HAS HELL FROZEN OVER? EFI VS CARB DYNO TESTING! “Junk Yard Dog” 5.3LS ENGINE GIVEAWAY!

Alright, so everyone knows I’m not a LS engine fan, and most CERTAINLY NOT AN EXPERT! So I’m learning as I go here, so you all can learn along with me! If you already know, YOU can teach me!
One way or the other, this may be a video series that breaks the internet.
I’ve officially entered the LS WORLD! (Reluctantly I might add)
Bob has wanted to start testing and learning EFI and LS Engine Combinations.
Thanks to Fuel Tech, and an abandoned 5.3 that was headed to the junk yard for a core, we have a new video series to share with you all that I think will help ALOT OF PEOPLE!
When we get done testing this little 5.3, we plan to GIVE IT AWAY AT THE END OF FEBRUARY!
Watch the video and see if “The Old Man” can learn a new engine, and tune a carburetor FOR REAL!

[@franker1111]

That's awesome that you're showing this because it explains the difference right there. Good job Bill 👏

[@lonewolf744]

It's so cool seeing Bob much more comfortable on camera now. I remember at first (like most people) didn't really want to be on camera. I love watching Bob and listening to his knowledge ect.

[@NonTypicalRacing]

Well said, ditto everything.

[@susanhill750]

Bob has made u guys a great great edition to ur racing crew. Bob is the man.

[@johnsmith7676]

Thanks for keeping it low-key, not having any ridiculous music, or obnoxious intros. MUCH appreciated. Think I'll stick around.

[@michaelgalli8269]

Uncle Bob is looking at lot happier than ever you have changed his life that's all 😊😊

[@stevemino142]

In terms of tunability and simplicity carburetors are hard to beat... good video

[@garyclarke2385]

You learn something from each day with the old man and Bob working together, the knowledge between the two is accumulated over decades of hard work.. You learn about patience, frustration, solving engine issues and so much more besides just working on cars... This is a very good reason to watch but more importantly in Bill's case his family just shows the work ethics passed down to Billy & Tommy and the multiple people who haven't been shown, Bill helps people because he can , IT'S JUST THAT SIMPLE..🙏🇺🇲🇺🇲OMG🇮🇪🇮🇪🙏

[@brett6577]

these videos with bob are great and very info packed would love if you could get bob in front of the camera a lil more while hes messing around in his shop fixing hings for you it ould make for great content and be educational you dont have to be there he can film himself explaining what and why hes doing what hes doing

[@rayrussell6064]

Even a old dog like myself can learn something, thanks for sharing Bill,uncle Bob, and Ryan. God bless and as always be safe.

[@todd8109]

Bill thanks for the great information you guys shared with us. You have a great bunch of friends and and family. You have been blessed with this great gift that you share with all of us. Thanks again

[@Dutch-wg6pr]

Very well said, thank you

[@ThatBlack6.7]

I've helped out so many people over the years fighting carb issues and it's almost always been timing

[@mynameis63]

Based on the tight EGT spread between cylinders...perhaps the most reliable route for a lil street engine that makes good power...go EFI. Yes more maximum power using a Carb; however, the wide spread of EGT suggests less long term reliability. Pretty interesting stuff. I considered going carb when I built my 6.1...but wanted to make good long term power. I've now put nearly 50,000 miles on this engine in 5 years. Stock gen 4 bottom end, 30 over flat tops, split profile BTR .593/.631"lift cam ...Trickflow 225X heads that flow 348 cfm at .600 92mm throttle body , 40lb injectors and 1 7/8" long tube headers. Black x racing built me a stout 4l60E with 3600 rpm stall converter , and 3:73 rear gear. Pretty tame compared to what the boys run, but runs strong...smacked lotsa asses with it...often get well into the 20s for mpg, and all I've ever done to it is Uncle Buckos favorite thing...maintenance.

[@ShawnGilbert1967]

What's it run sounds like a good combo

[@mynameis63]

@@ShawnGilbert1967 Thanks man, yeah it runs great, have never put it on a track...just a bit of street racing in mexico. I built the car to be more of a GT.

