ok so when i am flooring my 05 mcs i get about 12 psi of boost on my guage...thats with a alta 17% pulley...i know its low...but when i get over 5500 rpm the boost slowly drops off...is that normal or should the boost stay where its at or keep climbing? and i here a very high pitch squeal not very loud.....i changed my belt 3 times now...i had a napa 535 and now its got a gatorback 1365 (537) i think...so i think i have a high boost leak or could it be a weak tensioner? is that common, and it still has original ic boots, new ones from alta are on they way...
any thoughts?
Cheers