Hi Gents,

So I got my Car running, and I  tried to get it through mot, but i cannot get it approved with the original 250 Hp, the car can only be approved with 220 Hp.

So how is the best way to decrease the power ? It is a NA engine so lowering boost is not possible  But with my limited knowledge to the ECU I can think of following:

Lowering NMAX - FEB82 - i believe it is on 6500RPM at the moment, how much, any guidelines?
Changing Driver Wish Map - E8636 - How? How much, any guidelines?

Is there any other/better way to decrease the power so my car can be approved.

How do they test HP?

That is the only question that matters. Without an answer to that, there is no way to solve the problem.

Fuel has to be adjusted for that aswell , no ?

if he can get away with it the easiest would be to lower the rev limit

i dont no how much Hp loss
plz report
before test dyno make log original maf g/sec and 70% tp