2Tightwads

Article Title (P. 80) : Punch to the Mid Section, Tuning a 2010 Camaro SS Gains 27 lb-ft of Torque and Tons More Under the Curve.

Tuned by http://www.corvettemasters.com/new/index.html.

Anyone else read/see this article? Don't think I can scan in any for viewing purposes due to legal stuff but...

Question: Does it look like they hacked the PE table to command a lower final AFR? Why no MAF/VE table tuning mentioned, hummm?

Using the data from their Hp Tuners screen shots they are commanding in their PE tables the following values (Assuming on my part Stoich is 14.63AFR) -

2,500 RPM-3,500 RPM : 1.204 = 12.15 AFR
4,000 RPM-4,250 RPM: 1.234 = 11.86 AFR
4,500 RPM-8,000 RPM: 1.239 = 11.81 AFR

Yet their data on the dynojet wideband shows they resulted in an actual.

My estimate from screen shot of dynos wideband measurements below -

3,000 RPM: 14.00 AFR
3,350 RPM: 12.25 AFR
3,500 RPM: 12.50 AFR
4,000 RPM: 12.50 AFR
4,500 RPM: 12.45 AFR
5,000 RPM: 12.25 AFR
5,500 RPM: 12.25 AFR
6,000 RPM: 12.25 AFR

My opinion: Shouldn't the commanded AFR be spot on to the actual AFR IF they tuned the MAF/VE as we are expecting from PRO Tuners?

Mike TexaSS

iTrader: (2)

You are correct. But if you log a stock car GM's commanded air fuel and actual are a little off. On a completely stock car you can just add through the pe table. But as you start getting more advanced mods you need to properly dial in the MAF.

I.E. Set the PE table to a given air/fuel and tune the maf until actual A/F is the same as commanded. And as far as VE is concerned I disable it and tune through the MAF.

2Tightwads

In regards to specifically the 2010 applications - (Learning along with all other tuners in Texas so asking for your blessing) Not only is it recommended to tune MAF only...I also tend to leave the VE inactive in the end as well running MAF 100%, you?