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Rules on high compression and n2o

Discussion in 'Engine Building' started by jordan, Sep 12, 2003.

  1. jordan

    jordan Senior Member

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    ok i am gonna be getting an ls motor. i have been planning on high compression but someone said that with high compression i cant use n2o. i am gonna have the head ported and polished and get the crower 403 cams. i want to use b16 pistons to bring up the compression. now if i have a 12.5 or more compression to 1. how big of a n2o shot can i safely use?
     
  2. pissedoffsol

    pissedoffsol RETIRED

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    depends. there is no set number.

    nitrous needs fuel. what kinda of fuel delivery are you planning to run?
     
  3. pissedoffsol

    pissedoffsol RETIRED

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    and this has nothing to do with a swap. moving to engine buidling./
     
  4. jordan

    jordan Senior Member

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    yeah sorry about posting it in wrong forum, i wasnt paying attention. i am planning on upgrading the fuel system. i am gonna get a biiger fuel pump run all new lines(bigger) bigger fuel rails. i will more then likely get a SAFC. but my question is once i have my motor built if i have like a 12.5:1 compression ration can i use a 150 shot of n2o?
     
  5. saturn_boy96

    saturn_boy96 88 C1V1C 53D4N DR1V3R

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    i am just gonna throw this out there. if you okan to run more than a 75 shot, don't get any higher compression than 11:1, unless you have dyno time and good(thats read aem ems, or hondata) fuel management.

    just my $.02
     
  6. gocivicls

    gocivicls Senior Member

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    :eek: Maybe I'm wrong, but unless you get the head milled you will never see
    12.5:1 cr with B16 pistons in an LS. I have got (CTR pistons 10.8:1) and with a 2 layer head gasket I am looking at 11.7:1 in my LS.

    See if this clears things up on who has been misled!

    http://www.c-speedracing.com/howto/compcal...lc/compcalc.php
     
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