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Carburretor vs. Fuel injection

This is a discussion on Carburretor vs. Fuel injection within the External Engine forums, part of the LSx Technical Help Section category; I have recently bought a 2006 LS2 crate motor for my 64 Corvette project. I am currently wrestling with the ...

  1. #1
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    Carburretor vs. Fuel injection

    I have recently bought a 2006 LS2 crate motor for my 64 Corvette project. I am currently wrestling with the decision to either stay fuel injected, or switch the motor over to carburreted. It seems to me that the carb solution is not only significantly cheaper, but also a lot less complicated (considerring I have never done EFI before).

    Pro carb. Stock fuel tank, cheap fuel pump and lines. No complicated wiring, no computer.

    Pro EFI, Possibly better performance and economy?

    Wiring kits alone cost more than the Carb set up. Am I missing something?

    Thanks from a new member.

    Trev.

  2. #2
    Ticket to ride Trolleyman's Avatar
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    Did the LS2 come w/ EFI? Carb is a cleaner look.
    Pewter 02 Z28:LS6 cam/LPE CNC heads, NOS 5177, AM4 Transgo w/2600 Yank, SLP goodies, Hoosiers DR, BMR subs./lcr/loop, SLP "Y"/Borla Bear Rotors/Brakes 147000 miles
    motor 334 rwhp, NOS (100 shot) 409 rwhp
    1/8 ("Q") 7.71@92mph, 1.83 60ft (100)
    1/4 (Fontana) 12.38@111.3 (50)

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    LS2 comes with EFI and a drive by wire throttle body (another headache). I am seriously leaning towards the carb setup right now. It just seems so much more user friendly than trying to deal with all the issues.

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    Ticket to ride Trolleyman's Avatar
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    The reason I asked is there a crate engine (LS2) that comes setup for the carb. EFI wiring can run you $1200-1500, I haven’t seen too many for the LS2 so far. Wait one year, the price will come down. I’m looking into a LSX engine for my Fiero.

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    Even though I bought the EFI version, I figure it will still be cheaper to switch back to carb. I can probably get some money back selling the EFI maifold and throttle body.

    Edelbrock Manifold & controller $690.00. Carburettor $400.00 Fuel pump $150.00

    vs. EFI

    Wiring $1,200.00 min, Computer $475.00, Custom fuel tank with in tank pump $600.00+, High pressure fuel lines $?, Switch to cable op throttle body $100.00+, MAF sensor? Air intake $?

  6. #6
    Ticket to ride Trolleyman's Avatar
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    Yeah it’s a tough call. I would stay w/ EFI; in the long run you will be happier. Old Corvette, new Corvette theme. Turn Key can set you up with a system (wiring/ECM) that is speed density, no need for the MAF. A new fuel system in the car that old is a good thing. Good luck

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    would there be any power or economy difference between the 2? I would assume better economy but would the power difference be negligible?

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    Grand Imperial Wizard Sarge's Avatar
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    Carb all the way. Much less headache and much finer tuning.

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    Veteran Hi-Po's Avatar
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    Quote Originally Posted by Sarge View Post
    Carb all the way. Much less headache and much finer tuning.
    Im gonna side here for this one. The only engine ive built was a carbed 350. But i had a free dino to play with. ...I guess i dont know which one i would go with. Both have up and downs.

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    Cool

    I think I would go with the carb. There will be a lot that you can do to the engine yourself as far as tuning,and you want need to run to a shop every time there's a problem with the car not wanting to run.With only the carb. things get a lot simplier to figure out.True there will be better ldling of the engihe in cold weather,but with the right carb and a good tuning of the carb. you will be find.

  11. #11
    Local Idiot Selah's Avatar
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    I say stick with EFI, sure it's more time, money and headache, but that's just par for the course. If it was easy everyone would do it. I would think that because EFI is more efficient than a carb you would get more mpg and power. That's just my screwed up logic though.

    There is also something awesome about seeing a modern EFI engine in an older car, brings the cool factor up alot.

  12. #12
    Member silverz28camaro's Avatar
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    sebring silver
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    go with the carb set up, my freind had a tuned 350 carb motor and dynod

    330hp 345tq

    he did nothing else bu switch to efi from edelbrock and got 326hp and352tq

    the difference is efi give you more tq but hp is lost, drivability is great with efi, but if you have a properly tuned carb there isn;t much difference,

    save the extra thousand or 2 dollars and invest ontp something else,

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