Reply to "spark timing"

rockyMember

That could be someone's "Static Timing Mark".

I don't know what year your car is, or the configuration of the motor, but....

From a good friend of mine.....

quote:
The '71 engines are "different" from the '72 and later. '71 has quench chambers, 11:1 C/R (advertised), and a different camshaft. They run 6* initial advance and 800 rpm idle speed.

In '72, they had open chamber heads, 8.8:1 C/R (advertised), and a "hotter" camshaft. That cam was an attempt to regain some of the HP that was lost due to the change in combustion chamber design and the huge drop in C/R. Those engines run 16* initial advance and 1,000 rpm idle speed.

From the same source..... I won't say his name, but his initials are jb1490...

Rocky

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