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  • #1

    Piston to Valve Clearence

    Does anybody know where we can purchase a 1.5 rocker for our cars? I dont think I need too but I am just concerned that I may have piston to valve clearence issues with the new cam. My head is milled which will have less clearence right? Also my cam specs are 218/218 .528/.528@1.6 113lsa. Do you think im safe? Magnus did you ever measure piston to valve clearence on your 212/212 cam? Just in case I have issues I would like to know I can easily get a 1.5 rocker.

    Whats the highest lift and duration cam that you have heard somebody using on our engines with no Piston to valve clearence issues?
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  • #2
    yoru gonna loose about .02-.03 of lift by goin to a 1.5...
    <b>Black</b> 1998 Pontiac <i>Firebird</i> A-4 swap<br />271.4rwhp/259.4rwtq NA<br />13.30@102.44 <br /><a href=\"http://www.freewebs.com/wickedsix98\" target=\"_blank\">www.freewebs.com/wickedsix98</a>

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    • #3
      how much are your heads milled?
      Keith - Chicago<br /><a href=\"http://www.hptuners.com\" target=\"_blank\">HP Tuners - PCM Reprogramming</a><br /><a href=\"http://www.dxsoftware.com/magnus/\" target=\"_blank\">97 Firebird V6 to LS1 swap</a><br /><b>V8 9.967@132.78</b> 1.322 60\' NA Heads/Cam<br /><b>V8 10.295@128.48</b> 1.363 60\' NA Cam Only<br /><b>V8 10.987@119.31</b> 1.422 60\' NA Stock Internals<br /><b>V6 13.674@98.22</b> NA<br /><b>V6 12.394@104.91</b> N20 100HP

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      • #4
        <blockquote>quote:</font><hr>Originally posted by Magnus:
        how much are your heads milled?<hr></blockquote>

        20 thousanths

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        • #5
          how about me will i have problems my cam specs are 210/220 .533/.533 115lsa
          <b><a href=\"http://www.sick-sixx.com\" target=\"_blank\">SICK-SIXX MEMBER</a></b><br />NA 14.345 with a 1.863 60 foot<br />Nitrous 13.03@99.5 with a 1.63 60 foot<br /><br />2000 Camaro 3.8L A4: USE TO HAVE Comp Cam 210/220 .535/.547 113lsa 111 I/C, Port and Polished Heads, NX Wet Kit 100 Shot, CPRA made by CP, RK Sport Headers

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          • #6
            You both should be fine.

            Some GTP guys run 222 durations nearing .600 lift.
            Keith - Chicago<br /><a href=\"http://www.hptuners.com\" target=\"_blank\">HP Tuners - PCM Reprogramming</a><br /><a href=\"http://www.dxsoftware.com/magnus/\" target=\"_blank\">97 Firebird V6 to LS1 swap</a><br /><b>V8 9.967@132.78</b> 1.322 60\' NA Heads/Cam<br /><b>V8 10.295@128.48</b> 1.363 60\' NA Cam Only<br /><b>V8 10.987@119.31</b> 1.422 60\' NA Stock Internals<br /><b>V6 13.674@98.22</b> NA<br /><b>V6 12.394@104.91</b> N20 100HP

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            • #7
              Sweet. Now I just wish the darn thing would get here. I hate waiting on compcams.

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