I only used 2 histograms: LTFT1+STFT1 vs MAF Voltage, and LTFT2+STFT2 vs MAF Voltage. If LiveLink can do the same thing as VCM Scanner, I haven't figured it out and LiveLink crawls on my laptops. I used SCT's Pro Racer Package to flash the tune, and VCM Scanner to collect the data. I applied that approach to the Mustang, and got similar results. Within 2-3 tries, I got the Cobalt's LTFT down to +/- 2%. I'm sure there is a way to program Microsoft Excel, or create some kind of MATLAB/miniTab program to do this as well, but VCM Scanner's histogram collects data points for your MAF (or any other PIDs you wish to log). VCM Scanner's histogram feature is probably the most awesome feature I have seen. VCM Editor works kind of like SCT Advantage, except VCM Editor works much much much faster even on an Atom netbook. Since the Cobalt comes with a wideband O2 sensor and direct fuel injection, it was different to tune than a Ford but was actually easier thanks to the VCM Scanner and VCM Editor programs. I bought this originally to tune up my 09 Cobalt SS Turbo because I installed the K&N Short Ram Intake and caused the LTFT's to spike 10-12% lean. I have been using SCT's Pro Racer Package (SCT Advantage software) for almost 10 years but one of the biggest challenges I faced as a DIY tuner is that tuning the MAF was always a pain since I had to sift through lines of LTFT/STFT data.Įnter HP Tuner's VCM Suite. I was hoping the OEM MAF calibration would get me close enough. However, I decided to actually datalog the LTFT and STFT (Long and Short term fuel trims) earlier this year and wasn't too thrilled to see them being way lean, as expected with an aftermarket intake.
I have the Steeda Cold Air Intake, and have been using the Shelby GT MAF Transfer Function for just over 2 years without any problems. With Slower Duration set on the interface, I can get over an hour of data on the Interface with the Chevy.
I wish it'd work, because it is a lot easier to just record the data and then go home to analyze it on the laptop - versus lugging the laptop along. This should apply to other S197 Mustangs as well, but Note: I still cannot get the MPVI Pro interface to do standalone logging on the 07 Mustang.
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