Not sure if this is the right section but...
Bought the car2 weeks ago now, had a z4 ecu with some strange chip that no one had seen before, the boost gauge in the car was saying i was getting around 8-9 psi, which i belive to be low. car feels pretty quick but only thing I have to compare with is my old TT so not a great comparison that didnt feel as quick and was pushing 14psi. I have just fitted a gems ecu and it is boosting exactly the same however seems quicker.
Faulty gauge?
boost leak?
The vehicle is fitted with a hks fuel cut defender, could this effect it?
i knew i should of bought an unmodified car!