luckythirteen13

what i would do, just buy whatever size you want pulley from vortech or ebay or anywhere, take it to a machine shop along with a photo of the ultra grip pulley and tell them to do the same thing to your pulley. its just a few holes drilled into a reglular pulley

Sleeper302

Thanks for the input. I understand the belt may slip with a 2.75 pulley, but with the blower stand up to the increased RPM.

99roushgt

yea what exact blower do you have i have a t-trim and vortech says its most efficient at 26psi see and i think the S and Sq's say 20psi

VORTECH V-1 T-TRIM SUPERCHARGER
The supercharger of choice for street/strip vehicles with modified engines
Straight cut spur gear
Fits engines up to 825 horsepower
Maximum airflow: 1,200 CFM *
Maximum boost pressure: 26 PSI *
Maximum impeller speed: 55,000 RPM
Adiabatic efficiency: 73% **
Available with straight or curved discharge and clockwise or counterclockwise rotation


* Flow and boost ratings are based upon efficiency. All Vortech superchargers can exceed these ratings but they cannot perform efficiently above these ratings. Vortech uses an efficiency rating of 60% and above as the approximate minimum usefull range.

luckythirteen13

i have the s-trim kit (v-1 head unit). i think its good to 20psi