View Single Post
Old 01-26-2010, 01:45 PM   #22
black bnr32
3rd Gear Member
 
black bnr32's Avatar
 
Join Date: Sep 2008
Location: saskatoon
Posts: 451
Quote:
Originally Posted by Jon@Bimmersport View Post
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?
http://forums.bimmerforums.com/forum...305271&page=13

also,
C38-81:
90k rpm max impeller speed
952.5 CFM max flow
1:7.5 drive unit ratio

HKS GTS8550:
100k rpm max impeller speed
918 CFM max flow
1:9.4 drive unit ratio

Last edited by black bnr32; 01-26-2010 at 01:58 PM.
black bnr32 is offline   Reply With Quote