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LQ4 with 853 heads need some info

This is a discussion on LQ4 with 853 heads need some info within the Internal Engine forums, part of the LSx Technical Help Section category; I have a LQ4 with 853 heads and was wondering what my compression will be. I have stock heads and ...

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    LQ4 with 853 heads need some info

    I have a LQ4 with 853 heads and was wondering what my compression will be. I have stock heads and stock pistons. I am trying to get 450hp to the wheels pretty cheap. I know 853 aren't great but they were $35. My cam is a comp cams 222/224 112 and cometic .40 gaskets. Any guesses to the hp this should make? I am also switching to LS6 intake t body.

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    stock 853 casting? 222/224? LS6 intake? Your will not hit your 450 rwhp goal. Not close.

    My LQ4.
    862 casting,Lingenfelter CNC'd heads milled to 56 CC (5.3 liter)
    FAST 92/92
    Kooks 1 7/8 full exhuast
    with a 230/236

    Im hoping for 450 rwhp. Dont think you hit the mark your hoping for. Ported heads, slightly milled, and a larger cam... + a FAST 90/92 will gte you there.
    370 CI - Twin 6766 Turbo - Jakes stage 5 4L80E - MWC 9" - Holley Dominator

    Build in progress...

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    ok thanks. This combo was started with running ported 317 heads and a pt-88 turbo for a pump gas 600hp setup but funds are to tight. any chance for 375hp? If not where do you think it will end up being?

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    With a full exhuast (Long tubes and TD's or nice y pipe and cat back) and your LS6 intake, with your 224 cam. You might be right around 400. Give or take.

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    what will the compression be? 10.1?

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