What do you autocrossers and track racers use? Obviously you use something smaller so it's more responsive. The twins have got to go. Reliability reasons. So what single do some of you use for those applications?

 

Rx6 is what a lot of autocrossers use because its a super responsive single.
A track car would be better off with a GT 35/40,still very responsive but with a bit more grunt up top for Z06 bashing

 

T60-1 is what I have on a 91 TII car w/ FD manifold setup @ 20psi....Bolts to a reliable HKS manifold and is cheap if it goes bad.... I have to go back to the dyno and re-tune my new prim injectors ( 1000cc) and should be in the 510-515rwhp range....thats to much for auto-x in my opinion.. but its not just an auto-x car for me.

T60-1 turbo
.70 comp housing
1.00 A/R turbine

The T60-1 will get you into the 500 range w/ right ported motor, but @ 15psi would be better off in my opinion and will be around 460-470....I'd personally recommend the T04S or T04R... but the T60-1 spools faster... good luck