[chet]

Originally Posted by maineyak

Hi Chet, I believe more holes gives more pack. Read this section from the Team Associated handling bible. Applies to any car though:

The 3 hole pistons generate more "Pack" than a two hole piston. As oil passes through the piston holes the resistance that you feel is actually the oil shearing across the edges of the hole. With more hole surface area (three hole piston) there is more "Shearing" as the oil passes through the holes.

This gives the shock more pack. Don't confuse Pack with Damping though. Damping is the consistent resistance the shock provides when it is slowly compresses and decompressed. Pack is the instant resistance a shock provides when it is quickly compressed or decompressed. Here is a good example of the two. Damping is how fast the Chassis leans in a corner or when you change directions. Pack is how much the shock compresses when you hit the face of a jump or land after the jump.

It all comes down to how much pack you need for the track you are racing on. If you are running on a track that has a bunch on big air time jumps, you will need to use a setup with a lot of pack. If you are running on a track that is rough, rutty and has small jumps you will need a setup with little pack.

Good info thanks man