I get 174mph then the car just wont go any faster it is limited and the gps reads 164mph 10% out like they all are.
I also had i derestricted and i had it at 184mph and i thought thats fast enought
I am geting my car delimited for £400 thats a rolling road then the ecu remaped to the rolling road fig. Then rolling road again to see the gains
the top speed limiter is removed when they do it.
There is 2 eproms need changing in the ecu, Bmw will do it for 500euros and you need a racing licence to get it done and the ecu needs to go back to Msport Germany takes 2 weeks.