Quote:
Originally Posted by Old Tele man
...how about enlightening us by telling us what "magic" boxes & software you used that enabled you to "get" that data from ECU so that it could be reviewed?
|
On some stock ECUs you can do that. One that comes to mind is VW. All VWs in the OBDII era can be datalogged. See:
Ross-Tech: VAG-COM I'm sure there are other products out there that are similar, ie scangauge already gets the data out of the blackbox, I'm sure that there's another product that will get that data into a computer to analyze.
jjf,
Sorry about the confusion, normally "going lean" is refering to lamba's over 1, or over 14.7:1. One instance of this is the 09+ Subaru STi's. They use a fuel cutout rev limiter. In the autocross world where I come from this is a very bad thing. When the fuel gets cut out, the mixture goes from "safe" in the 12.5:1 range, to lean, nearing 14.7:1, which promotes detonation. Normally this isn't a big deal in roadracing, or on the street, since when you hit the limiter, you shift. In autocrossing we've been known to ride the limiter for up to a second, or a second and a half, since shifting would actually make the car go slower. During this time, you're you high boost and load levels but leaner than the safe range. This has caused detonation which has destroyed multiple multiple engines in under 10,000 miles.