1K single belt boost pulley ?

[genofive0]

Ok Guys I have a 1k single belt setup on my 91 gt.


As of right now it has an F150 crank pulley and a stock blower pulley, and a boostmaster Powerpipe. I see about 8 psi on warm 80* days. And 9psi almost 10 psi on cold mornings 30*.


Looking to get it close to 11-12 what pulley combo should I go with??

I would like to keep the crank pully at the 6.5inch F-150 if I can and just go with a smaller blower pully but witch one and where can I get one????

[blown92lx]

I believe the 2.75" blower pulley is the lowest you want to go. There used to be a thread that showed you would turn max blower rpms at around 6000 rpms on the engine. I think I bought mine off of superchargersonline.com but not really sure. Make sure you don't get the vortec pulley because they only have a single key and the paxton has a dual.

[regattacoupe]

I'd go bigger on the crank pulley if you can afford to geno. A 3" is a small pulley to begin with and a 2.75 is just asking for belt slip. Maybe get a true 7" crank from asp?

[blown92lx]

I agree, I constantly fight belt slip with my setup. With a bigger blower pulley you'll be less prone to belt slip. The f-150 pulley is the cheapo route to boost. Then again, I guess the 1k instead of the 2k was the cheapo route. <kicks himself again for not buying 2k>