Originally Posted By RapidusMaximus
Originally Posted By Alan Prusiensky
Originally Posted By Alan Prusiensky
Originally Posted By moparmitch
Whats the bore and stroke of a typical pro stock engine?

Do you have a minimum bob weight you need to have?

Thanks for joining the forum!
my bore is 4.733 and my stroke is 3.55. I would like to try a 4.75 bore combo but my budget just isn't going let me.i think alot of teams run 4.75 bore motors.
I run steel rods so we aren't close to the min. Bob wt rule.

I'm a little shocked that you run steel rods...I would have thought aluminum would have free'd up a little hp...is this more of a longevity issue?


They have been running steel rods for years now. They is an interesting topic on YellowBullet that Nick Ferri chimes in on quite often, it's in the Normally Aspirated engine section

Alan Jones