AF Noise FK8 Type R

[contectr]

Hi,
I have a customer car with rampage turbo 450 , 3.5" Maf Housing , Prl exhaust and Frontpipe, Prl Airbox and Flex Fuel.
In the WOT i have some AF swing , i attack the datalog..
The car and the power feel smooth, only this bad AF curve

What can cause this?

[Spunkster]

It looks like this needs some tuning of the AFM to get the proper af readings.

[Hondata]

It's not the AFM tuning (but you do need to make the long term trim negative) but turbulent flow past the sensor.