Smallest they would send me was 2-3/8". It was about the size of a nickle spinning on that thing. 3psi seems low even with a CAM....I would have expected around 5psi.

 

this kit cam with 3 pullys i put the smallest one on... ill measure it and see what size it is.. I to thought id have more boost... i guess my exhaust and stuff flow to well...

 

only difference between your motor/exhaust and mine is the CAM......and i doubt that is the cause of 3psi less than mine. How are you measuring boost? With a guage or with tuning software? If its a guage....do you trust it?

 

its off the gauge, plumbed into the intake elbow.. i was looking at your photos and my blower isnt exactley the same.. guess they made some changes.. like i dont have the eye hole to see the oil level and stuff, or the polished rings on top.. i guess mine was number 7 build. It says 8.1 / 007 on the supercharger and the intercooler and neck say 8.1 /002 so who knows.

Yes the boost is off a gauge. it was the cheap autometer.. i could have kink in it or crack i guess. i uses that cheap plastic hose.. In my other cars i did the expensive gauges.. when weather gets over 15* ill check it out.. im sure a better hose would be a good idea.

Do you have a part number for that 2 3/8 pully you where talking about... How does whipple measure there pullys? Reason i ask is if your is that much smaller than mine i dont see how you would bolt it on. I emailed the last week and still no reply. imagion that lol.