Last weekend we were mapping a 2.2L turbo Impreza with an Electromotive setup in it. We were seeing about 1600 degrees (F obviously) of EGT and the AFR was around 14.5 or so (about. 0.98 lambda) and I added fuel until lambda was about 0.84 and EGT was around 1500 max.
1600 F = 871 C, so is this approaching danger levels for a yb running std pistons?
When I was playing with the dyno just about every day, we found that max power was almost always around 12.7:1 AFR and that anything beyond that (richer) was just additional cooling
obviously the down side to this is that fuel economy is worsened, but do you also start to lose power significantly or cause any other dangerous situations (e.g bore wash)?