upgrade to 350.CI.what could go wrong

Discussion in '1978 - 1981 Specific' started by WILLIAM FLYNN, Mar 5, 2021.

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  1. WILLIAM FLYNN

    WILLIAM FLYNN Member

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    81 Z28 T-tops ,computer car ,if i swap to a 350,different carb & double the horsepower ,will it affect the car/computer?
    ive already pull the check engine bulb.
     
  2. Gary S

    Gary S Administrator Lifetime Gold Member

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    You will also need a different distributor, and if the car has an auto tranny, the lockup torque converter likely won't work.

    You can keep the original carb, distributor, and computer and just swap the engine from 305 to 350 however.
     
  3. biker

    biker Veteran Member

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    Tires. If you upgrade to a good 10:1 350 with cam, heads, intake, headers and eliminate the computer controls, you will burn through lots of tires. That's what will go wrong.
     
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  4. WILLIAM FLYNN

    WILLIAM FLYNN Member

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    thx Gary,4speed car ,forgot distributor,thats a must!
    figuring like a west coast engine fully done
     
  5. RickM

    RickM Veteran Member

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    It all depends on the computer. Are you keeping it?

    If so you need to have the computer controlled carb and computer controlled distributor.

    You will also need to change the computers prom to match the engine. You will need a prom that is engineered for a 350.

    If you are ditching the computer just get a non computer carb and distributor.

    Also if you are ditching the computer you can remove the computer wiring harness, the computer controlled temp sensor, heat riser TVS switch and heat riser, egr solenoids, speed sensor and smog pump diverter valve and smog pump.

    Unless you understand how the CCC system works you are probably better off ditching it.

    RIckM
     
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