime you to death. You can save money because all you need really is a long block. Get yourself an Edelbrock carb... For an all-out race application Holly is hands-down the best choice but for a street rod or cruiser you can't beat an Edelbrock, get a good carb and a vacuum gauge and fine-tune that thing, do some research and try to really understand how to perfectly tune it, especially your secondaries I can't stress that enough. People change their minds all the time and go with fuel injection even after they've converted their LS to carb and you can pick that stuff up on eBay for cheap, you can get dual-plane intake and the MSD ignition controller for half of the retail in perfect condition. On another note be sure to get the MSD ignition controller not the Edelbrock, the MSD ignition controller is actually usable for tuning. In my opinion a 5.3 with an Edelbrock dual-plane intake and an Edelbrock 750 performer is a magical combination. Again I mean no disrespect and I wish you the best of luck with your project.

[@NightWrencher]

None taken. Im pretty aware of what it takes to make a carb run well. Ive messed with my holley so much and Ive finally got it dialed in. My engine doesnt like the AFR too much above 13:1. I don't use vacuum to tune, its all done on a wideband. I understand where you are coming from, I bought my engine complete, harness, ecu, fuse box, everything for $300 at the junkyard and I still went and spent $1000 more on a carb setup on top of that. The point of my video was if you want a good reliable stocker, stay stock, its cheaper and easier. If you wanna modify, thats a whole other story.

[@greasemonkey258]

I understand where you're coming from, sadly where I live a complete 5.3 with less than 80k miles is no less than $800. I bought used and a long block with less than 50k and I'm at about $700 running like a champ. However my carb did take some time to fine tune, and I'm running stock with springs and 220/224 cam. My post was directed at people getting into carbing an LS, to carb one of these engines you really need to understand a carburetor and how they work. That's why I made sure to let you know I meant no disrespect to you and that I wasn't meaning that YOU didn't know how to tune a carb but that someone just getting into carburetors need to really do their homework. I've watched your progress in your build and in my opinion you're doing just fine 👍

[@NightWrencher]

I totally get it, thank you!

[@anthonygomez0331]

Best damn reply

[@morganpowell2999]

To be fair, I feel like the guys putting carbs on LS’s are the type of guys that know their way around carburetors.

[@NightWrencher]

You would think that but its usually not 😂 I get so many questions in my other carb LS videos, its crazy

[@ecannon649]

I bracket race my junk yard 6.0 in a 67 Chevelle. I would have went with fuel injection but carbs are much more consistent. I put thousands of miles on and hundreds of passes for the last three years. I drive it 56 miles one way, race all day and drive back home it is very reliable, we race about 25 weekends a year, never ever stranded us It has a Edelbrock AVS2 that gets 20+ mpg with a 350 turbo and 3:50 gears and runs High 12's.@3800lbs. My car is a poster child for why carbs are great for LS swaps.

[@NightWrencher]

Exactly, i put my 4.8 together and tuned it last week. I made several passes back to back without having to touch anything 👍 its slow off the line but thats not the engines fault, its the driver

[@augustoescobar50]

Crazy part is carburetors have been around since the first gas engine and were I production all the way into the late 80s and all of the world ran them even in negative degree weather and still got to work on time. Yet electronic fuel injection has been around all this time and it still has issues as well. I daily drove carbed cars everyday and never had a problem with the carb. Like everyone else is saying on here...if you know carburetors, they are awesome, easy, cheap, AND reliable.

[@NightWrencher]

The sketchiest part of a carbureted LS swap has been the ignition boxes. I've had 2 boxes go out in the last 2 years after almost 20k miles. Recently switched to the Smart Spark LS so we will see how long that one lasts

[@augustoescobar50]

@@NightWrencher I've heard the boxes go out. I really want to try a carbed ls but worried about the box taking a crap...

[@NightWrencher]

Yeah I get it, me too. If I had known about the QC issues with the MSD boxes I would have picked up the SSLS box instead. Its almost $100 more expensive but so far it runs really well. I'm going to make a how to carb your LS video for 2021 soon. Ive got one for 2019 and 2020 but this year there's gonna be a lot of changes.

[@savagenomore]

I grew up tuning carbs and don't know much about injection and all the tech tuning and such but I decided to try it out and got suckered into buying some $1400.00 custom harness and pcm from a guy in texas who is no longer doing it (so what happens when something goes wrong with that setup) and have yet to use it because I just spent a little over half of that ($800.00) to use a carb on my ls engine, people talk trash about guys putting a carb on an ls until they get gapped by one😂

[@johnkirby6216]

I used twoto have efi on my car it got 20 mpg with a carburetor get 28 to 30 mpg

[@trillrifaxegrindor4411]

i dont think so

[@royhkusp1]

@@trillrifaxegrindor4411 What's he running a one barrel carb?😁

[@johnkirby6216]

And with my Electric choke it starts no problem in the cold weather I am in Canada

[@x2tb]

Yeah; it's not like back in the 60s you couldn't drive a car in Alberta.

