When I'm reving my friend's GTT from 2000 till 5000 with a 2/3 throttle (in this case boost is around 6-7psi) first as the acc pumps a bit it gets around 12-12,5 but soon after leans out till 16-16.5.
If I rev the car with wot than it is around 13-13,5 all the range. (std. boost around 10psi)
Is this normal from a std. carb or shall I check something?
Thanks again.