Dyno Results: FiTech EFI Versus 750 Carburetor

[@headlesnorseman701]

Love these videos that post peak numbers when the MAIN reason a fuel injection system is better is the area under the curve

[@octaneartllc]

Prestige world wide, world wide, world wide.....

[@russellgillick7637]

😂

[@jasonw3303]

Investors? Possibly you !

[@sshyshy6097]

​@@jasonw3303 😂😂😂

[@R0yL33]

Peak hp/torque is nice, but seeing the entire curves would be better.

[@axlegrind4212]

forget peak horsepower numbers in a street car. the engine stays in the torque range much longer than it sees peak hp. of course you want the fuel mix correct at peak rpm but for the street you want the torque curve to be properly tuned along with drive-ability.

[@josephloro633]

i think the point of fitech is to have ur cake n eat it better mpg easy start on cold days n same hp as carb

[@mimixownzall]

And for off road it helps with extreme angles.

[@jfv65]

EFI + O2-sensor feedback can also compensate for altitude variations and extreme temperatures.

[@kaleschelin8067]

Except the three people I know that have run fi tech got much worse gas mileage. The secondaries kn the fitech are manually operated with linkage, making it non adjustable. The secondaries open almost immediately, killing mileage.

[@headlesnorseman701]

Kale Schelin did you have them quantify this? Direct A and B testing? Or just some me too type of story? Because that doesn’t make any sense. Fuel is used based on load, so unless they were just driving the piss out of the cars afterwards, it should be better and at worst exactly the same as any given carb

[@tomtom1541]

@@kaleschelin8067 it sounds like you don't understand how these meter fuel. Fuel metering is entirely determined based on intake vacuum, the primary or secondary butterflies being open has no effect (apart from the drop in vacuum). It doesn't care which one the air is flowing though.

[@NickKautz]

I tried the FiTech for a couple months, ended up switching back to Holley 750. It takes a while for the fitech to learn fuel trims for your application , during that time your motor will run like crap. Also , it's a road-race car and even after it was calibrated , it struggled to transition smoothly from heavy decel (lean) to on-throttle (rich) without stumbling for a few seconds each time. It's probably possible to tune-out that stuff eventually but you'd really have to dig deep into their controller software, which has no fuel map, only afr targets.

[@prestigemotorsports]

You are exactly right. The FiTech system is a low budget, entry level fuel injection system. If you have an application that requires fine tuning, we recommend going to the Holley Terminator system.

[@matthewweidemann8155]

Yeah, I know a mechanical engineer turned mechanic who has built crazy cars, but a customer came in with one of these kits on his car, and it's a nightmare--instead of learning, and getting better, it only seems to get worse. I'm sure there are ways to get it right, but a 750 Holley is looking like the best solution, at this point.

[@NickKautz]

I believe it. Mine got stuck in a loop where low rpm/high load would be so rich that the o2 would read full lean due to all the unburnt fuel .... the fitech would ADD fuel and make the problem worse.

I got the efi 8 power adder plus. Pro tuning software. I had to change some numbers around, but with the help of a couple other videos I was able to tune out my issues. I have it running perfectly now. No hesitation, no lean popping at cruise in certain rpm ranges. Makes over 600hp roots supercharged sbc

[@m.a.p.4hp737]

FiTech was a nightmare to work with. And I'm not just talking about their product. I bought 10 kits a few years back to install out of my shop. After sending 5 or so of them to FiTech for repairs they never worked well. I literally threw them in the trash. The speed shop that I bought them from won't even carry them anymore. The owner of the speed shop said that there were to many crappy units and too many pissed off customers.

[@furyfantoo]

As noted, this dyno run was done solely at WOT, so a std mechanical distributor advance is sufficient. But the other big benefit to an ECU controlling an engine lies with ign timing at part throttle, in real driving conditions. The max torque/hp from a dyno tells only part of the story - a well-sorted EFI system with ECU'd ignition will have more hp and torque *everywhere* - more area under the curve. As an example - when the coolant temp and ambient is cold, any engine is going to respond noticeably to 5-10° more ignition timing, and an ECU will do that gradually, seamlessly, throughout the temperature range.

[@ThePaulv12]

I'm not sure about that. I'm splitting hairs to be sure, but carbs generally make more power because each individual venturi is load sensing whereas in a TBI setup fuel pressure and injector pulswidth modulation control the injectors so there's no individual sensing in each barrel. Of course the benefits of slightly lower power of the TBI vastly outweigh almost every other aspect of a carb. But if you're drag racing you may well be better off with a carb.

