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SAFC suggestion before I mess with it tonight

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91 TSi GP

10+ Year Contributor
372
4
Oct 7, 2008
Austintown, Ohio
I'm going to mess with my Generic tune on the SAFC/ Translator combo. I have my translator set to what feels alright.. wideband is showing a good idle 14.7-14.9... The car drives fine, maybe a tad to rich.. but I finally have my new clutch broke in and wanted to mess with the SAFC a bit and make things better. Right now everything is 0'd out on the SAFC. My fuel trims over the course of a 45 min ride ended up looking like... FTRL stayed right at 97.6%, FTRM finally updated maybe the last 20 min of the drive and it sat right at 97.6% also. And my FTRH started out being 91.4%, after about 10 minutes went to 86.7%, and then sat at 81.2% for the remainder of the drive.
From what I've read if you can get the fuel trims within 10% the ECU will compensate and it should be alright? So in that case would my low and mid trims be ok where they are? Do you have any recomendations for the SAFC before I get home tonight and mess with this. Any input is sppreciated.
Thanks, Gary
 
Why are you messin with a SAFC? Or have you not installed EcmLink listed in your profile?

Looks like you have the low and mid fuel trims just about dialed in, but you're rich on the high trim. I would pull out 5-7% from 3000rpm and up on the SAFC's low throttle settings. Get that high trim as close to %100 as you can then mirror the settings on the AFC's hi throttle setting. I always add a couple % to the AFC hi throttle settings before the first pull just to be safe. Log RPM, Timing, Knock and idc's. Set an alarm for the knock value and let off the throttle if you have any. You're probably using a palm logger so you won't be able to log the wideband but you should be able to judge where you are by keeping an eye on it through the pull. Pay attention to the rpm where your turbo first comes on boost as you may need to add some extra fuel there to quench knock on pump gas.

Just take your time and think about what your motor's doing when reviewing your logs. Good luck and have fun. :thumb:
 
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