[@mayuravirus6134]

Me who always tinker and play with any type of carb: I would do that in a heart beat

[@NightWrencher]

I had never really worked on carburetors until I carb swapped my LS lol

[@DieselDoktor]

AC Delco injectors for an LQ4 as of today on rock auto… $188/ea… $1504 for a set of six. Lol carb set up is looking sweeter every day. 😂

[@NightWrencher]

Just pocket them at the junkyard, what do you mean? 🤣 jk, I have a video you might like coming out tomorrow at 9am PST. 👍

[@cerescorubi]

Looking at that bench I think you should stay with the carburetor

[@NightWrencher]

Aint that the truth 😂

[@TheMrDarius]

I’ve been reading a lot of comments on how people don’t have issues with carbs. But I also noticed in your video that you’re very thorough about what you may POTENTIALLY experience and give those who have little to no knowledge on how to do it properly a little insight. I found this very educational.

[@NightWrencher]

Thank you! That was exactly the point of the video 👍

[@youtubeisbroken241]

Why would anyone downgrade their engine? Efi is the way to go. More power, easier to tune, more power, better mpg, more power

[@NightWrencher]

Well its a misconception that EFI makes more power than a carb. Short answer is yes, because too many people mismatch or don't tune the carbs to their specific engine. Longer answer is they make the same or more power because of whats called charge cooling due to the fuel cooling the air mixture as its flowing down the runner. Watch Richard Holdener, he runs a lot of dyno engines and most of his NA builds use a carb. Cheers.

[@youtubeisbroken241]

NightWrencher I might have spoken out of ignorance. Efi is crazy expensive, but it’s what all the record holders are running. I stayed up till 4 am last night and it looks like for 1/3 of the price you can make 80% of the power. And just as much power if you’re building a 400-500 whp street car for half the price. I’ve been researching the cheapest way to 5.3-5.7.... maybe 4.8 a fox body. Goal of 450 whp, streetable, under 5 grand. Shoe string budget. Efi breaks the budget. Carb makes it affordable

[@NightWrencher]

Carbs and efi make the same power when properly tuned. Believe me when I say that even top fuel dragsters didn't run fuel injection until recently, and even then, its not traditional fuel injection like you and I know. Check this out and get back to me kzbin.info/www/bejne/gH21koxppKZ-o8k

[@youtubeisbroken241]

NightWrencher pretty spot on video. I still feel efi is probably the best way to go (assuming you have the budget) but for the diy in the garage guy, yea, maybe carb is a better route

[@trillrifaxegrindor4411]

personal build examples? tell/show me what you have personally done and the result,not what you looked at on youtube

[@krankensteinrocks]

I had Dale Cubic at CFM Carburetion build me a custom 750 4150 carb spot on as received minor tuning was all it needed great drivability and neck snapping throttle response! not cheap but worth every dollar I paid for it! carb properly set up works great on LS engines

[@NightWrencher]

Exactly right. Carb manufacturers make universal carbs but in order to make them run perfect, you're gonna have to pay someone to get it dialed in for your specific engine or learn how to do it yourself

[@frankdatank7751]

Your testing different carbs from the 1960, the new holly quickfuels are on a different level,adjustable secondaries, glass sight fuel bowls,better castings. Plus tuning with out having to pay a tuner, you just need to know what your doing lol

[@NightWrencher]

Totally agree! Ill be posting a new video debating this video!

[@NightWrencher]

I have a new aluminum 750 vac sec chilling in a box, maybe Ill pull it out to do some testing!

[@frankdatank7751]

@@NightWrencher I have a 580hr quickfuel in my 5.3 97 ext cab sierra I tuned it perfectly, no bogs, starts on the first try, but it took me a long time to understand the 4150 holley. I bought two books on how to tune them. Its my daily driver, I've driven it for 25,000 miles , soon I will post another update video, im getting 340 miles to a 25 gallon tank.

[@Jay-fb2lv]

Use a mechanical secondary, not a vacuum.

[@Gator12]

Carbs are best. I can’t stand this computer b.s. But I grew up around K10’s, Camaro, Firebirds etc.... I installed a Carb on my LS and love it. The only thing most people don’t understand is you have to adjust the choke between seasons. Summer & Winter. Carbs are better because you done have to take it to the shop to have it tuned. You can do everything right from your garage

[@NightWrencher]

I hate electronic chokes lol. All my cars run a manual choke and I never have issue starting them up hot or cold. I just love playing with carbs and tweaking them as much as I can.

[@Gator12]

I feel the exact same way.

