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Tuner
It's the time between when the intake valve opens and the exhaust valve closes. Still your map sensor at idle thinks you're at wot.
Last edited by MarcusMilner; 01-14-2019 at 06:45 AM.
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Tuner in Training
No no I know what overlap is. It's the degrees of crank rotation that both the intake and exhaust valves are both open. I meant what formula is used to figure it out from the specs lol.
I agree that the MAP shows very little vacuum but since I've not touched these before I figured it was just how this cam idled lol.
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Tuner
Ok, lol. Do you have the card for that cam?
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Tuner in Training
I don't unfortunately. It's an old thunder racing raptor is what it's called.
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Tuner in Training
Must be a vaccum leak then. He told me he'd rather let me kick him in the head than to have to take the intake manifold off lol.
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Tuner
I've used this site for calcs before, they have anything you can think of. http://wallaceracing.com/Calculators.htm Sucks to be him lol. Kick him in the head just because.lol
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Tuner in Training
Yep thanks, the cam has 17 degrees overlap according to that calculator, cool.
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Potential Tuner
wouldn't an exhaust leak create this kind of mayhem? Have you checked the header flange or collector for a leak?
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With the B1S1 staying over 775 MV for over 165 sec, check for code P0132. You need to diagnose the B1S1 O2 for a short to voltage to the high signal circuit. Possibly a bad B1S1 O2, try swapping them side to side. Could also be a bad PCM.
Russ Kemp