[@Popsm0ke]

I would have loved to had a fitech back in high school. I hated cutting my car off cause I'd be constantly be praying " oh dear Lord please allow my car to crank." and I had a 70 Plymouth roadrunner. Sadly I no longer have this car but I have a 69 roadrunner.

[@craphittingthefan9445]

I use a 800 DP on my 408 Windsor, I am a good tuner on carbs my 408 makes 530Hp with 210cc heads, I believe after seeing this dyno test, I will stick to my swap meet carbs for my uses a daily driver, I could see this unit making sense.

[@ViewThis.]

Hey FiTech make one of those that's super low profile for sitting on top of a Roots Blower so a person can get some hood clearance. There's no need for it to be that bulky when on top of a blower providing lotsa suction under the throats.

[@jasontrevis7142]

There a lot of comments regarding horsepower and fuel economy. The only way to really compare fuel economy between the two induction devices is to measure fuel used for identical load runs. Then compare the amount of fuel used against the horsepower/torque measured.

[@Amilzera]

Fitech uncomplicated and simple, for V8 the best I've seen so far.

[@michaelsimovic2507]

Had to make a few runs with the efi to get the best results I wonder if as much time was taken to optimise the best carburettor for this combo? I somehow doubt it

[@stevesolo16]

Just to note, if you have a beautiful engine like that you would think to have the carburetor set up correctly. You could hear the squirters needed to be upped a size or two, perhaps the accelerator pump as well. That is the beauty of carbs. Set up it would, at the very least, equal the injection if horsepower was your goal. But, when it comes to "set it and forget it" fuel injection is a godsend. BTW: How did you pick the CFM size carb for this engine? There is a mathematical formula that will pinpoint the correct size.

[@electronicatutorial]

It is not a competition of peak HP it is a competition of wich one is faster and that has to do with the power curves.

[@danmyers9372]

Would like to see a comparison using an 850 cfm carb. The 750 seems a bit low for 427 ci.

[@jerrycordova1971]

I noticed the engine has a perfromer rpm intake which are dual plane. was there any issues with that or is that why it has a carb spacer?

[@jeffe4638]

I just ordered a built chevy 350 with fitech fuel injection hope its worth it

[@flaircraft]

Are there any dyno results of the engine with the carb fully tuned? It would be interesting to compare the self-tuning ability of the FiTech with the tuning capability of a human with a carb.

[@salazam]

Kasparov vs. Deep Blue. The human always wins.

[@roknroy1]

1 tenth and 1mph, for about 1200.00 and labor, keep the carb

[@sublime929]

Ever heard of drivability? These are great for street driven cars. On a race car, ok keep the carb.

[@danmyers9372]

And an 850 carb would probably tie or heat the FiTech.

[@coryholbrook4643]

See, that’s the problem with all these carb to TBI FI comparisons, no one does it properly. The carb is tuned and the efi isn’t given a chance to learn or the carb is box stock but the efi is tuned. This is too biased and too simple. Does the average carb user just slap it on and call it good? I’m a beginner with carbs still but I haven’t left mine alone. I bought books and a wideband to help me learn about and get it right. Also one hp/tq number at a single rpm is too simplistic. The guys who are REALLY interested in this comparison will want to know more like all plots across the entire driving range and air fuel ratio control as well as mods done to the carb to achieve that performance. That’s where you can keep the carb tuning to the average user, jet changes, idle mixtures, power valve, secondary opening rate, squirter cam, etc. Maybe even some of the slightly more tunable restrictors available in the aftermarket billet metering blocks that are so prevalent now. That wouldn’t be a 3 minute video but give real hotrodders some credit. We’re not all like the modern muscle crowd of bolt it on and go.

[@johnterpack3940]

@nineball26 how many people drive between 13,000' and sea level on a regular basis? Many of the benefits of EFI are overhyped. I grew up before EFI existed, cars got around just fine as seasons changed. Frankly, other than starting on really cold mornings I don't think EFI has any real advantage. A properly tuned carburetor can easily accommodate changes in weather and altitude well enough for the vast majority of people. And it will make just as much power. EFI is just an emissions tool and a way to drive more business to the dealerships with "check engine" lights and bunches of new parts that can break.

[@salazam]

That nigga said "welp"

[@302hobronco]

Good review.

