max compression on pump gas\steel cylinder head\241 @ 50 cam

when you have a smaller combustion area,it's herded into a smaller more controllable area which mixes 'still'-from squish -it's burns faster/more even-takes less time, less need to for earlier ignition timing to get all spent.
Larger 'open chamber' is the opposite, except at the point the octane no longer resists combustion 'beyond it's compressible/combustible limit' and pre ignites where ever in the chamber space it wants [hot spots-sharp edges], & however early and then crashes into the flame front/ignition caused by the spark plug-2 fronts crashing into each other,pre ignition

this why I say to cut the chamber to the bore size, because the damn chamber edges hang out into the bore and become...'hot spots'.

A few others including myself seem to be the only people doing this, hmmmm....that sux for the rest who aren't getting it yet.

dave, you say the magic # is 34-36*, but then say as long as you mix the fuel super duper you make more power and need less timing to make max power.
See, when the fuel is better mixed/homogenous, it burns faster which will put the psi on piston sooner=less timing required.

Funny how all my engines run best with only 32*...

And btw, I heard 15* or just after TDC, buts whats a few degrees...lol

'tubulence' also mixes, but there is a fine line and from where it starts.

compression also does some mixing, the more compression , the less need to intro more turbulence , and we talking about raising the compression.
I wonder how much port induced swirl is going on in a nascar motor.
Any rpm beyond idle and you can bet there is plenty of velocity.

Cooler fuel-denser , but what if it's hot/thin air out? lean it some, I see not much there when it comes to keeping the ping monster away, but I work areas before that..

to me, timing is combo specific, I do agree there is a window of a generalized setting, but for the most part, what happens as you raise the timing-rpm/speed go's up=I think thats hp. I mean john doe's 7.9-1 318 likes 38* total, while jane doe's 9.2-1 318 likes 32*-lower compression =less cylinder turbulence 'at least on that end' longer to burn it all.
Just thinking out loud here, bouncing some sht around n such..