ill definitely agree with bad wastegate position on the manifold. a well built powerful motor can push enough exhaust gas thru 3 cylinders to keep the turbo spooling even more at high rpms. the revhard has a better location of the wategate whcih is right near where the 1st and second exhaust runners meet, thus letting more exhaust gas out from 2 instead of 1 cylinder.

as far as fuel management, from past experience id say the vortech fmu is one of the biggest POS's ever made to control fuel. ive had 2 of them break and almost fuck up my motor, just from that alone.

and then the ghetto ass check valves...i dont need to say much about those