Starting an opinion thread that is controversial, EFI vs Carbed LSX engines
06-17-2008, 04:52 PM
#41
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I don't know what the term part throttle means......It's either WFO or nothing.....figured I would throw some humor into this serios thread. My two cents is this, if you want to tune your efi you have to buy the software to tune it and I am sure it is at least 600 bucks. All I need to tune my carb is a screw driver .........
lol That is the truth......If you want fuel economy you probably shouldn't build a v8 either way. 
06-17-2008, 05:08 PM
#42
It's all in the intake and heads, baby. Not every car needs intake runners tuned for mid RPM torque.
Driving WFO all the time would require placing a catch tank under the driver's seat. Passenger seats too I guess.
Driving WFO all the time would require placing a catch tank under the driver's seat. Passenger seats too I guess.
06-17-2008, 05:12 PM
#43
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May have this in the wrong section. This is my home area since I am doing a swap in a non original LSX car. Want to hear from my home room guys.
What do you think about LSX engines that have been changed to run a carburetor?
What are the pros and cons of either induction?
Why did you pick the carb/efi setup you run in your car?
I have formulated my own opinions on this but am interested to see what others think.
What do you think about LSX engines that have been changed to run a carburetor?
What are the pros and cons of either induction?
Why did you pick the carb/efi setup you run in your car?
I have formulated my own opinions on this but am interested to see what others think.
06-17-2008, 06:15 PM
#45
cam72aro-How does efi live differ from hp tuners or ls1 edit. My old camaro was tuned with hp tuners I think(it has been a while) and I have seen many ls1 cars locally tuned by ed wright and a few other local tuners(not bashing anyones tuning). All of the cars I have seen that had been built on the radical side had alot of the same bad characteristics of a radical carb engine. Poor idle, pig rich, part throttle surge and a big drop in mpg. I am sure that if I swapped my th400 for a t56 I could get 18-20mpg out of my set up. Might have to add a map sensor for some vac advance, but I am sure it could be achieved.
06-17-2008, 06:37 PM
#47
There's not alot of info on the carb setups here. I am interested as well to see what mine dynos but im still waiting on my driveshaft from dennys. I am hoping for around 420rwhp cam only.
06-17-2008, 07:20 PM
#48
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The guy Chris-m who replied in the thread before with a 220ish cam, stock heads and carb setup with 750 demon dynoed like 412rwhp.
There's not alot of info on the carb setups here. I am interested as well to see what mine dynos but im still waiting on my driveshaft from dennys. I am hoping for around 420rwhp cam only.
There's not alot of info on the carb setups here. I am interested as well to see what mine dynos but im still waiting on my driveshaft from dennys. I am hoping for around 420rwhp cam only.
http://www.carcraft.com/projectbuild...ock/index.html
06-17-2008, 08:17 PM
#49
theres probably a pretty good reason why no manufacturers sell vehicles that ARENT fuel injected.
EFI is superior to carb in many ways
Carbs also have their plusses
just depends on individual preferences.
going carb because its more "period correct" is also a poor reason to put a carb on an LS1 swapped vehicle. if you wanted "period correct" you would also get a block from that same period
at the end of the day, an engine doesnt care how it gets its gasoline into the cylinders, just as long as it gets in there when its supposed to be there, but technology allows incredible, safe, easy and automatic control over the basic functions of the engine.
a question to the fellow who prefers his carb'd ls1 to the efi that was originally on it because of throttle response, etc. ...quick question about that. was the LS1 originally throttle by wire or was the TB cable operated?
EFI is superior to carb in many ways
Carbs also have their plusses
just depends on individual preferences.
going carb because its more "period correct" is also a poor reason to put a carb on an LS1 swapped vehicle. if you wanted "period correct" you would also get a block from that same period
at the end of the day, an engine doesnt care how it gets its gasoline into the cylinders, just as long as it gets in there when its supposed to be there, but technology allows incredible, safe, easy and automatic control over the basic functions of the engine.
a question to the fellow who prefers his carb'd ls1 to the efi that was originally on it because of throttle response, etc. ...quick question about that. was the LS1 originally throttle by wire or was the TB cable operated?
06-17-2008, 08:40 PM
#50
Carburetor introduces fuel before intake giving the entire length of the intake and head runners for fuel to atomize. The EFI setup only allows the length of the cylinder head runners resulting is less atomization. Carburetors run at 7psi. A very low fuel pressure which means cooler fuel which means cooler air/fuel mixture. EFI has fuel presurized to 50+psi which is obtained by more friction which creates more heat.
With a carburetor this is a much shorter distance for the air to travel as well. You dont need the 6" of spacing from MAF to TB and then whatever distance to air filter. It's also a straight shot from the top of the engine down into the cylinder heads. It does not come in and 90* into the cylinder heads. You also dont have to worry about the 'dead' #7and#8 cylinders or nitrous backfires. A nitrous setup is also much simpler/safer to run on a carbed setup.
With a carburetor this is a much shorter distance for the air to travel as well. You dont need the 6" of spacing from MAF to TB and then whatever distance to air filter. It's also a straight shot from the top of the engine down into the cylinder heads. It does not come in and 90* into the cylinder heads. You also dont have to worry about the 'dead' #7and#8 cylinders or nitrous backfires. A nitrous setup is also much simpler/safer to run on a carbed setup.
06-17-2008, 08:53 PM
#52
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Why even put an LSx in a car if your going to carb it. Why not get a SBC or BBC instead. Not that I am knocking carb setups it just doesnt make sense to Carb an engine designed for EFI.....
06-17-2008, 11:11 PM
#56
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Not sure where you are getting it done, but Ed Wright is here in Tulsa and I think he charges $650 and there is a guy named Glenn in OKC that is really good and really reasonable. Glenn is on here quite a bit.
06-18-2008, 01:16 AM
#58
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i swapped out a six for my carbed LS2, i bought it as a crate motor so it came with the intake , i did it because thats what i wanted , it drives great , check my link for a view..
carb vs efi
carb vs efi
06-18-2008, 01:37 AM
#59
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Ease of tuning and throttle response cant be touched of fuel injection. If you guys realized how easy it is to tune yall wouldnt be saying this. If you can turn a computer on and open a program, then you can learn to tune. I have efi live and had no experience tuning and learned in a couple of weeks.