Lean spike right at vtec change
Posted: Sun Jul 17, 2005 5:38 pm
I have a lean spike right where the VTS goes on. I am not getting cut (using the first default lean protection setup) and it's only for literally ONE frame... so, I'm assuming that this is normal and nothing to worry about.
I have a k20a2 03 rsx type-s with injen cai, custom magnaflow exhaust, IMG, TB bypass, grounding, Jackson race header with high flow cat. I have been running around on the cold air calibration.
The day that I got the kpro I loaded up the coldair calibration, setup my overheat preferences, knock indication, and lean protection. I went out and datalogged a few 2nd gear runs to around 8400 or so, along with a few 3rd gear runs as well just to double check my A/F. The leanest I ever got was a 13.5 (this was with stock type-s exhaust).
The next week, I went and got a custom magnaflow exhaust setup done. My exhaust setup is now JRRH (2.25" collector) to carsound cat (2.5 in/out) to 2.75 piping to straight through resonator to 3" straight through muffler.
On the highway, knowing I had lean protection on, I decided to see what the butt dyno said. Eventually I got lean cut (as I expected I might, since I just put the last piece in my air flow puzzle
) accelerating WOT.
Later that night I went out with a friend, datalogged, and used conrads instructions for adding more fuel on the high cam fuel tables for the angle(s) that were affected. I got rid of the lean cuts.
That same night I noticed the lean spike on vtec -- it's never cut me, and I can tune to around dead rich right around vtec switch, but I still get a spike right at the switch... rich around it. Right now I have it running a bit on the rich side WOT to be safe.
Thoughts? This is basically the cold air calibation with fuel added in a few places to address a cut. Nothing else has changed.
I have a k20a2 03 rsx type-s with injen cai, custom magnaflow exhaust, IMG, TB bypass, grounding, Jackson race header with high flow cat. I have been running around on the cold air calibration.
The day that I got the kpro I loaded up the coldair calibration, setup my overheat preferences, knock indication, and lean protection. I went out and datalogged a few 2nd gear runs to around 8400 or so, along with a few 3rd gear runs as well just to double check my A/F. The leanest I ever got was a 13.5 (this was with stock type-s exhaust).
The next week, I went and got a custom magnaflow exhaust setup done. My exhaust setup is now JRRH (2.25" collector) to carsound cat (2.5 in/out) to 2.75 piping to straight through resonator to 3" straight through muffler.
On the highway, knowing I had lean protection on, I decided to see what the butt dyno said. Eventually I got lean cut (as I expected I might, since I just put the last piece in my air flow puzzle
) accelerating WOT.Later that night I went out with a friend, datalogged, and used conrads instructions for adding more fuel on the high cam fuel tables for the angle(s) that were affected. I got rid of the lean cuts.
That same night I noticed the lean spike on vtec -- it's never cut me, and I can tune to around dead rich right around vtec switch, but I still get a spike right at the switch... rich around it. Right now I have it running a bit on the rich side WOT to be safe.
Thoughts? This is basically the cold air calibation with fuel added in a few places to address a cut. Nothing else has changed.