Quote: The tight skirt area is a concern with stock and after market blocks.This is an area that traps oil around the rotateing assembly and cause a lot of oil to be thrown on the cylinder walls and cam.This area is the cause of some of the loss of oil pressure at the big end.The Indy wide pan blocks allows the oil to migrate further away from the rotateing assembly and returning to the sump quicker.
I agree. Most people think it is for stroke clearance. It will show about 15-20 horse on the dyno. Jack
