With a 13cc piston, 60cc head volume, 4.06 bore, 4.00 stroke, 6.123 rod, 0 deck height, .035 gasket.
At 11.5:1 compression, what are you trying to achieve by taking on the expenditure of a custom piston.
That's why I asked here. You guys know more than I do.
Thing is I won't know. Can't afford to test pistons shape to verify. Off the shelf it is.
Your last statement makes total sense. I'm probably overthinking everything.
Nothing wrong with inquiring about other members experiences.
That's a stretch, at least for me. What I DO know is, it wouldn't be worth it for ME. Now, maybe racing for points and money...maybe. But I'd need to see firm proof on a dyno and the difference would need to be a lot. While I believe some improvement is possible, that's splittin hairs in my book. lol
I watch lots of videos of engine builders whom I think know what they're talking about based on their documented experience. Ford guy Ben Alameda suggests running pistons that mimic the combustion chamber. A local Mopar racer who dynoed my engine had custom pistons made for a 440" small block years ago. I just want to make the best of my engine when I re do it. Probably not worth it for me either.
There is validity in your theory.
Add 10* of duration. Your not going to notice the difference on the bottom end with the 4" arm.
Yeah that Ford guy brought it up because Ford found some good gains with the Cleveland engine R&D. The 1971 BOSS 351 had 11.3:1 compression using the closed chamber Cleveland head with pistons that had exact domes that fit the closed chamber head perfectly. Had Ford not stupidly used retarded camshaft timing, and had they introduced it five years prior, that engine couldda been a Hemi killer.
A quench dome, maybe?
I'll probably end up running a shallow dish. Wiseco has one but it's .015 in the hole with my deck height. I'd rather not cut my block .015 to use them. Mahle has a 16cc dish I'm looking at.