[@danhenderson783]

CFM to CFM a well tuned carburetor should make the same power as any EFI @WOT.

[@MrTNBassmaster]

Dan Henderson 300 carb over a 1000+ efi setup and maybe gain 20hp ill pass.

[@ThePaulv12]

Of course - HOWEVER - altitude correction, temperature correction and throttle response are all going to be superior in the injection and won't require rejetting. Consistency of tune in varing conditions and better fuel consumption are other benefits as well as better throttle response in cornering. In some ways it looks like the end of the carb is in sight fopr the mainstream hot rodder. Reliability of these systems is yet to be properly established.

[@Dman216]

yes the carb might be able with hours and hours of pinpoint tuning make more at a specific rpm but it wont come close against the EFI across the entire rpm band in its abilty to self tune from idle to max rpm as you drive to keep it happy no matter what the driving ya doing also that carb will go to shit with just a 1500ft drive up a hill when that efi system is good to 10k feet up and will self adjust for lower oxygen air higher up or oxgen rich at sea level..have fun driving that carb up a mountain LOL when its popping and spitting a shitting out 3 miles per gallon and that efi is getting 20+ and running cool and not running pig rich or lean .. that's the advantge!

[@irenemontellano6637]

TheDman216

[@BornToBeFamed]

TheDman216 the mpg gallon argue is false, i have a 750 dp holley on my malibu 360 stroker and im still getting 20mpg on the hwy and about 13-15 in city. But my are is geared for street strip.. if i was running 411s then yes my gas millage would be shit. But the efi i will switch to because of the cold starts , and how well it adapts to the weather. I dont have to tune it as much like u would do a carb

[@qmopar]

Were you using the FiTech unit to control the timing?

[@fastmonaro05]

Very Impressive results. Just wondering what is the camshaft profile specs eg duration, lift, roller, @0.050??? Seems to make good torque low down and HP at a good street RPM range.

[@llineedsadragstrip4089]

good video!!!!!!!!!!!!!!! @ dan previous comment im done with carbs this new gen fi carb replacement is the way to go smooth ,,,,,, what moore do you need ....

[@Uncle_Chuck]

What was afr like

[@apfeldk]

why is the boost referance pluged in?

[@TrentGustus]

I'd like to know what the torque figures were like at highway rpm 2500.

[@furyfantoo]

2nd thought - how many of us get the ignition timing where we want with our distributor, only to have to back it off a few degrees so that the engine isn't bucking against the starter from a hotsoak - just for those times when we might run into the store for just a few minutes? Ever driven around with your distributor wrench for a few days after adjusting the timing, just in case??? Those days are gone, an ECU backs timing off for the temperature, in just those conditions.

[@Shane-Singleton]

But I don't think this system controls spark, does it? I thought it was air/fuel only. But.. I totally agree with what you say about the benefits of a complete EFI system taking care of the timing, etc. for you.

[@Thanoric]

The more expensive FiTech's can control spark if you have the correct setup. It's cheaper to just have it control fuel however.

[@stevenledford5183]

I recently bought the fitech after viewing this video. I installed it on my car and I was going through the different parameters in the handheld programmer and there is a ton of different settings. Who or where can I look to learn how to get the best out of my motor because a lot of those setting are beyond my knowledge. Anything you can do to help is greatly appreciated. Thank you

[@stevenledford5183]

thank you for responding. Ill be sure to check out the forums and see what I can find. How would you do a remote tune from your shop? How does that work exactly?

[@stevenledford5183]

It does have a USB connector on it so that's why I thought it would be able to be connected to a computer. Ill have to do some more looking on my own then. Thank you for your help sir have a good day.

[@TrentGustus]

What about high altitude, on a big block?

[@danielmottweiler9809]

How well does this fitech system deal with boost.Does the power adder version self tune as well.?

[@phillipthomas5133]

Daniel Mottweiler why not look into the new Holley super sniper efi? It’s the same as the original sniper efi but it’s this version is made to support boost, which the original is not

[@63grandsport11]

Why was the tuner box cubic inch set 346 not 427

[@JoeAmaral427]

Just a question- what would max rpm be on that engine? 6200?

[@colby4181]

Is the command center necessary??

[@charlesbrowning5441]

What do u think about the fitech 2x4 for a blower the part number of the fitech is 30064 thanks Dewayne

[@prestigemotorsports]

We have not ran that set up so we really dont have any input. What we can say is for a blower motor and any other professionally built engine its hard to justify using the cheapest EFI system on the market to control 2 of the most important functions of the engine. Fuel and Timing.

