Quote:
Originally Posted by tomm.brz
yes, that 's how LTFT applied in open loop works
it should learn the correction around 2.8-3v of maf voltage which is more or less the threshold between closed and open loop and then the ecu applies it into the open loop section
I dont know exactly how this work and actually not really interested anyway as i disable LTFT in open loop anyway in all the tunes I do
in stock tune there is a +-40% margin of LTFT that can be applied
In openflash tunes is tamed to 2%
in custom tunes is basically turned off by every tuner
an aftermarket filter panel like k&n for example usually already leans things out , but how LTFT reacts to that can be at times really random, that's why stock tune is garbage for this
|
It is interesting that you mention the K&N filter, as the other car was running one, and for fun we threw it in my car (which had a stock filter) and did another pull or two. My car gained 2 hp generally over the powerband. It sounds like it might not have been the filter, but rather whatever the fuel amount was being put out at that time was "happier" with more air, and thus the 2 hp increase.