stroker piston pin height

[mountaineerjeff]

so Ive been told to be leery of using stroker pistons, because of the pin being moved into the oil ring land. any ill effects of this?

 

[delta448]

The oil ring only controls the amount of oil film on the cylinder walls, it does not hold combustion pressure whatsoever. There aren't any real substantial drawbacks to using a shorter compression height piston with a longer stroke or rod (or both). If the piston skirt is also short and the piston is made of a material that requires a large PTW clearance to account for thermal expansion, there may be more piston slap and irregular cylinder wear. Shortening the compression height of a piston does inherently weaken its design by a very small amount, but it saves weight and therefore reduces tensile stress on rods and rod fasteners.

 

[mountaineerjeff]

ok, unfortunatly i dont have alot of info on the other side of this argument, but I have definitely been told that there are drawbacks to moving the pin height upward. this would be used on a long rod motor, so that should take care of piston slap and horizontal wear associated with strokers correct? Im just looking at building a motor that will last a long time. and i dont want a problem that arose simply because I decided to move or not move the piston height