[@popatop6657]

You are right about 1 thing and that is fuel mileage, The rest you are inexperienced on. A carb is MUCH simpler MUCH and also more dependable, A carb setup is also les money when starting from scratch.

[@carllattimore8227]

Once its tuned all you need to do is to ensure its clean and use the choke when its cold. Aside from that its going to be just as reliable. As far as the fuel economy, the fuel injection will be a little better if you are pinching pennies. Additionally once anything electronic fails, its a done deal. You will need new parts. A carb is a purely mechanical device. Unless you beat on it with a hammer, most issues can be fixed without replacing the carb.

[@NightWrencher]

You make several good points, here a huge issue that I've experienced specifically with a carbureted LS. The MSD box is the weak point of the system. In the last 10k miles Ive had to replace the MSD box twice. Standard OEM stuff is good for 100k+ miles. I'll be switching to the Smart Spark LS system soon so hopefully my main concern will be taken care of 👍

[@trillrifaxegrindor4411]

@@NightWrencher get it as far away from heat as humanly possible

[@jackiemason488]

The 6014 is easily tuned, ive for a carbed 6.0 running high 11s in the quarter with a stock bottom end, with custom cam and 706 heads. Throttle responds is very quick, and I get decent gas mileage. Only thing I agree with is the expense.

[@NightWrencher]

I think you gotta be dedicated to be able to run a carb now a days. So few people are running carbs in LSs that if you need personal help, youll pretty much only get it online which isnt always as helpful. A lot of people get the carb set ups only to sell them again on offerup because they couldnt get it to run right. If youre dedicated and open to learn, Its an awesome setup, if not, youre gonna have a real bad time.

[@liveandletlive2894]

What expense?

[@NightWrencher]

Typically carb swaps cost over twice as much as regular EFI swaps because the EFI stuff is free when you buy the engine usually

[@jovanitorres8128]

You're right I screwed up on my LS don't know why but my engine does not want to turn off or accelerate with the wires disconnected

[@henrypastor8691]

I had a carb lsx 5.3 I drove to Orlando from Miami an back the same day an never had an issue

[@NightWrencher]

Ive got 15k miles on mine and aside from dead MSD boxes I havnt had any issues

[@TheNightrunner666]

Hey I wanna do the same with a 5.3. I'm weighting options. What went into the carb swap?

[@NightWrencher]

@@TheNightrunner666 kzbin.info/www/bejne/l2ebaaOklNiYi9E

[@Travis7109]

It kinda just sounds like your opinion is that you aren’t a big fan of dealing with carbureted vehicles. Which is fine. It just doesn’t mean the idea or practice of doing the carb swap is a bad idea

[@NightWrencher]

It is if you dont like tinkering with carbs. 😂 in all seriousness. I deal with people like that all the time. They buy the whole thing, set the idle and then get mad because it doesnt run right out of the box 🤷‍♂️ all my cars run carbs but its a bigger deal than one might think

[@macblack11]

All we run is a carburetor on our LS derby car engines, works great

[@NightWrencher]

Thats great to hear!

[@billzussman5277]

Another carbed LS owner, works great.

[@monahumada7535]

When you said that they can flood out and not start, did you mean like any older carb ran engine? Or the LS is more finicky? Is this where I should feel old because as a kid I had trucks and blazers that needed a specific amount of pumps before I turned the key in order to get them to start without flooding when they had manual fuel pumps?

[@NightWrencher]

Well yes, while Im out and about in my truck, Ive gotta keep in mind how long Ive had the engine off for. Early morning takes 2 pumps. If i do 3 itll flood. After Ive driven it to operating temp I have about 10-15mins to turn it off and turn it back on with no pumps or problems. After 15 mins I have to hold the throttle at half and crank because the fuel in the bowls evaporated and now the carb is full of fuel vapor. The LS will always start, you just need to learn how it likes to be started.

[@sylumgand]

The 1968 Dodge 383 in my Dakota fires up faster than the modern vehicles I interact with daily, including in the cold. NE Ohio plenty of 10F(-12C) days starting under my belt. Starts fine, warming up takes forever. But that's a symptom of a big block in cold weather. EFI is just more efficient starting up and leveling off since it richens and leans god knows how many times a second. You also NEED a spacer between the intake and carb or you'll fight vapor lock all the time. Modern gas boils at a lower temp these days. Ask me how I know lol.

[@NightWrencher]

Lol I have a 2 inch spacer on my LS and a 1 inch spacer on our 318 duster, 383 charger and 360 w200

[@jackperry9369]

Sweet love your stuff appreciate it young man ......I subbed keep em coming eating up this info 👍

[@NightWrencher]

Theres a lot more to come no worries! Thank you!

