Originally Posted by
thomasfouraker
I appreciate the reply.
Never heard that about the snap on scanners. Seems odd that it would read backwards. I will try to get it to 0. I imagine that clockwise would advance and counter clockwise would retard?
I didn't know Keith Black pistons were bad. I had read that had the highest amount of silicon in their alloy content which made them one of the better hypereutecnics available.
Also as far as compression goes, it seems my research told me to keep my dynamic ration at less than 8.0:1 for pump gas. I am right there with my static compression and my current cam.
Perhaps this is archaic literature and I read too much! It does seem that many people are running well over 10.5:1 on magnum motors with pump gas without problems. I believe too that most people are making a general guess at their compression when they say what it is. Piston dish, Cylinder head CC, head gasket thickness, piston to deck, gasket bore, top ring land depth......short of taking every single one of these measurements I think a lot of people could be off from what they think.
I have heard of one 408 from PIE that has some pinging at 10.5:1 with aluminum Edelbrock heads but that could be the fuel or timing of course.
Had to purchase a computer and have HP Tuners coming next week so I will begin the journey of learning to tune.