Hello!

I have the next promblem :

On the normal (not a cold ! ) car the AFR is more reach , than after a few drag or roll race.

i.e. on a hot car AFR poorer and closer to AFRmap.

The difference is around 0.3 .

Evo 9 Speed Density

Ignition Project coils

Denso Racing IKH27 sparks

Water/Methanol Injection

Are there any thoughts as to achieve stability?
Thank you!

 

I do know that the hotter the IAT, the richer the tune will be. This counteracts knock that could be happening with lean AFRs in hot weather. It's adjustable with Tephra V7 if you want to tamper with something that may save the engine. The water/meth injection might be something causing this as well.