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Old 10-23-2017, 07:24 PM   #110
goinbroke2
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Join Date: Mar 2002
Location: NS CANADA
Posts: 578
Default Re: '67 El Camino H/SA

If everything is correct (balancer/marker/etc) I'm wondering if being a stocker cam on a less than ideal shortblock is producing low cyl pressure and the timing advanced that far is making up for it? As the rpm goes up, the better the cam breathes (less overlap losses of cyl pressure) and it gradually gets back to what is considered normal at 36*?

I'm thinking a tight ring package and decked block so the quench area is ideal and higher static compression would produce more cyl pressure and require less advance on the bottom?

What is the cranking pressure?
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