I'm currently rebuilding two engines. #1, AMC (Jeep) I-6, ohv, 2 valve, significant squish #2, Ford Zetec I-4, dohc, 4 valve, minimal squish Along with those obvious differences I notice significant differences in bore/stroke ratios and con rod/stroke ratios. #1, B/S = 1.12/1, R/S = 1.8/1 #2, B/S = .96/1, R/S = 1.55/1 Reading all that is here leads me to believe that engine #1 will benefit more from grooving than engine #2. However, some further thoughts- From a theoretical point of view, I think grooving would make a greater difference in an engine with a smaller R/S ratio, because of the more rapid piston movement right before and after TDC. Theoretical engine benefit advantage: engine #2. But I would also think that grooving would make more difference with a higher B/S ratio, because of the longer flame distance to stroke ratio. Theoretical benefit advantage: engine #1. I'm not sure where to go with these thoughts, but I think they do open up areas of consideration for evaluating the success of grooving engines in the future. Anybody have thoughts on this?
The administrator has disabled public write access.
Re:grooves re: bore/stroke, rod/stroke ratios
Date: 2008/11/06 05:26
By: trevor
Status:
Karma: 1
Yes I have two thoughts....
1. What about the thousands of heads already grooved?
2. To much thinking and not enough grooving going on.....you are not blazing any trails just following the masses...
TH
The administrator has disabled public write access.
Forums
::click!::