Stock Maf Limits

Mitco39

Got the 3" in and tuned. The only real benchmark I have was a 80-140km/hr speed run with the racelogic VBOX sport what is very accurate and used by car and driver to benchmark their cars. We started out with a 80-140 speed of 3.92 seconds. After the tuning we were down to around 3.60 seconds. The car is much faster now that I can safely run up top. I ran the timing into knock and backed off about 2 degrees to be on the safe side.

The downside to you guys looking for built block setups and want to run over 13PSI of boost I think different MAFs are still going to be required as now I am sitting ~4.75 volts IIRC. I think anything over 14PSI will peg the MAFs.

For what its worth my K value changed about 15% from what it was with the 2.75" boost tubes. So its fair to say that there was about a 15% increase in flow around the MAFs with the larger boost tubes.

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2007 Chevy Duramax - EFILive Tuned By Me
2010 40th W/ Nav - Boosted Performance - UpRev Tuned By Me
The Mrs. Ride -2012 335XI N55 BMW - Cobb Tuned By Me, Built by her
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