Originally Posted by
James @ M Developments.
You say bigger turbos and power need more fuel and will be more thirsty, and all I'm saying is the lower half of the fuel map is quite the opposite it will probably have less fuel in it.
If you cruise a stage 1 car at lambda 1 and then swap injectors and do the same with a T3 803 setup the fuel consumption would be identical as the engine will need the same fuel quantity to run lambda 1. Only becomes heavier on fuel if driven harder.
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.