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LT4 questions

This is a discussion on LT4 questions within the LT1 forums, part of the Vehicle Specific category; Well since im on a budget and smog restrictions, i want to do the LT4 hotcam, with LT4 intake manifold, ...

  1. #1
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    06 GTO

    LT4 questions

    Well since im on a budget and smog restrictions, i want to do the LT4 hotcam, with LT4 intake manifold, and port and polish the stock heads, then probably a 75 shot of nitrous. Has anybody done the LT4 conversion, and what kind of numbers did you get. Please nobody come in here and tell me how horrible the LT4 kit is, i have already heard it all, just wondering about numbers.
    97 t/a
    Magnaflow catback, K&N FIPK, chrome 17x9.5 zr1's, 3.42 gears, full pioneer sound system



    cavpat; 100 the first race, he wanted to go AGAIN for another $100? LMFAO
    What do you tell a ricer that's out $200?
    ...Nothin, you done told him twice! LOL

  2. #2
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    red
    95 Z28

    An LT4 intake manifold will not easily match up with your stock LT1 heads. You'd be better off port matching your stock LT1 manifold, or using the LT4 heads and intake. Bolt on cars with the hotcam and untouched LT1 heads have gotten to 335-340rwhp in 6 speed cars. With stock LT4 heads you could probably expect another 15 or so horsepower. With ported LT4 heads, 355-370rwhp seems attainable, maybe a bit more.

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    06 GTO

    awesome, thank you for the response.

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