[@IlPinnacolo]

The engine doesn't care *that* much about the egt spread. You'd lose it if you saw the egt spread on a Continental O-470, and your life literally depends on the reliability of one of those.

[@terrenceadams3481]

Hey Bill! Now we are back with you learning!!! These are one of my favorite videos. Good to see everyone working together make this little 5.3 work so good. Great job guys. Very informative. As always stay safe. 😀😀❤️

[@chandlerfrazier]

Some of us would've never known that's what happens when you swap until we tried it ourselves. Thank you for putting this out for us to see, truly appreciate you and Bob passing on the knowledge.

[@darrensaunders3694]

Love the content! I use a msd 6014 box on my carbureted ls engines. The key is time them like a standard small block! Just because you have coil on plug does not make a difference. Then once its done you can do individual cylinder timing and even create a timeing curve for drive ability.

[@ShawnGilbert1967]

You would time them like the combustion chamber efficiency dictates thru every standard practice to find optimal timing for a given cylinder head design and induction package.... You go tossing sbc timing at SOME ls designs especially higher compression ones on stock pistons and have a bucket close... In his example what showed little gain at 33 via EFI needed 36 to replicate with the increased droplet size ( there are other factors involved too ), just take an LS engine that has knock past 24 degrees and toss 36-37 locked out in it at peak torque LOL bring a broom....

[@user-tr7us4zc5p]

I'm liking the way this new year is starting off. Uncle Bob doing his thing. He's looking healthy and happy since changing his work load. God bless you old man. Great video

[@David-uu1oj]

Bill, great ending to this video, I'm still smiling at the results. You da carb man bro! hance

[@chrislovett6120]

I know you don’t enjoy doing the voiceovers but of all the KZbin channels I watch you the best at it Bill. Keep the great content coming

[@justinhromek73]

I’m not in to changing jetting, accelerator pumps every time the weather changes. My Edelbrock pro Flo on my 406 is maintenance free for the most part and self corrects for any change of altitude/weather conditions. If there is any loss of hp with efi it would be minimal, benefits outweigh any negatives in my opinion

[@wydopnthrtl]

100% true. For a street car and yr round operation.... FI w/a feedback system cannot be beat. On a INDOOR dyno.. and considering costs... a carb might inch out a FI. But... my engine is in a car... and I drive at part throttle 99% of the time.

[@rodneyf.9595]

Hey Bill, great comparison. I have built carbs and modified alot of carbs for many years and have been waiting on seeing this video. At 59 years old I am still a carburetor guy but learning every day on fuel injection. Thank you bill , Bob, and welcome Ryan a big thank you to all you guys yall put a smile on this Ole guy this morning . 👍

[@stevenglosson5733]

Yall have got me through some hard times recently. These videos pull my mind off the crazy whirl wind called life . For 30 mins I get to relax and watch. Thank you all continue the great videos.

[@mrhighlight8771]

Uncle Bob and Bill..Thanks for everything. We love yall

[@hevykevy56]

Hi bill , love the carb videos. Glad you feel better ❤

[@suicidal_racing]

the gm bread box intake would be down 5hp ish vs that holley. also it is a must to verify timing on ls engines. ive seen them 8 degrees off. if verified efi timing wise for pump gas rec ports like 25* and cath ports 28* . carb wise seems to be 5* more from the combos ive had over the yrs.

[@SamSheepDoq]

Came here looking for this comment. I saw 33* and ran to the comments lol

[@scottymartin1496]

After all this time I’ve watched your family I finally got to be the first one to give you a like

[@garymatthews1572]

I know what you mean brother I caught 1 bout 2 years ago !

[@dustin2919]

Would be cool to see a single plane vs TBSS intake test.

[@pineychristian]

Bill you almost had me there with your sign off music at the end of your video. I thought your weren't going to show the E85 dyno pull and end the video like a good TV series to cut it short. Then tell us you'll have to wait till the next video. We would have been upset to have to wait ... great video....

