Tune question - Thanks for the extra set of eyes here.
Brief history - car was dyno tuned on ignite ethanol, now it's on pump e85, as a result, it's rich. That is not the root issue I'm trying to solve here, but instead we notice after a few laps on a circuit/road course, the WOT portion progressively gets richer lap after lap, to the point of the car breaking up.
I pulled fuel on the street - got him to 11.8 AFR @ WOT - can't reproduce the issue on the street. On the track the car obviously gets warmer. It's a v-mount supercharged setup with great flow to the radiator and insufficient flow to the intercooler. As such IATs are through the roof on track, so I cut IAT compensation down a bit. This did not fix the issue. First lap out, AFR's seem ok, every lap after it gets progressively richer!
Anybody mind taking a look at the tune and datalog?
Datalog notes: (2020-06-28 Gridlife Autobahn sunday session3 post transient enrichment fix)
- 1:40 mark: warmup lap starts, notice AFR's ok-ish (yea still rich, but bearable), Short term trims aren't terrible!
5:00 mark: AFR's getting progressively richer at WOT, Short term fuel trim cannot keep up!
Thanks in advance,