I've searched exhaustively, and haven't found much info on this topic. I'm getting new pistons and I'm considering the raised wrist pin/longer eagle rod combo. Has anyone tried this combo for any length of time? My math indicates a mere .04 increase in R/S ratio from 1.581 to 1.622, but the cost is not much higher either. I did see one person claim that the raised pin pistons suffered from a weaker structure around the ring lands. Anyone have any input?

 

any better r/s ratio, is good. id go for it!

 

If the wrist pin location bisects the oil control ringland support, don't bother. The drop in sealing capacity is generally regaded as a race possible, street stupid design. Beyond that, it makes a lot more sense to offset the piston pin than just to move it up, as that will make a bigger and more positive difference in rod angularity (and hence dwell times) than pin upward movement.

 

Well stated as always.