[@jakegorman7121]

I think you ought to make an Uncle Bob t-shirt with him pushing the dyno handle through the window!

[@CCRider5312]

MY FAVORITE GARAGE CHANNEL ! 😁👍🏼 Bill I have a 5.3L LS aka: 327 Ci and I love it. Chevy made their small blocks last a lot longer and get 3-4X more miles outta them before a rebuild after they came up with the LS. I’m a old school guy from the 60’s 70’s & 80’s But Chevy took their engines to the next level with the LS as far as ENDURANCE & LONGEVITY goes. I was also hesitant to give the LS a try but once I did I really like the LS 5.3L & the 5.7L small Block LS’s they’re great engines.

[@ShawnGilbert1967]

I agree for the most part but I've seen several I mean several 350 Vortec engines over 300k in trucks ect.... Maybe 1968 tech but there is not inherent problem with the geometry of the sbc when done with modern metallurgy and build practices...id postulate drop the ring size to as thin as LS and there ya go... Now stock block isn't gonna hold the power the skirted crank LS will hell no...but endurance shouldn't be an issue with proper fueling and cooling...

[@luiscarrasquillo9743]

Loving this one, looking forward to that e85 swap 👍🏼 Appreciate the work y’all put in.

[@picklefart]

Fuel tech has excellent customer service. They just want to help. That’s getting harder to find in companies these days.

[@Gbodyshuffle]

Very cool to see the differences .. as a gear head myself I love looking and seeing the different data gathered by different setups

[@petemcpeterson6205]

Holdner had similar results. Made the most peak power with a carb. He made more power at lower rpm with efi but was using the FAST intake.

[@timrayburn2461]

Great video.Thanks to all involved

[@brentjohnson2315]

Uncle Bob “I don’t know why you watch” 😂😂😂

[@jamesbarton2950]

Thanks for new video 😊

[@jeraldhite9744]

Super interesting!! Thank You. Good to see Bob doing well.

[@yodawunn6700]

Bob at the dyno is like a pig in a cool mud hole, lovin every minute of it.

[@scrotiemcboogerballs1981]

Keep warm everyone thanks for sharing

[@billbong156]

Very good video. Great info. Thanks guys!

[@mcintyretyler89]

I appreciate the knowledge u share Bill. Thank you sir

[@jbabister]

Excellent VIDEO!!!!! great source of information

[@andibk100]

Love your show. Keep them coming.

[@OmgWtfTsuji]

Ooh, looks like I'm pretty early for this one.

[@JBAutomotive794]

the MSD 6014 setup to run the LS ignition system probably would have been better suited for running the motor with carb. cool to see bob playing with his new dyno setup.

[@ShawnGilbert1967]

I'm not sure why they couldn't run a map sensor off the plenum and just run the fuel tech it doesn't know what it's hooked too, ive done this with FAST, MS3Pro and Holley

[@JBAutomotive794]

@@ShawnGilbert1967 I agree the Fueltech was confused because it was missing a TPS signal as well no Map signal.

[@ShawnGilbert1967]

@JBAutomotive794 I'm not certain on fuel tech ( but I mean Bob should invest in a carb retrofit tps many sell them, ive used them for carb 4l80e applications) but just off the top of my head wouldn't speed density go pure map... Though TPS is probably telling the ecu that it's at idle... For a bush work around a $12 oriellys ls tps plugged in, scaled, then laid to 100% walk out cell? Just for that day.... But yea a retrofit carb TPS would probably be useful there...could go carb to efi testing and selling..... It's interesting it's been years since I looked at fuel tech software though I went deep in MS3 Pro Ultimate which is limitless if you think it, between you and the community it will do it lol....running a damn Rasberry Pi4 to handle can shit, wild west fully unlocked dream it do it..

[@MsMoose1979]

Love watching you old junkyard dogs learning new tricks! Much enjoyment on my end!

