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how do you know that its slower than it shoud be?? What are you compairing it to? My stock turbo is fully spooled by 2800, thats with stock intake and full exhaust. to keep the fuel safe.
yo reted are you 89-91
they say 86-88 spools slower so maybe mines about right
by the way i have straight pipe to rb cat back, hks intake, no air pump, turboxs bov