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  1. #1
    Registered User freddy914's Avatar
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    supercharge K24/k20a2?

    i was thinking of supercharging my k24a1 with 11:5:1 comp.pistons and k20a2 head with stage 2 cams.. would the jrsc race kit be to much boost or should i stick with street kit..

  2. #2
    Moderator=>PM 4 Help MugenReplica's Avatar
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    Quote Originally Posted by jimmyjames View Post
    Higher compression pistons and boost has never proven to be a great combination. Typically, you will want to run LOWER compression pistons with boost. Differences in piston compression account for maybe 10% at the most of the useable power. With such a high compression, you will have a hard time tuning out knock as well as wearing out rings and valve seals quickly.

    Look into the piston makers and see the compressions on their boost-specific products. You will find 8-10.5:1 range. N/A pistons are like 11-12:1.

    Because the engine is boosted, a higher compression is no longer necessary as the forced air provides more than enough positive pressure for kick-ass combustion.
    Quoted for JimmyJames...

  3. #3
    Registered User freddy914's Avatar
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    Quote Originally Posted by MugenReplica View Post
    Quoted for JimmyJames...
    thanx for the info.

  4. #4
    UKDM > JDM jimmyjames's Avatar
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    To add, what you're proposing is called a "poor man's TSX"
    You can find an overview of the whole process here;
    http://www.sportcompactcarweb.com/te...ead/index.html

    In that article, they wisely stayed with the stock 9.6:1 pistons.
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  5. #5
    ephatch member si4life's Avatar
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    Great info on that link. Thanks!


    Quote Originally Posted by jimmyjames View Post
    To add, what you're proposing is called a "poor man's TSX"
    You can find an overview of the whole process here;
    http://www.sportcompactcarweb.com/te...ead/index.html

    In that article, they wisely stayed with the stock 9.6:1 pistons.

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