[@Parents_of_Twins]

What octane gas are you using in your dyno pulls?

[@kennethsears156]

I don't know if u know this but FITech tells you not to use the vacuum port on the fuel pressure regulator. They say to leave it vented to the atmosphere. I can see you haven't vented it. I'm curious how DYNO results may vary from what you have.

[@rctrukboi]

All depends on where the fuel discharges from the injector, above or below the throttle plates. If the tip of the injector sees manifold vacuum, the regulator needs to be referenced to that.

[@kennethsears156]

the throttle body uses an annular discharge fuel spray pattern. It sprays fuel above the throttle plates

[@BillyP-49Chevy]

I would like to know what fuel pump was used on fitech. I dont want to purchase their command unit, i'd like to use a regular inline. Like red or blue for ex.

[@rogerramjet5092]

Holley's red or blue not capable of the pressure required for EFI. Holley does make pumps that will work but the more popular choice is a Walboro 255L They are good value and widely available; in both inline and in tank.

[@pepitomateo1]

Sorry guys, I don’t buy this, I tried fitech in my car, it was a nightmare. Probably I noticed a bit more power in high rpm vs the carb probably cause of CFM capability but transitions were full of issues. Don’t mention slightly altitud changes, computer got crazy! I also tried Holley sniper, I got really impressed! I works really good, just like a carburetor.

[@SpeedrunTnRC]

Can the power added o e be used with a plate style wet nitrous system

[@ThePaulv12]

Yep on some systems. I bought their dual quad system (yet to be installed) and paid the extra $200 for the premium setup and you certainly can run a plate style wet nitrous system and control the ignition for nitrous too. The extra $200 is a no brainer - don't even think about saving a few bucks because all their premium systems have a software suite that enables many extra tuning perameters. Their premium 8 injector single TBI does everything. You can get a lockout dizzy and even control vac advance for cruise in software (I think) and have an ignition curve impossible to have with weights.

[@salazam]

@@ThePaulv12 What's a "perameter"?

[@ThePaulv12]

@@salazam A typo fuckwit!!

[@coachrickvice2643]

What intake is this? I've heard the FiTech does not like a dual plane intake. That's why I'm asking.

[@coachrickvice2643]

prestigemotorsports thanks for the reply. Watch the Motor Trend video on the FiTech. They use a dual plane to start with and it will not run. Changed to a single plane, and it worked great.

[@coachrickvice2643]

prestigemotorsports @ about 7 minutes they start explaining. They explain that the dual plane was causing a fuel distribution issue. I'm not saying it does or not, just what they say.

[@72MrHotrod]

I've heard the same, single plane is best for fitech EFI vs the dual. when I do go to EFI, I'm gonna get a single plane too.

[@rogerramjet5092]

That wasn't a FITech. It was a Holly Terminator tbi setup on a 5.3l ls truck motor. So yea exactly the same. There are dozens of installs of various tbi FI that work perfectly. think it was a fluk.

[@SS_SMOTHERS2197]

+prestigemotorsports did you use a space to put on the bottom of the intake and if so what kind and how many inches?

[@memadmax69]

The thing about it is: If i'm going EFI, im going MPFI....

[@Dman216]

mpfi is very good..this system is more for ya carb manifold ya already have in a self contained system still an awesome one for sure

[@memadmax69]

Yep, back in the old days we called this soda straw injection.

[@headlesnorseman701]

MPFI is going to have more of a benefit on a 4 cylinder or anything with uneven cylinder pulses. I doubt it would make much difference at all on this. Maybe cleaner idle

[@mh70ss]

I have a GO EFI 4 system. I noticed that you did not have a lot of wires around the unit. Did you remove all of the wires that you were not using?

[@bigdoo350]

750cfm for a 427ci motor? Put a 850cfm holle ultra HP. Those peak numbers will be even. Gas mileage will suffer a Lil but Shit it's still a big 427ci engine.

[@hrbestalkinme3690]

That 750 carb was too small. Do it right and honest.

[@christophergadson5354]

I would like to see somebody fine tune a carb seems like everyone just slap it on the engine and that's it that fuel injection is going to fine tune itself fine tune a carb and let's see the results

[@jonayamaha3215]

now do carb and programmable ignition vs efi :P

[@dh66]

efi still wins, especially this simple system here

[@walkinshawkiwi]

Put a bigger carb on it and i bet the HP will go up

[@bradleycampbell5933]

thats what every high school punk says

[@myfordranger]

like mine 750 vs a 950 on my 351w stroker.. didn't like the 750.. dyno sheet don't lie..