[@roamsalone4020]

Maybe I missed it in the video but with carburetors size very much matters. I had a customer recently who has an early 3rd Gen Firebird with a 350 swap and aftermarket carb. It ran like poo so he brought it to me and within about 30 seconds I saw the problem, an 800+ cfm carb on a mildly warmed over 350. He insisted that was not the issue blah blah blah and finally I said well let's try one of mine and see what's what. And with a 600cfm deal and after cleaning up his plugs the engine was running far better with AFR'S having stated at 9.8:1 and going to 12.1:1 while st idle. A few jet swaps and a little timing and it's a whole new car. Point is there's way more to carbs than just turning the mix screws. So go back , see what you've got vs what that engine needs, and don't use those timing pills for anything other than fire up

[@garysgarage.2841]

I would agree going carbed is more money and going fuel injection is more reliable. Performance both tuned properly there's really no difference. A carb will go dry sitting it's just the nature of the best but an electric fuel pump will help with that and you do need to change your oil more often with a carb. When I started there was no fuel injection except for some rare vehicles you learned how to tune and an o2 sensor is a huge help tuning your primary and secondary side and when done it's very reliable for drivability. But in the end I'd go injection it's just way easier it self tunes.

[@garysgarage.2841]

@@SOLDOZER I'm having a hard time believing it's the dumbest thing you've ever heard. Do you actually listen to the words that come out of your mouth?

[@texasstreettunes1310]

Going for performance, fuel economy doesn’t matter and aftermarket intakes/TB/injector for EFI can easily cost tons more then a carb setup and the carb setup will always make more power, from a performance stand point carb all the way for a daily its not worth it unless you really like the noise cause it sounds great. As well as tuning can be just as frustrating when you start making power even EFI has to go speed density which just like a carb it changes with various conditions probably even more then carb because it includes load changes as well.

[@NightWrencher]

They both have their purpose. Carbs are much more difficult to tune on a wide range of conditions but if you can dial it in, you'll have bulletproof setup.

[@texasstreettunes1310]

@@NightWrencher yes sir, but my favorite part about carbs NO INTERCOOLER, but i do hear the EFI sequential tuning is very very nice but once again more costly.

[@NightWrencher]

It wouldnt hurt to add one on a street car though 👍

[@jeremycaswell5105]

Summit racing has an LS carb swap kit that comes with the MSD ignition controller and the intake for $800 would just need to get the carb

[@NightWrencher]

So $1000 total right?

[@Michael-sb7ye]

Have a buddy with a carb ls he has no problems I’m doing a gen 3 hemi carb myself

[@NightWrencher]

I actually don't regret my decision to go carb either. I'm more of a hands on guy that likes to learn a little bit of everything. I noticed that a lot of people that I would talk to about my swap, didn't quite understand what would be involved to get it done, so I made this video to help people make an informed decision before they jump into anything.

[@Michael-sb7ye]

Nice and yeah with carb it’s less bs and wires to makes it look cleaner as well

[@NightWrencher]

Definatly agree with that

[@deestaple7000]

Your opinion on what’s working for you.. Carb ls unlock all power no computer govs

[@NightWrencher]

It depends on your intended application. If you plan to stay stock, stick with fuel injection. If you plan to make a lot of mods at different times, go carburated. If you plan to go turbo, stick with fuel injection. If you plan to go all motor go carb stock LS computers put you at 250whp and a tune can get you closer to 300 with an exhaust, and thats cheaper than a carb swap.

[@mayuravirus6134]

@@NightWrencher I'll say carbureted turbo would be cool

[@NightWrencher]

@@mayuravirus6134 turbo carb is cool and fairly easy, but you need a blow through style carb and also AFRs are less consistant on a carb application so for turbos specifically I would stick with EFI because 1 lean cylinder could wreck your engine.

[@trillrifaxegrindor4411]

@@mayuravirus6134 tricky,hard to tune,random issues

[@scottesguerra5301]

Carbs to ls is like chocolate to peanut butter. They work!!

[@NightWrencher]

They take a little bit to get going, but they do indeed work!

[@scottesguerra5301]

I pulled my old small block dropped the carbed 5.3. Same day. All out the box stuff. Junk yard motor. 3.73 gears th350. Got over 15k on it gettiing 14mph and a solid 300hp😃

[@NightWrencher]

@@scottesguerra5301 not bad! Ill be dynoing mine pretty soon to get some good numbers. What carb are you using?

[@ronniemctaggart8722]

The 5.3 is legal in dirt racing now and they say they are badass little motors

[@NightWrencher]

Thats pretty crazy! Yeah I can imagine they would tear it up

[@limabravo6065]

Edelbrock carbs run better on the street... there I said it, I’ve had a 600 cfm carb on my 5.3 LS swapped IROC now I bought the 6ls controller and intake used but it runs great and with the 700r4 I get about 22mpg on the highway. Yes efi makes things more convenient so far as cold starts etc... but if you know what your doing a carbed LS (or any engine) will run just fine.

