Are you still running a stock short block?

 

I got 383 with tvs2300. 1 7/8 headers with 3" duel into borla xr1's. 228/232 trick flow heads. 10% overdrive . 3" pulley sees 9psi

 

2015 5.3 tvs1900 w/ corsa catback

3.4 = 6# (stock pulley)
w/ CAI 7.5# (GMPP K&N eta: & BBP tune)

will update after i install new pulley soon

 

I made this sticky so others who are new to supercharging or changing pulley's will have something for reference.

 

Nobody running a Whipple?

 

There are a few. We just need to get them to chime in here...

 

Ok, I'll chime in. I have a Whipple 2.3 on an LQ4 with 216/224 cam and 1 7/8" ARH headers. Haven't had it on long but I'm still on the 3.75 pulley that it came with. Before the cam and headers I was getting 8 lbs, now it's 6.5. I blew up the 4l60 and just installed a Performabuilt Level 3 with 2800 stall so I'll run this for awhile before I go to a 3.5 pulley and will update when I do. 2002 Yukon Denali.
Edit: I ordered a 3.375 pulley today.

 

I have a sidemount , making about 10 psi with a 2-5/8" pulley. (that was on a 408)

 

Whipple 2.9 on an LQ9. 1 5/8 headers with 2.5" exhaust.

3.625 pulley - 11#

 

You picked up 1.5lbs of boost from installing a new intake?