That is really good info and makes perfect sense. First time I had heard that angle on the 302 heads. It just keeps getting better and better. Thanks for posting that up !
Dang George,
Check it out...any closed chamber head takes less timing than an open chamber because with an open chamber=more area=needs earlier ignition to burn it in the same amount of time . Flame travel . A to b , now shorten the distance, hence fast burn/closed chamber, When they say fast burn, that's because the chamber is smaller, more compact, A to B is shorter/less distance to the plug everything's being shoved towards as well... as the piston gets closer to the closed side of the chamber the a/f does get goosed/reanimated as I like to say less prone to pre ignition as its swished towards the ignition point. The tighter you make that quench...the faster it will burn. Makes for a really efficient motor.. if you dont beat the heads up with the piston crowns..It's great stuff, needs other pieces to be fully realized of course.
However If the piston is .080 away..they're just a compression bump is all.
I may not explain it scientifically as some engineer knot head might.. but hope you get it. Lol
