'not detonating with regularity'....

nm9stheham said

Well, you can't say that the FSM does not say what it says... it is right there in B&W: 1965 Plymouth FSM. I don't know what to think..... the FSM and my experience say one thing, you say something completely different... For the life of me, I can't figure out the reason for the difference.

You're talking about cranking compression in PSI, right? Stock factory pistons that came in cars sold off of the showroom floor, or did you have some sort of different high CR pistons in there for drag racing? Running a high octane fuel mix maybe? Just trying to make sense of this....tnx.

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Yes , all the plugs out cranking by battery till the needle quits moving , usually about 3 maybe 4 rotations ---------.
Factory 68 roadrunner hemi, had 13,000 on it when I first bought the drivetrain . The hemi`s seemed to have a descretion in piston height and compression ratio`s , in what the factory and the nhra stated.
For legal nhra racing they had a set maximun piston height , it was pretty weired compared to a stock hemi , and I cant explain it .
Don't care what the manuals say , experience is the real deal to me -------I didn't get to check the second st. hemi , it was a basket case when I bought the satellite it belonged to.
The solid lifter /stock cam only had .495 lift. In a 3900# belevedere it was pretty stout , we tried running stock class with it first = 7" tires , that was a joke !