What would you build if limited to 372ci - with boost as an option

Sorry, what are you asking?


Sorry, I read that wrong. That is a very long piston was my point.

There was always an issue with Chrysler stuff and the tall decks relative to stroke length verses GM garbage.

Not only do you end up with a long piston for equal displacement you end up with longer pushrods.

If you are trying to be competitive with relatively short stroke engines you need to consider things like pin height and pushrod length.

If it’s class racing then RPM matters. Long pistons and long(er) pushrods (compared to other engines and their architecture) make it that much harder to get rpm.

I know (going off my memory) a 3.313 stroke piston has a 1.85ish pin height.

At 7500 everything looked good as far as the piston was concerned. At 8000 the skirts would look a bit strange like I was running too much clearance. We started beating up ring grooves too.

So I decided to tighten up my piston clearance. Sneaking up on it you could feel it starting to grab the pistons.

So I adjusted the clearance a bit looser but decided 8500 was better (it was and still is better) and then you could see the piston rock beating up the tops of the bored.

So I went to .043 rings and gas ported pistons to try and save the ring grooves from getting beat up. I could never get the clearance where I wanted it.

Class racing isn’t cheap. Competitive class racing is expensive and labor intensive.

I just want you to think about how one thing (like destroking) can and will affect many things. Sometimes things you may not know until you get the engine built and then you end up like my dumb *** buying more pistons than I wanted to.

Chrysler made this short deck small block for a reason.

If you are trying to compete with equal displacement engines with short strokes and you have a 9.5 deck and the other guy has a 9 inch deck (my numbers are just for discussion) you will have a hard time being competitive.

If you get competitive and then someone gets more rpm you are screwed again.

Someday I’ll recount a AS/GS legal story I have. Because that very thing happened. I just happened to be with a car at the track when the dude running more rpm showed up.

It was exactly what I’m saying here.