Just had my car remapped but found it was loosing boost high up the rev range.

Boost pipes and actuator were checked by the guys doing the remap and these were ok.

He suggested the n75 valve might be at fault.

Do I replace with another n75 or do I get the n75j type.

Once fitted I can get the remap tweaked again.

I have read a couple of comments about this but still none the wiser:confused:

You do know that boost pressure will always drop back higher in the rev range? do you know what it peaks and drops to?

Where I got it remapped says it could have easily made another 8-10bhp but the boost was not holding long enough-

I will have to post the graphs when I get time