AlNyhus
Silver $$ Contributor
Somewhere between a full and a 'slipper" skirt would be the best way to describe them. With the 2618-T61 material, the wall clearance has come down considerably from years past. This has allowed the use of thinner rings. In Stock, the ring grooves have to be OEM but you can use any ring width with a spacer. I'm not a big fan of the spacer setup due to ring land issues but some guys make them work. This is an area that NHRA doesn't police very well and many are running a .9 mm ring pack with no spacers. The .9 setup does get you backed into a corner for ring material and hone, though. With the .9 mm setup, the use of a profilometer to establish the cross hatch angle and final Ra number is mandatory.What’s the design approach today regarding piston skirts… short or long?
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