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Originally Posted by h2odiesel
I guess only Bert can say what he means since he is advocating this. If he is talking 4 at the cam 8 at the crank I'd begin to wonder about interference valve to piston. especially at high rpms. Those spring are not that stout and valve float may be a possiblity
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Well to make sure Bert sees this I will bump it ....I am assuming he means 4 degrees at the crank......but if I am going to the bother I want to do it right.
Of course the actual offset would be dependent of whatever correction you need to get the cam timing to spec as I understand in production these varied more than a little.
So the 4 degrees should be advanced from spec if the motor was dead on with the timing already.