Quote:
Originally Posted by StillenZ84
Would def check the sizes. My silver pulley was the 8 psi and measured 3.12. My 9 psi was black and measured 2.75 or around there. I went from 8.5 psi with the 8 psi pulley to a little over 10 with the 9 psi.
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Well my boost did increase between the 2 pulleys...with the Bluish pulley I was pushing about 7.8 psi.... just shy of 8psi.....Stillen said this was caused by me running TP'S and having no cats (back pressure theory) so they sent me the 9b pulley and my car has been pushing 9~9psi on it .