[@Pyle81]

So assuming this is a 99-07 (likely a LM7) 5.3 Cast Iron truck engine. It came factory with 9.5-1 with Dished Hypereutectic Cast Aluminum pistons. And as we saw with the fresh valve job 706 heads (61cc Combustion chambers) 1.89 intake, 1.55 Exhaust vales. Id bet a 700 cfm carb would have been a little better candidate for the test. But you use what you have. The last E-85 card definitely helped. Because this engine was designed to run on E-85 from the start (706 Heads and lower compression Dushed Pistons) That bigger carb was just drowning those poor 9.5-1 pistons to death. And is why the spacer helped to allow more adamization of the fuel. Fuel injection (Cathedral Port heads) don't do well carbs to begin with. So giving them more room to breath and mix the fuel air definitely helped as we saw and heard in the EGT's. And definitely with the E-85.

[@glamiskid50]

Really enjoyed seeing the comparison on an LS with the carburetor and tuning tips from the old man

[@taurenbukoski1044]

Can’t wait to see a part two of this dyno video keep up on putting out good and informative content

[@williamalley4976]

This is a great what to do video! Great job Bill and Bob can't wait to see More!

[@jamesdavis4859]

Good job bro

[@curtiswhetstine9536]

I really enjoy these kind of video's

[@jimmonk541]

Great video sir stay warm. Thank you, uncle Bob.

[@matthewvalentine3549]

Thank you for your dedication to show us all this. Absolutely love yalls content

[@chrisbunting6022]

Great videos mate, always a pleasure to watch, very interesting efi vs carb and old school wins, good job.

[@enigmacamaro]

I 100% agree with you, the spacer with a single plane would work quite nicely on that engine. what a lot of people don't understand is whether it's a small block, big block, ls, ford, or even dodge. you have to remember that they are just basically big air pumps. With that it's hard to knock on a stock engine with a cam making over 400. got to love that flow from those ls heads.

[@alanmeyers3957]

They are not air pumps, at all.

[@enigmacamaro]

@@alanmeyers3957 explain to me how they are not. They suck air (and fuel) in, compress it, power stroke, and then press air (exhaust) out.

[@horsefly1020]

He can't explain it.​@@enigmacamaro

[@ShawnGilbert1967]

Look up the term volumetric efficiency ( hint it's how the efi works and why they are air pumps)...with overlap and headers for scavenging you actually can get more than 100% volumetric efficiency and it all depends on baro at intake stroke I just cant understand how people, though it's cliche, can't see engines as air movers...everything is rated that way including gasp port cfm....

[@Suspension_Shaun]

Good video Bill. Very useful information

[@greghovies9685]

video was informative .always good to see uncle bob an his assistant an of course the ole man.thanks for sharing

[@ridgerunner6753]

Bill, outstanding content & video. Glad to see your top side again. All the beat !!!

[@colekitten1367]

I always learn something from watching your videos bill keep up the great work

[@deansutherland3570]

I love it when your at Bob McVays engine shop.. I love engine building and hearing them on the dyno 😎 Cheers from 🇨🇦

[@tuffram2165]

If you get the 7.3L gas make sure yo get the 10 speed and a lower ratio rear gear. This will make up for a lot of the power loss from not getting a diesel.

[@jasonbamford7579]

Great video Bill, I love the videos of you and Bob running the LS with the efi and then the carb very informative.

[@ericmark472]

Another great video Bill - really interesting to learn how to deal with these various issues that most people inevitably run into at some point if you're messing with a new combination.

[@happydayz5321]

Great video guys !

[@boostedz0683]

Love it Bill!!! Keep em comin!

[@JustinB...303]

The info is amazing. Love the carb videos. I have learned so much. Getting ready to fire up my 71 nova here soon once it warms up. Having a timing issue coughing put the carb. Pretty confident that is what it is. Thanks old man!

[@bethanyhaskiell9116]

Throw a Fast LSXR intake and a bigger TB and see how that compares to the carb swap

[@donhorner6019]

Nice video Bill,I love it when we learn something

[@kyletrusty7228]

Absolutely love this video keep em coming guys

[@jessiecasteel2902]

Never fails omg here I am 230am in morning watching this video with at most love the old man's garage in macvays Dyno room.E85 years through this perfect LS 5,3 I love to put in my 04 Silverado..