[@Necrocom4]

Do you think a 500cfm could run the ls fine? I love the Edelbrock asv2 I have and I'm thinking about an ls swap for the car and I want to keep the carb.

[@limabravo6065]

DiscardedZombie / A 500 cfm will work on a stock 4.8/5.3 but if you want to get into say a bigger cam or heads then I’d suggest a 750, because you have to remember what makes the ls so powerful, aka their heads and how much air they can flow. A stock ls head is the equivalent of a nice set of aftermarket sbc heads, and the more air an engine can ingest the more fuel it needs

[@NightWrencher]

Rule of thumb is put the smallest carb you can run before is starts to lose power. Even with a mild cam, a 650 should be enough. I haven't gone as small as a 500, but I have run a 600 with no issues.

[@hksjoshua]

I plan on running a dual seat and needle 4150 carb on a l33

[@NightWrencher]

Nice, like a 650?

[@mattmadison4731]

This video was good for a laugh not sure if the guy was trying to make a joke video or if he just doesn't know the truth of carburetor

[@infamousnova]

Ok I'd like to know what you think, here are my answers to your reasons. Which way would you go? 1. Already got a manifold for $500 with msd 6014 new 2. I dont care about gas mileage, I just want to go fast 3. Tune thru msd lol 4. I hate when it doesnt start lol, I'm in Southern California. I'll go thru CSU this time 5. Not worried about space as I have a cowl hood

[@NightWrencher]

If you already got everything then just do it lol. I found a good solution to vaporlock is installing a 1 inch plastic/phenolic spacer in between the carb and intake really helps keeps fuel temp down after it shuts down.

[@infamousnova]

@@NightWrencher ok I'll apply that. I dont have the carb yet tho. So I was considering the sniper unit but I'll go carb instead

[@NightWrencher]

@@infamousnova If you already have everything else, its cheaper to go carb first. Carbs are super cheap second hand. Holleys are super easy to rebuid but if youre gonna buy brand new, a edelbrock 600 is a good choice for a stock engine

[@infamousnova]

@@NightWrencher im gonna go fuel injected. My super victor intake and Msd box is for sale. Both brand new

[@NightWrencher]

@@infamousnova i think thats a good move too! Its really hard to beat stock EFI.

[@gt90guy]

So how did those “shims” work on that unibody XJ? Yep, unibody, which means there is not a frame. The only way to change the placement of an LS in an XJ is to change your mounts for the engine.

[@internallycombusted1]

It is more expensive then stock efi, but I got an intake and the msd for 350 bucks slightly used and gonna reuse the good carb i already have. For me it makes sense to use a carb, throttle response tends to be better with a carb

[@horsefly1020]

By time you buy a stand alone harness, bigger injectors, a way to tune it like hp tuners. Your not saving anything over a carb setup.

[@chazjewett-mcmillen5900]

It’s called get the conversion kit, it’s only around 700

[@NightWrencher]

Its called the conversion kit, plus the electric fuel pump, plus the fuel pressure regulator, plus the wideband. Versus having a stock pcm tuned for a few hundred bucks

[@cusick420]

title should read 5 reasons why i shouldn't have carbed my ls

[@anthonypesqueira7540]

Anyone that knows carbs knows for sure that the LS will make more power when it's tuned right. Tuning carbs isn't rocket science but some people just can't do it.

[@bryanfogle6672]

And carbs have been around how long???

[@Zelaznogsiul-63]

You can actually put a distributor and a carb on an Ls engine. No sensors to worry about and simplicity, price and know how is the key for something like that. I am planning in doing an Ls swap on my 90 c1500 and I will leave it fuel injection, but if parts like chip shortage and other components are not readily available that will put a stop to the project. But I agree fuel injection is way more reliable.

[@glennmanchester5696]

No distributor

[@jessehasch8493]

You can PUT a distributor on an ls. It's not hard. Not cheap either but it's doable

[@rosskrause3926]

I live in the country where they don't check emissions,just headlights,turn signals and brake lights..I was planning on getting a 98'-02' Camaro with the LS engine,then building another engine,installing it and running a carburetor..is that a problem with the stock wiring harness,sensors etc ? I know about carburetors and how to tune them.

[@NightWrencher]

Youll need to get the PCM tuned so that it only runs the coils and not the injectors or looks at the TPS. The harness will stay about same. Youll just need to push some wires out of the way.

[@8fouraizak967]

i have a 6.0 carbed that’ll outrun efi cars all day, it’s just in the tune i guess. there’s some finicking needed and such for a nice solid setup. personally, efi for eco, and carb for hotrodding and pissing competitions🤣. cheers

[@badss87-67]

I was totally against efi but after swapping my gbody efi I will never go back to ancient carbs!

