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Total advance, please chime in

I've read that 32-34 degrees is max advance for a normal Cleveland. My engine builder (408 stroker) says max 28 degrees, so that's what I run. Just read a post here where someone suggested 38 degrees. Does anybody know more?

How much total advance do you run? And please, don't get me wrong, but only chime in if you have actually measured your advance with a quality timing gun at or above 4000 rpm. If you only think you have this and this advance based on a the manufacturers claims on his curve, it's not valid data.


And of course only chime in if your engine runs w/o pinging and has run for many miles.
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