The kit that I received Supposedly "NEW" came with a 3.3" , 3.1" and a 2.94"
the larger 2 fit i had to grind the snout and the pulley a little so it would fit.I bought a 2.75" that I shimmed out to clear the snout ,Big mistake, the nut loosened up and destroyed the pulley.It ran like hell at 10 psi till that happened

 

I would think the even the stock pulley should net you more than 3psi, especially if you were seeing 10+ with the 2.75" one. Did something more than the pulley get damaged? Just a thought.

 

where did you get this kit?
Allen was telling me about that i think. what boost did you make with the stock 3.3?

thanks man.

 

I never used the 3.3, i started with the 3.1 It made like 4-5 PSI.I bought the kit off Ebay.Plus I already had 43 lb injectors so pulley swapping was easy.The only other problem with 10 PSI was a broken U joint I took it off before the tranny went. The 3.1 was the smallest I could go without clearense issues.

 

I'm running the 3.3 maybe thats why I'm only getting about 3 psi. because you made only 4-5psi with the 3.1..........hmmmmmmmm, 2.9" pulley here I come!

 

I still have the 2.94" PM me if your interested in it and I still have a Gatorback belt I bought for the pulley i think its 110.5".