[@NightWrencher]

It does tend to happen sometimes. unless they go sniper and 1 injector dies so you have to replace the whole unit. then its no fun after that.

[@bl300zx1]

Paying some to tune so it doesn't blow cost almost $1,000 by itself plus everything else to make it run.

[@nicknolan2152]

Should have run an edelbrock way easier to tune

[@trillrifaxegrindor4411]

and shittier,and makes less power

[@Mr.Frost181]

I'm getting my 350 ready for holly sniper EFI

[@THExCITYxSLEEPS]

Why didn't you just go with the sniper EFI

[@MASViper]

Do you think there's people out there who put carb intake on LS3 but then installed an EFI conversion like Terminator Stealth EFI so that you have the traditional, carburettor looks but EFI benefits?

[@NightWrencher]

Yeah, lol. Probably the worst thing you can do. The stock intakes produce power evenly everywhere and its cheap. Maybe for a show car itll work but for the average guy it doesnt make sense to go from free efi to $1500 efi

[@John-ze4qy]

I see plenty of those on the forums,if you dont go port EFI,IMO your just using a high tech TBI system,GM used 35 years ago If you want EFI or port,go with GM factory and learn to tune,just like we do with a carb

[@MASViper]

@@John-ze4qy What is a TBI system you're talking about? The only TBI I could find is Traumatic Brain Injury.

[@larryseals6089]

How much hp do you think you lose with a carb?

[@bcummins4702]

Where are the videos of the Cherokee swap????? That’s what I’m working on would and could use some info on the swap

[@NightWrencher]

Im waiting for my brother in law to send me the funds to start buying parts! He wants to keep is aw4 4wd trans so we will be using an adapter plate.

[@Mattstepanoski1995]

I have done methanol carby on burnout car I find it cheaper with tunes If your mates car has being tuned take there tune Quick fuel 850 methanol carb Valley plate and msd was expensive But wouldn’t go back efi Efi whole lot more expensive for tunes

[@theadamrhoads6143]

How much psi on ur gas

[@NightWrencher]

Im running 4psi on a return system.

[@williamopsahl8962]

that's one gangster fly lol

[@baddog9320]

Lower gas milage? Thats BS. 10 to 12 mpg is still 10 to 12 mpg. Now your foot in it is another story. But its going to go down either way. Fuel injection is not going to improve your mpg. Nor is carburetor going to lessen it. Go with a stock carb if you want better mpg. A quadajunk will get better mpg then a holley 850 double pumper. No question. But the holley will give you a lot better proforance then the stock fuel injection or carb. Compare apples to apples and oranges to oranges. The advantage of carb is getting rid if all that computer bs.

[@tempermentalw7269]

It's called old school the only way to learn

[@NightWrencher]

Far from the only way 😂 But yeah I know what you mean.

[@ronnieenglish8241]

How would you the 4l60e trans to shift .

[@NightWrencher]

You would either have to switch to the older 4l60/700r4 or get a module that would do it for you.

[@tylertucker4478]

Tell me you don't know carbs without telling me 😂

[@brandonparsons7321]

What are you using to control spark? I don’t have oem ecm, and want to build an LS for a project

[@NightWrencher]

Currently using the Smart Spark LS by daytona sensors 👍

[@NightWrencher]

Thanks Fil, I'm glad its working out for you. Thanks for being a long time sub 👍

[@NightWrencher]

Same here 👍

[@acadienunlimitedsubliinmx1969]

We almost gazz our self in the 79 camaro ,lower vent need to stay closed hahahaha

[@matttheriault5489]

So its a double pumper carb on a small block. Is it a stock 5.3? I would think running something a little less aggressive would help with the tuning, and the fuel mileage. I've never carb swapped an LS, just basing my thoughts on past experience with old carbureted pickups.

[@NightWrencher]

I agree, I've gotten the best results out of vacuum secondary carbs. Double pumpers are nice because you don't need to wait for the secondaries to ooen, but sometimes you dont need all of the throttle either.

[@matttheriault5489]

@@NightWrencher I dont have a ton of experience, but ive owned a bunch of old pickups. I replaced a couple stock double pumpers with an edelbrock 600, though, and the trucks came right to life. And I only did that back then because someone recommended it, telling me that a big carb like that was just too much, where the motor was basically stock. Would a big two barrel work?

[@NightWrencher]

A 500 2 barrel and a 500 4 barrel at two very differnt thing. A 4 barrel version of the 2 barrel would be 1000cfm and a 2 barrel version of the 4 barrel would be 250cfm. A small 4 barrel will always run way better than any 2 barrel because of fuel distribution. Vac sec. Carbs run better because you dont choke the engine with too much air all at once and produces more torque than the same size double pumper

[@matttheriault5489]

@@NightWrencher okay. I actually started looking into this because of a project I have. Its a 97 chevy 2500 with a 454, and I was hoping I'd be able to convert that to carbureted, but I've read that the first couple years of the vortec had their own set of issues, too.

