69 Z28 Timing - The Supercar Registry

#15

10-24-2008, 07:25 AM

Gary L

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Join Date: Nov 2007

Location: Clovis California

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Re: 69 Z28 Timing

I have a stock built 302. The mech advance is 18* and the initial is 18* all in by 2800 RPM. I also have 15* of full vacuum advance. This is on 92 octane. The 30-30 cam needs alot of timing to run best. I also have the primary jets at #72 with headers. Plowman is correct. I have a Crane cam that limits the vacuum advance. Full vacuum advance allows leam mixtures (at idle and cruise) time to ignite and lets the engine run cooler.

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