LTFT's and STFT's question

Posted: Tue Jun 30, 2009 8:59 pm Post subject: LTFT's and STFT's question

When doing a MAF tune and you disable it to monitor the LTFT's should your STFT's got real rich or lean? mine were around -20 when I disabled the MAF the first time. Ran it for about 40 miles and scanned, edited the MAF table when a little depending on the LTFT's that showed up. Reran the car and disabled the MAF again and this time the STFT's where better around -17 through -15.

I re-adjusted after the last run and couldn't get her back out due to screwed up wheel studs. so I think i'm on the right track here. I need to get the WB hooked up aand soon!

Posted: Tue Jun 30, 2009 9:22 pm Post subject:

Honestly, just run a stock VE and tune it that way. VE tuning is alot of work that doesn't result in too much improvement. I spent an entire day & tank of gas getting mine perfect about 3-4yrs ago, but the change in the way the car runs is minimal, regardless of the mod level.

A clean MAF tune (a.k.a. normal tuning based on LTFT's at each MAF frequency), is going to get you where you need to be. Later on, you'll hopefully be using WB data to dial in WOT (which VE doesn't touch).

- Dave
_________________
2004 Regal GSX - YouTube channel Stattama T67BB, A2W IC, ST5, heads, L32, GMR diff/chain (11.46 w/ Z7 T66, IS3t cam)
2006 Grand Prix GXP - K&N intake and mufflers only, basically stock for me
2012 F-150 EcoBoost SuperCrew 4x4 - stock DD and roadtrip vehicle
1998 Daytona GTP #838 - I/C*d MP112 L26 - Rust in Peace, engine saved

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