Reply With QuoteI don't know what a std one runs at. These aren't Japanese turbo motors though, tuned VW ones don't go that low.Originally Posted by tmh983
Dubber
Has anyone had a wideband sensor on their 1.8T AGU motor before? Just curious what AFR the factory tune typically runs?
I've got one on my car at the moment, when I floor it from idle to redline, the AFR starts at about 13.8:1 and slowly comes down to about 12.5:1 by redline. This seems a tad lean to me for a turbo car, but I know some of the more modern factory tunes don't run all that rich compared to older turbo engines. I've done a lot of work on subaru and nissan motors and they run right down in the 11:1 range on the factory tune under full boost...
Anyone got any other measurements of the factory tune I can compare to?
I should point out that under light throttle the AFR is spot on at 14.7:1 and the fuel trims are all perfect using the scan tool, the car runs strong under boost, so it doesn't feel like I have a fuel delivery problem...
Dub Crazy
VWwA Super Moderator
I don't know what a std one runs at. These aren't Japanese turbo motors though, tuned VW ones don't go that low.
Volkswagen Fan
Most "wideband" sensors are not that accurate as they get further away from lambda
the systems use on dyno cost about $3000 compared to the $200 units and close to stoichiometric they are apparently very accurate, but less so as they get further away
Bookmarks