[@myfordranger]

950 like mine.. it didn't like the 750 too small.. for a 400 cu in ..stroker

[@hrbestalkinme3690]

Bradley Campbell I run a dyno for a living, and I agree. That engine was choked by that carb. TBI offers no peak horsepower advantage. Doesnt help with cylinder-to-cylinder fuel distribution either.

[@Southernbread686]

Bradley Campbell ha I can promise you I’m no high school punk and I also say it needs a bigger carb, you will not gain any hp with a tbi setup over a carb

[@joesimon2018]

Doesn't seem worth the $2000 parts and labor that it would cost me to pay someone to install it in my 79 corvette with a new crate engine.

[@cyrusvirus6928]

Joe Shmoe you can save $1000 by installing it yourself.

[@shanerichardson9568]

Dozens of how to videos on KZbin!

[@daxtonbrown]

Just added parts to go wrong with EFI for little difference is what I'm thinking. I'm gonna get the new annular Edelbrock carbs for my 57 Bel Air and 67 Camaro. They are $308, so I can buy a lot of gas for the difference in price compared to EFI and still be in the ballpark.

[@Goldiney]

You're not thinking clearly. EFI's provide benefits far greater than improved gas mileage.

[@Anthony-qj7qe]

Not a big difference in my mind

[@jefferybernard4800]

It was hard to understand too loud and too far away

[@edwinstorz702]

And we are suppose to take his word 2019.........lol

[@MrA1Goku]

I watched a video from a guy called "Nick's garage" doing the same kind of testing...carburated vs EFI and at full throttle the carburated test produced 10 more hp than the EFI, so this video of FITECH is nothing more than a sales pitch

[@coryholbrook4643]

Joe Seely but like this guy his test was biased too, just in the opposite direction. Nick never gave the efi computer a chance to go through the learning cycle and square away the tune. He wasn’t interested in letting the efi system perform just like this guy bolted on a carb and called it good like the “average car guy”.

[@MrA1Goku]

@@coryholbrook4643 very good point, it's just that you see so many of the " he said " " she said " videos on this bolt on kit " or " that bolt on kit...that it makes a guy want to just go back to riding a fricken horse...lol !

[@salazam]

​@@coryholbrook4643 If you actually watched the video you can clearly see Nick letting the efi go through the learning cycles. The narrator even says "For a while, you can almost hear it thinking" at 4:39.

[@177SCmaro]

Having a computer fine tune the air/fuel for you? Where's the fun in that?

[@sx600]

Any one wanting to buy a Fitech should think long and hard about wasting your hard earned cash on this system. Months of drama and no support for Fitech. Still not running!! Junk!!!

[@Dman216]

yes the carb might be able with hours and hours of pinpoint tuning make more at a specific rpm but it wont come close against the EFI across the entire rpm band in its abilty to self tune from idle to max rpm as you drive to keep it happy no matter what the driving ya doing also that carb will go to shit with just a 1500ft drive up a hill when that efi system is good to 10k feet up and will self adjust for lower oxygen air higher up or oxgen rich at sea level..have fun driving that carb up a mountain LOL

[@Funtimes670]

TheDman216 I had this exact conversation with a guy on a forum page the other day. I you live in a flat area I’m sure once you get it tuned right it will be fine. But try climbing even 5k up a mountain and that carb will be way fat. I wonder if they can replicate that on a dyno pull somehow?

[@cartrachito]

Prefiero la fidelidad del carburador!! porque no pusieron un mejor carburador? solo un humilde 750 cfm existiendo otros mejores? que comparacion mas insulsa....esa es mi opinion!

[@jonasvreblstad8442]

amz viedo

[@ssdtrain1]

not worth the money... I've seen these Fitech's make "Less" HP than the carbs did.. that's cool that it can start easier on cold days, but c'mon I'm not driving my SS Chevelle @ 45 degrees..!!

[@colby4181]

Not sure its horsepower youl notice. Must be one of those non power steering guys haha.

[@coryholbrook4643]

Why not if the weather is clear?! Sun’s out I’m all for driving the hot rod.

[@hrbestalkinme3690]

You guys compared it to an incorrect carburetor choice that was not even set up properly. So that tells me you KNOW that this cant beat a carb.

