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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