Originally Posted by oldford

You are contradicting your self. Only the 2nd statement is correct. When running closed loop there's only 1 possible setting for the lower half of the fuel map.

I had a customer that was running one of my stage 1 chips in his 2wd Sierra.
I claimed 261 bhp and 360 Nm for that, which was measured on a very professional engine bench. The specific fuel usage was measured at 320 grams/Kw at WOT, more than enough, maybe even a little bit too much, so I saw no problems with the injectors.
At that time I had no stage 2 available and the customer ordered a 280 bhp set from the UK.
803's, 3-bar map sensor, the works. He drove around with it for a couple of days and then went back to my stage 1 chip. His explanation was that the car was simply faster with my chip with the added advantage of being more fuel efficient.