Quote:
Originally Posted by Daox
I was also going to note this. In most cars I've been in you don't hit fuel enrichment at WOT until maybe 4000+ rpm.
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Not sure but specifically I think before wideband O2 was popular it was common, I know my 1ZZ-FE is closed loop into the 4000s, never actually logged it in open loop mode!
I think wideband O2 equipped cars are running richer at max torque to reduce exhaust temperature a little bit and make the cats last longer. I followed the BRZ/FRS pretty closely and the AFR goes down to 10.9:1 at high rpm! It dips into the 12s well before 4000. Reflashing that to 13:1ish gains a huge amount of power...