[@thehouseofhorsepowerautobo4506]

Lol I just read this and it's 220 am

[@jessiecasteel2902]

@@thehouseofhorsepowerautobo4506 I made that comment month ago.... DETAILS

[@bs081502bs]

I watch Engine Masters all the time, so I knew I was going to enjoy this video for sure. Another awesome job Bill!

[@benjames2497]

Great to see uncle bob laughing and enjoying himself.

[@jerryfrederick6610]

Love Uncle Bob. What a great guy he is.

[@Petethedeadboy]

Excellent work. This is racing science that i love. ❤

[@billm7327]

LIGHTS OUT ! AMAZING knowledge solving real-world problems. Keep the bangers coming.

[@caseykohrs6701]

Great video. That was very educational. That’s going to help a lot of people get there set up right. Great work guys

[@jasonhayden7597]

Great video!! You and Uncle Bob have a wealth of knowledge! Keep of the great work! Uncle Bob is hoot!!

[@rafaelbonilla3759]

Wow, like that swap of carburetor. Good job Bill.

[@johnperun232]

Great Content for the LS not looking to to do the change But your helping me with the process Thanx for sharing your experience And thoughts Have a Great Day 👍

[@K.u.i.MotorSports]

Keep on grinding sir!! You’re doing great!!

[@MrBurris_]

Great video and education Bill, keep up the good work !

[@tboysen00]

Love the more technical videos!! OMG to the front!

[@OG_Gamers_Live]

Well done.

[@huntershannonhouse3871]

You explaining what was going on throughout that video. Brought a lot of knowledge to my attention. One of my favorite videos in a while 💪🏻

[@sanger440]

I love back to back tests. I remember decades ago Pat Musi was an early adopter of EFI. His race engines with carbs always made more peak HP than EFI. But he proved EFI was faster on the track than his carb combos because EFI made more power throughout the power band (under the curve) . Cool video, thanks.

[@bntrouble31]

Yes

[@joeszabo4237]

Great vid Bill!!!

[@zachniverson8816]

Loved you throwing the E85 carb on and showing the numbers... Crazy that the E85 made so much more power than the gas on an engine with just 9.5:1 compression..... I think a set of flat tops to bring it to 11:1 with the same combo dialed in it would see 450hp and 410ft lbs.... I love these videos of the in depth carb tuning😢

[@bertwalts3211]

Love the way y’all do your videos

[@travisdilligaf3544]

OOOOOHH Mr Billiam......this is awesome! I did an msd for a 6.0 ls carburated. Revs up so fast. I knew about this 10 years ago. Thank you sirs for showing the learning curve! FnA. Bill and Bob The old wise men. Great work!

[@macfranks2456]

Thanks Bill, another Great video and learned a lot watching this. The little 5.3 can make some pretty good power.

[@kevinshields8278]

Engine Masters Bill and Bob episode! I definitely love it, thanks for posting!

[@josephsouers4148]

Thanks Bill for making up my mind I’m staying carbureted much love and respect to y’all’s whole program

[@khalood_383]

Single plane intake will make that motor sing, another test I would do is flip the spacer on the dual plane (the holes faces the intake) and see if it likes the divided center of the spacer and distribute the mixture, can't wait to see the e85 results and amazing content sir thank you.

[@scottburrow8717]

Proving a point on This video Mr Bill. Great job on this video!

[@joshmiller8663]

Great video Bill never knew the timing thing about fuel injection to carburetor. Thanks

[@danbates421]

Jeez Bob looks great. Relaxed and happy. All the rest you’ve allowed him has been good stuff!…..

[@brucehuff5566]

I found this very informative for me thanks.

[@davelistonsmith2841]

I can only imagine how many carburetors you have played with to get this knowledge.

[@Sebastianbartledoo]

Mill those 706 heads .040 and do a 3 angle vj with 2.00 intake valves just to see the power it picks up.