[@rjayschoessler157]

Matt. The 750 double pumper will run fine on a 5.3. It’s all in the tune. You just gotta know what your doing. What you don’t want to do is run a smaller cfm carb on a motor. And if your going 454 I would go for a 1000 cfm and you’ll have lil wiggle room to do upgrades on a 454

[@franksplace9589]

I'd say all the above statements are not all the way true. I run EFI. but before EFI you had to learn to tune a carb. And I can say if you don't know what your doing with a carb. You will have the above issues. I have a 5.60 fox sbc that can start and run on any KY winter with only 3 pumps to get it started and walk away. EFI will 100% work easier to get you tuned and alot move fine fine tuning yet a perfectly tuned carb. Is only perfectly tuned on that day unless you ha e another day like it.

[@ericflamenco7672]

Hey man big fan I'm doing that swap on a cl5 1975 so not a good idea

[@NightWrencher]

Its a good idea if you really know what youre getting yourself into

[@jskillz12able]

Sound like you don’t know what your doing carb better don’t really have to worry about car catching fire

[@eddalton8530]

lol.. i think he needs more seat time with a carb.. they worked just fine with a choke in the winter for many decades

[@NightWrencher]

Lol Mine runs just fine in the winter with no choke. Idk what is it about most people but they cant seem to get their chokes set up to run correctly.

[@DRNEGOLICIS]

Carbs getting 2-4 better mpg you got that backwards

[@NightWrencher]

I dont think I understand. Are you saying carbs get better mpg than EFI?

[@marvinhindman1790]

4777 650 holley works great for this!

[@7REDDRACO7]

im using a quadrajet on my stock 5.3 for fuel economy. Performer RPM , comp cam, 180* fabbed headers, 1981 camaro TH350 3.00:1 posi 10 bolt. 4500 tight nitrous convertor. Still a work in progress wish iknew about wires and junk. going to swap in a big crank does anyone know if a stock 5.3 can fit a 4.250" with some minor grinding of block?

[@NightWrencher]

Quadrajet for mpg, but everything else is high performance lol. Is there a reason you arn't upgrading to a 6.0 block instead if youre going to build it up anyway?

[@7REDDRACO7]

@@NightWrencher Ilike the small bore size better

[@NightWrencher]

For an NA build I think the 6.0 is the way to go. Richard Holdener did a comparison with a 5.3 and 6.0 and found that hp and tq were directly affected by displacement and the 6.0 always made more power with the same mods. I know the 6.0s are more expensive, b7t if you're going to rework your 5.3 anyway it might be worth it, idk.

[@7REDDRACO7]

@@NightWrencher Yes thank you for the advice , and for everyone out there it is the best way to go. I just like the smaller bore size with a long stroke, however ijust found out ishould stick with only 4" stroke. to make a 383. its going to 3.905" bore and 4" stroke. thanks for the respond i'm learning alot from everyone, and ihaven't started the build yet, so icould end up with a 6.0L GEN IV. also anyone out there doing a 5.3, understand you need to rebuild that thing with GEN IV rods or your gen III rods are going to blow with any amount of cam and or compression. i'm looking at cams and want to use the summit high lift cam specs are 209/217 @ .050" and .550"/ .550" lift respectively. its a real stout tiny cam with alot of lift versus duration.

[@DailyELI5]

@@NightWrencher The quadrajet can deliver both performance and mpg, it uses metering rods and vacuum for the secondaries so it flows what it needs but cruises only on the primaries so delivers best of both worlds. Setup properly they are great.

[@Chris-bn1bn]

Why do you think that racers aren't dropping the gen 1 platform? Because it's not made to last 300,000 miles. Distributors & carbs aren't pieces of s***! We'd like to enjoy the benefits, without BS.

[@pmotorsports8276]

Up next week how to play VHS, or beta tapes in Blu-ray player

[@NightWrencher]

I just might ;)

[@kennethharms7503]

MSD MAKES A BOX WITH PILLS WITH DIFFERENT TUNE THERE IS MOD THAT YOU CAN ADD A HEI TO A LS LOL

[@NightWrencher]

Some race classes require a distributor so that does make sense. Probably not a good idea though

[@iramirez95020]

I rather plug my laptop, click up/down hit save and done :)

[@1957Chevytruckbuild]

Well i have an ls1 and don't have an i take. So priced both ways its cheaper going with a carb. 1000 bucks gets carb, intake, and 6014 msd. Just the efi is a grand and it goes up for fuel injection and computer and harness. Your facts are opinionated at best.

