Quote:
Originally Posted by Tor
I went through a lot of my old logs and even the stg 1 tunes do it right at the same spot, just not quite as pronounced. Also the old tunes before the uniform injector ratios do it. I guess it has to do with the AVCS?
|
I don't have a lot of knowledge on this topic. However I did compare a couple of logs from my friends, running the same header and tune (122.1), and the AFR looked like this, three different shapes:
You can clearly see my car with the pronounced rich dip.
On my car with the 122.5 tune it looks like this (uncorrected for SAE), it's the 122.5 100 stg 2 UEL +2% (default) Wayno tune:
As you can the shape of our AFR is very similar. I played around with some MAF scaling (generated by a friend) , the lean hump at 4 - 4.5k rpm was then resolved. However the rich dip at 3.5 - 4k rpm remained.