High compression blues.

I'm still struggling with your gauge pressure.
The heads are listed at 78cc
... gasket maths out to 10.9cc
.....IC-968 eyebrows at 4.4cc
estimating the deck at -1.1cc
Totals.........................92.2cc

So with a 4.35x3.75 having a swept of 913cc, then
(913+92.2)/92.2 =10.9Scr I get that this is reasonably possible. And probably correct.
But now with that 292/296/108 cam in at 107* for an ICA of 73*
The Wallace kicks out; 10.9Scr/8.0Dcr/160psi/152VP
and IMO, no matter how badly the install might be, it could never approach 200psi....and still run. Even in at 102* the pressure has only climbed to 170.
Soooooooooo, am I out in left field here?

The reason I ask is, if you slam a bigger cam in there and the Wallace is right, and the pressure falls to say 155, ......... how is that gonna translate to the trap speed?
I mean many of us SBMers are running 185psi with aluminum heads and no detonation. A few, or several are pushing 200 or better, still on pump gas...according to a survey I took many months ago.

So, if the Wallace is correct..... is there some other factor, that could be causing the light-ping..or the sound of it, or a sound LIKE it??
I have to think of the possibility that it might be pre-ignition, because that can occur at almost any pressure. and I think someone touched on that already.Yeah that was Inertia in post 78

Respectfully,AJ