LoveThisTruck said:...
It's only making 7lbs of boost with the 10# pulley:dontknow:for 635rwhp. I think I'm going to get that lower pulley from Tony, and see what she does. Anybody got any ideas on why it's not making more boost???
Willing to bet that you have had some head work done at some point. When someone does even "just port matching, or a quick and dirty intake and exhaust clean up"...it reduces the back pressure which is really the function that produces boost numbers...my builder spent a day or two cleaning up the air flow with a grinder and I can only push about 8 lbs of boost with the 10 lb pulley from Sean.
Less boost due to good air flow is good in my mind...it allows you to do more on the front end of pushing air with less wear and tear...IMO, the under pulley from Stinker will have some pretty dramatic effect...
Nice work!