Originally Posted by Jon@Bimmersport
I am on the fence about throwing away my vortech based kits I have...as I can spin the HKS double the speed of the vortech I use.
Looks like the HKS is limited to ~ 15psi IIRC.
Edit: not totally apples to apples given the mods, but here's Mad dog's HKS vs the AA Rotrex dyno graphs. The lower half of the dynos are really similar, no?
90k rpm max impeller speed
952.5 CFM max flow
1:7.5 drive unit ratio
100k rpm max impeller speed
918 CFM max flow
1:9.4 drive unit ratio