[@NightWrencher]

Yes and no. The truck intake makes more power than the LS1 intake and you can get those complete for cheap. If you wanna go fancy, you can go LS6 intake, ID1000 injectors, walbor 255, etc. But I was talking bear bones.

[@mattconner11]

But an xj is unibody

[@platano4924]

Sniper EFI!!!

[@scottesguerra5301]

Done 3 recently . 2 using 6014 with timing tweak Holley dual plane and Holley 600cfm street carb. Both run Awesome. Did one with single plane victor and edelbrock 750 and 6010 box #3 pill has off idle flat spot but RIPS!!!

[@NightWrencher]

Nice! Heres to hoping I get mine tweaked well enough.

[@scottesguerra5301]

Really no more than 34* timing ramp it up 13* off idle to rev limit. Working good so far.

[@NightWrencher]

@@scottesguerra5301 i havnt messed with the timing yet, but that is something to look into!

[@frankdatank7751]

That off idle could be the idle feed restrictors, thats what it was on mine, go 4 numbers up and see if it helps.

[@NightWrencher]

@@frankdatank7751 I wish you said this a month ago! Yes, this was actually what I needed!

[@kenparsons4132]

I mean I respect the opinion. But it's been proven time and time again that a carb can push more ponies to the wheels in a lot of cases lol.

[@NightWrencher]

I've seen the back to back runs on richard holdeners channel and a carb does have a marginal advantage up top but in an LS specifically, the stock intake designs are so good that none of the carb intakes can beat out the stock truck or TBSS intake numbers. But power production is only part of the puzzle. Driveability and mpg take a small hit as well so it all depends on what you want to use it for.

[@kenparsons4132]

@@NightWrencher oh without a doubt. I meant just in general with a lot of applications wasn't pointing LS specific. I have a 4.8 myself I plan to keep the stock truck intake because of that too so I know what you mean there haha. It's just interesting to see an old school set up out perform a lot of new stuff too. Some guys still make big power carb swapping an LS but I still agree the factory intakes are what's best on them. GM did a good job on them for sure.

[@Stoner-dk8ox]

@@kenparsons4132 it's all about what camshaft is in it lol if ur intake is set up to make all of its power from 2500-6000 then ur cam should have a power band range from2500-6000 so u can get the most power out of your ls and there's a better intake that makes more power then the stock one with a stock cam it's make by Holly they look similar one just says lsx and is gray and black

[@chadbbcmustang3319]

Well what do you expect, you're running and ancient carburetor and a small one at that. Get with the times and see all the new performances carbs available. Lol

[@NightWrencher]

My AFRs are spot on, so fuel delivery is not an issue. Going too big will cause me to lose torque in the lower RPMs which is no good for my truck if I want to tow with it. I would go with a slightly larger carb but change over to annular boosters and see where we are at after that. But next on my list is a cam!

[@chadbbcmustang3319]

@@NightWrencher all I'm saying is an LS engine loves a carburetor application. At least mine does anyway. Street or track it performs as well as any efi I've ever ran. Like stated before, if you know how to tune a carb, they are great. As with anything , newer carbs have more functionality and tuning advancements that a 1980 carb would have. Try a new one and and then do another video on that carb.

[@NightWrencher]

@@chadbbcmustang3319 I agree with you 100%. I have a 625 demon that flows more air than my 650. I might throw it on, tune it to my LS and make a few more runs to see the changes.

[@NightWrencher]

@@chadbbcmustang3319 I posted a Dyno run video if you havnt checked it out yet.

[@JRADMAKES]

Cleaning off your bench should be on your list of things to take care of… not watching anymore…

[@trillrifaxegrindor4411]

#1 fuel consumption........carbs atomize fuel but they use a LOT OF IT

[@mickgrimes9078]

my carb set up; used 750 holley, used edlebrock 7118, and microsquirt (Running spark only) was less than hp-tuners. (600$) carbs can achieve nearly the same mpg and power as fuel injection with tuning. (it is a lot harder than tuning a fuel map tho) i have daily driven tons of carbed trucks/cars in negative Michigan weather. never had a problem. when i was debating going fuel injection vs carbed, i saved money going to a carb set up. i even built a spread sheet lol

[@NightWrencher]

I played around with the idea of going microsquirt but going with an ignition box was only a little more and it could do more things so that what I ended up doing.

[@marcorivera8585]

No bueno carburetor.?

[@NightWrencher]

My carbs are good :) just pointing out common problems other people run into

[@hankpirrone1329]

My ls runs harder with the 830hp Holley smf the trick flow manifold than it ever did with the injection. Like the comment before me says you just have to know what you’re doing

[@jbkuztoms5329]

Where u find a intake for $200😂

[@NightWrencher]

Back in 2019 on offerup you could have found the whole swap for cheap XD