Who tunes with only STFT's?
04-09-2005, 10:54 PM
#21
TECH Enthusiast
iTrader: (26)
Join Date: Mar 2004
Location: Long Island
Posts: 589
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Silverhawk_02TA
What horist said. 
Make sure your LTFT's are within +/- 10 before turning them off and using your STFT's to tune. This is the method I use, and lemme tell ya, it's a hell of a lot quicker and less of a headache.
When using STFT's there is no trim resetting to be done, as STFT's are not "learned". They are a second by second fueling adjustment that the PCM uses based on what the O2's are showing. I will typically log for 10 minutes, then adjust the VE table, then log another 10, etc. Using this method, I was able to get my VE table adjusted so that all my STFT's average between +/- 3 in less than an hour.
When you're done, just re-enable your LTFT's. Once they learn out, they should all be very close to 0.
Make sure your LTFT's are within +/- 10 before turning them off and using your STFT's to tune. This is the method I use, and lemme tell ya, it's a hell of a lot quicker and less of a headache.
When using STFT's there is no trim resetting to be done, as STFT's are not "learned". They are a second by second fueling adjustment that the PCM uses based on what the O2's are showing. I will typically log for 10 minutes, then adjust the VE table, then log another 10, etc. Using this method, I was able to get my VE table adjusted so that all my STFT's average between +/- 3 in less than an hour.
When you're done, just re-enable your LTFT's. Once they learn out, they should all be very close to 0.
On my 2000 I installed long tubes, gutted cats, and a cat back. After the exhaust I dynoed the car and was a bit rich, 12.2ish. I just installed the LS6 intake and did a data log. My LTFT's were between 7 and 10 in the red (positive???) using HP Tuners.
Should I start playing with all this STFT and VE tuning? Theoretically the same volume engine is now more efficient but is the change enough to warrant me changing the tables?
04-09-2005, 11:01 PM
#22
TECH Enthusiast
Join Date: Jun 2004
Location: Fredericksburg, VA
Posts: 576
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by My90Iroc
On my 2000 I installed long tubes, gutted cats, and a cat back. After the exhaust I dynoed the car and was a bit rich, 12.2ish. I just installed the LS6 intake and did a data log. My LTFT's were between 7 and 10 in the red (positive???) using HP Tuners.
Should I start playing with all this STFT and VE tuning? Theoretically the same volume engine is now more efficient but is the change enough to warrant me changing the tables?
Should I start playing with all this STFT and VE tuning? Theoretically the same volume engine is now more efficient but is the change enough to warrant me changing the tables?
04-24-2005, 08:35 AM
#24
TECH Enthusiast
iTrader: (4)
Join Date: Jun 2003
Location: MS
Posts: 551
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by SuperC1
While in SD mode my histogram quit logging after I reset the trims, what could be wrong?
Last edited by SuperC1; 04-27-2005 at 07:09 PM.
