Went to the Surrey Rolling Road this evening to find out how much extra bhp I've got for all my hard earned cash.
I made 315 at wheels. With estimated drivetrain losses on an auto of 25%, I make that ~420FWHP. Not bad I suppose... Nearly 100bhp more than I used to have when stock.
I do seem to be running a bit lean at medium revs, just when #2 comes on. From about 4000 to 5000 revs, my AFR rises to about 12.8. Then it drops again over 5000 revs at between 11.8 and 11.5.
I'm curious as to what could be causing this... Poor response by the FSE? I thought maybe the injectors were maxing out, but then I'd expect the AFR to high at max BHP, not in the middle of the graph. Hmmm.
In case anyone is interested, I also did a run with my Nur Spec removal silencer put back in. (I need it for the headaches!!) With the silencer, I was getting 305 bhp RWHP and hitting 1.1 bar intead of 1.2.
So: removal silencer = 10 bhp loss. Acceptable.