Recent content by de123

  1. D

    Whipple pulley advice and tune for 550-600 rwhp

    I just purchased a 04 cobra stock engine gen 1 whipple with a 3.5 upper and boost is set at 14 lbs , cat back exhaust no headers at the moment from the spec sheet it made 417 rwhp on 91 oct tune (mustang dyne) , what possible hp ratings can I get if I change upper pulley and headers with new...
  2. D

    Whipple pulley advice and tune

    I just purchased a 04 cobra stock engine gen 1 whipple with a 3.5 upper and boost is set at 14 lbs , cat back exhaust no headers at the moment from the spec sheet it made 417 rwhp on 91 oct tune (mustang dyne) , what possible hp ratings can I get if I change upper pulley and headers with new...

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