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1985 Chevy TPI 5.0 swap

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  • 1985 Chevy TPI 5.0 swap

    Where to start? We bought a 36 Chevy coupe to restore. It seemed to start as a restore to a newer daily driver with the TPI engine. Its not a bad looking engine and injection system for the car to tell the truth. It looks like it came from a salvage camaro, all the wiring is there, computer, with the fuel lines and exhaust hacked off like it came from a junkyard though. Its got the 700R4 trans and a ford rear end.

    Thing is, that motor had around 250 horsepower if it was lucky in 1985. Its a light enough car, all new tubular frame has been done with the basic mustang II front end, that shouldnt need that much power to turn heads, but how far can you go on a rebuild with the computer. I see guys running either 19 or 22 pound injectors on that combination, but how far can we go on compression and cam to get more out of the motor without that much computer knowledge? I bought the ACCEL performance fuel injectors to put on a lumina we were working on and kept misfiring due to too much fuel. Just figured fuel trim and such would need to be programmed to get them to run properly.

    Anyone have any experience with this type of swap or since there isnt much computer knowledge here should we just get a stock rebuild kit and be happy with some exhaust pipe rumble instead of some cam rumble?

  • #2
    The intake won't flow a lot of air, if you hot rod the engine. You're probably better off leaving it stock. If you want to go fast, and you don't want to get into knowing all about EFI, then just put a carb on it.

    If you want to get into knowing all about EFI, you can get plenty of help here. There's a lot to learn, though.
    My fabulous web page

    "If it don't go, chrome it!" --Stroker McGurk

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    • #3
      Check out http://www.amazon.com/s/ref=nb_sb_ss...rt%2Caps%2C240

      The John Baechtel book was my Bible on the subject, it really clarified a lot of stuff. He may tell you that '85 is not the best year but I'm sure it's workable. I'd leave it stock in any event. Disclaimer: I never did get my own tpi project running (CA smog-legal '86 305 into a '79 El Camino, I did all the stock wiring integration as I refused to buy a kit and wanted the education instead), so what do I know... I may yet...
      ...

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      • #4
        The computer will tolerate most bolt-ons but a cam or head change will result in needing a new chip burned.
        Hard Work Guarantees Nothing - Lack of it Does!

        Drew Gerth - Newburgh, IN

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        • #5
          Originally posted by Loren View Post
          Check out http://www.amazon.com/s/ref=nb_sb_ss...rt%2Caps%2C240

          The John Baechtel book was my Bible on the subject, it really clarified a lot of stuff. He may tell you that '85 is not the best year but I'm sure it's workable. I'd leave it stock in any event. Disclaimer: I never did get my own tpi project running (CA smog-legal '86 305 into a '79 El Camino, I did all the stock wiring integration as I refused to buy a kit and wanted the education instead), so what do I know... I may yet...
          I do have that first book, need to read it closer I guess. Just thought there were some ideas others had here or someone who tried and thought it was a terrible idea.

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          • #6
            I did one of these swaps with an 86 vette engine, using an early 90s Fbody computer, about 15 years ago. It worked ok, but if I had to do it today I'd definitely go with a megasquirt. It hadn't been invented yet.
            My fabulous web page

            "If it don't go, chrome it!" --Stroker McGurk

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