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Thread: engine swaps

  1. #1
    CLABORN1960
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    Hello all,
    I am new and looking to get a 80 or 81 vette. My question is this.... I have read that an 81 vette has computer controlled carbueration. Is it possible to put another engine in (I am thinking of having one built) without running into computer problems?

    Any information or feedback will be helpful.... thanks

    Steve

  2. #2
    ssvett
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    Steve, As far as I know there will not be any problem with building another engine for an 81. As long as it is not built too radically for the curent 81 carburetion. I know that you can unhook all that stuff(I've seen this done, but it really looks like crap because of all the wires) It would be easier on an 80, because of the computer. I hope that somone with more 81 experiance will post. I only done this to one 81. It wasn't too hard except hiding all the extra wires.......Steve

  3. #3
    Gone but not forgotten Vette81's Avatar
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    Steve

    The computer installed on the 81 vette controls ignition timing and air-fuel mixture. It can be removed as long as you install a vacuum advance distributor and a different carburetor (non computer). A new exhaust manifolds and removal of the old wiring and plumbing will make things look better, and also removal of the "Check Engine" light bulb would be recommended.

    Darrell

  4. #4
    ssvett
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    Default Opps

    Thanks Darrell, I thought about the light, i just forgot to post it. It is very annoying if you don't remove it.......Steve

  5. #5
    engine swaps DDLS3's Avatar
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    Hi Claborn1960,
    Darrell has hit it straight on. My 81 has been converted as well. No problems, no mess. All the computer hook-ups are neatly tucked into the harness at the top of the firewall. Just a thought...my 81 has headers, true dual exhaust, Accel ignition and a mild cam. I've gained maybe 60-85 horsepower. Makes it really fun to drive and didn't spend a ton of bucks.
    Dale

  6. #6
    rmlentz
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    Default new engine for 81

    Hello,

    I am new here, and I'm sure this subject has been covered well in the past, but... I have an 81 in need of a fresh engine. Could someone point me in the right direction for information? I would like to install a crate motor, such as a ZZ4 or similar. I live in a remote area, and would like to minimize down-time. Thanks, Mike

  7. #7
    Administrator Tom Bryant's Avatar
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    Default Welcome

    rmlentz,
    Welcome to the forum. As you can see from the above posts there is a lot of interest in engine upgrades on the C3s. I think a ZZ4 would be a great choice.
    Tom
    NCRS 1360.............SACC 2082.............C1 Registry..............L81 Registry
    1959 Chevrolet Corvette 1981 Chevrolet Corvette , 350 L81 automatic Frost Beige

  8. #8
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    JUST A QUICK NOTE. I HAD ALSO THOUGHT ABOUT THE ZZ4 BUT IT DOES HAVE ANGLE PLUG HEADS. IN MY CASE THE USE OF THE HOOKER/SIDEPIPES WOULD NOT WORK WITH OUT CHANGING HEADS, WATERPUMP, AND CAN'T REMEMBER WHAT THE THIRD WAS.... WHAT EVER!! IF THE PIPES DON'T MATTER(HHSIDEPIPES)IT'S A GREAT CHOICE!! JCL

  9. #9
    rmlentz
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    thanks tom, JCL, for your input. Looking at GM Performance Parts Catalog, looks like I will need a flywheel for 3" bolt pattern (4-speed), and just looking at stock exhaust, looks like angled plugs will be OK. Will get the engine ordered if no one has a reason why not in next couple of days. Thanks again.....Mike

  10. #10
    Administrator Yoda's Avatar
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    Default rmlentz Welcome to The Corvette Action Center

    Mike,
    Glad to see you made it, hope you get the information you needed. Did I mention that well like pictures . We have a Members' Rides section to post a picture. If you need any help or have any suggestions please let us know. Enjoy the experience

    BudD

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