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Bump Timing

Discussion in 'Engine Building' started by randerson165, Jun 26, 2003.

  1. randerson165

    randerson165 Senior Member

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    I have a few things done to my car (In my signature). I am replacing the head tomorrow morning with a non-warped one and the guy who did my engine before said I have advanced timing. How do I set the timing on my car so that it is advanced ? Do I adjust it with the cam gear set to 0 and then adjust my cam gear a few degrees ? Please Help.
     
  2. randerson165

    randerson165 Senior Member

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    anybody, please ? Or at least tell me where I can read about it....
     
  3. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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    PM...



    Twenty three minutes hardly constitutes "nobody seems to know" does it? Be a little more patient.

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    Advance- rotate cam toward front of car
    Retard- rotate cam toward firewall

    Don't overdo it... you don't want to slap your valves into your pistons. Or maybe you want to- it's up to you. I would leave your timing stock until you get to a dyno to tune it, and are able to check for clearances also.
     
  4. randerson165

    randerson165 Senior Member

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    So what does having an adjustable cam gear do ? If I set the cam gear at 0 and set my timing to factory, then what does adjusting the cam gear do ? Its set at like +2 or +3 marks.
     
  5. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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    On a DOHC engine, it allows you to vary the overlap and cam timing. On a SOHC engine, you advance and retard at the same time (intake vs exhaust) so you effectively move the power band around in the rev range.

    Ignition timing and camshaft timing are two totally separate things.
     
  6. randerson165

    randerson165 Senior Member

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    Thanks for clearing that up. So with my cam gear on there. do I leave it set at +2 or +3 degrees and just put it on my new head like that ?
     
  7. JDMilan

    JDMilan Senior Member

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    You've got mail.
     
  8. randerson165

    randerson165 Senior Member

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    I didn't get a PM...???
     
  9. randerson165

    randerson165 Senior Member

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  10. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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    If it worked fine on the old head, and your new head is the same, it'll work on the new head. I would personally set it to zero until you get it on a dyno.
     
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