[@mrliftdoc007]

So I run one on a 500 in big block in an air boat I can run all day on a tank of fuel and with my Holley I could be dry in about 4 hours . They have changed my mind set for life . My carb never started as good . With gas savings I’ll be making money this year

[@hrbestalkinme3690]

mrliftdoc007 so your carb was jetted too rich. And we're talkong horsepower not mpg.

[@GG-rj4oj]

You are correct. Why was a choke style carb body used? The efi set up uses a hp style main body. Your test is misleading.

[@beardedforlife3740]

Just because a carb can possibly make more hp doesn't mean it does so efficiently. It's not as easy to atomize fuel with a carb as it is with a fuel injection system

[@williamgoodwin4462]

To much computer bullshit for not really gaining anything in my opinion, but some people love dinking with computers all day

[@normbarrows]

yet another "comparison" of EFI (after lots of learning) vs a carb that's not dialed in. so bogus.

[@pierre-lucmartin1727]

Blablabla... Blablabla.........

[@Vander_berg]

"Self learning system that is great for low vacuum applications"... that is treading into misleading territory. You will likely find out after you buy and install any MAP based (I.e. not MAF) self learning system that you need a minimim of 10" of manifold vacuum. At 7" of vacuum at idle there is very little resolution between idle and WOT. Be prepared for a "very rich" idle with only 7" of vacuum.

[@whatsinaname1829]

Fitech has been proven to work on engines with low idle vacuum, were other EFI systems have problems.

[@stevecooper8121]

What he didn't tell you was the 750 was way to small for the motor.Needed a 850 double pumper at a minimum then the carburetor would have crushed the EFI but when your trying to promote the EFI you have to use a undersized carburetor and tell me some funny math at how you arrived at that size.You know cubic inches dividend by rpm × 3456 subtract the b.s. and there you have the size.I use a 750 on my 351w with a mild cam and gt40 heads with dual plane intake and your trying to make me believe that it works on this motor, what a load of b.s. Fake news.

[@prestigemotorsports]

Steve, if you have some dyno data to back up your claims we would be happy to review them.

[@stevecooper8121]

@@prestigemotorsports No data just a 351w that had a 600 cmf holly now has a 750 Quick fuel and goes 2 seconds faster in a quarter mile. That's all the proof I need gentleman.

[@prestigemotorsports]

@@stevecooper8121 Sounds like the 750 is what your engine needed. But remember, just because a bigger carb worked on one engine combination doesn't mean a larger carb will do the same on every combination. As others have pointed out in the comments, the goal isn't necessarily peak numbers, but area under the curve. For a street engine, the RPM range (curve area) is much wider than a track engine. So a few horsepower gain at the top isn't worth a sacrifice of horsepower in the majority of the curve area. However, if a track engine is operating in the top 2,000 RPM band, then the few extra horsepower is desirable since that is the range you are actually using. While the video doesn't address the area under the curve, we did not loose anything, only gained. To your "850 minimum" comment above, I can assure you we have tested several sizes and designs of carburetors on this combination. The SS-750 is the best all-around carb. As stated in the video, we surely could have made the same numbers with a carb, but it would require in-depth (more than just jetting) modifications which would also change based on atmospheric conditions. The EFI system accounts for those changes automatically.

[@user-zu8dd7hf1w]

Well alot of mis information here didn't give cfm rating of each and also didn't show the shitty fuel curve of the throttle body injector vs. the carb that obviously no one knew how to tune. Lol so do your valid research a carb will always make more power and have a flatter lean cruise and tip in than ANY efi . Yes the injected moter will start better cold and economy will be slightly better ( at the expense of a hotter engine remember fuel cools!) but will cost more alot more things to fail and less power! When engine is warm with a good carb ZERO difference in driveability!!

[@tomtom1541]

You've made multiple mistakes in your comment there. If you watch other videos on KZbin the fuel curve of a self learning EFI system will allways be more consistent than a carb because you have much finer control of fuel when you transition from part throttle to full throttle, on a carb you end up with fluctuations in afr when things happen like going from the idle circut to the main circut, or the power valves opening. You've also forgotten that if the carb and efi system provide the same quantity of fuel, the intake temperature between the two will be identical. The only way the intake would be cooler on the carb is if you have a higher fuel flow rate or a richer afr.

[@CamaroMan79]

Tune the carb better and it will outperform that efi.