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Old 07-04-2005, 04:09 PM
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Join Date: Jun 2004
Location: Huntington, VT
Cobra Make, Engine: E-M 427 Top Oiler stroked to 482 by KC, Stage 2 heads, a Quikfuel and Voila, 640 hp
Posts: 502
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Default 427 running rich

I have a 427 center oiler that is running very rich. A few questions for you guys:

1. Demon says too high fuel pressure can cause this. I have a 650 CFM road Demon on this motor and the pressure gauge indicates ~10 PSI when it's idling. Is this OK? (BTW 650 is not too small according to Barry Grant's formula)
2. This motor came with a NOX setup. I don't drag the car and won't use the NOX for fear of toasting this '64 iron block. Could this be the reason for the rich condition, even though I never use it?
3. This motor is stout and runs well except for the rich condition but here's a real mystery to me: It has a timing notch on the dampner but no pointer or degree marks anywhere. I've had it up on the lift and there is no place to reference the notch. How the heck do I time this thing once I adjust the A/F ratio??? I'm going to take it to a chasis dyno but without finding absolute TDC and using a timing light with the dial, I'm at a loss. Is it common not to have a pointer?

Thanks

Tim
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