Originally Posted by
lford
Please elaborate on how the piston being positioned tapered side up would provide more pack, as every other tapered piston i have used has been flat side up to give more pack and quicker rebound speed. Thanx
They are supposed to be installed taper side up, which as you said, will reduce pack. When I originally built my car I had them in flat side up, then switched them to taper side up. The car worked well both ways but was better with the taper up. I also tried the 6X1.6 pistons. That didn't work nearly as well as the 4X1.8 for our track.