Quote:
Originally Posted by Cadence
Who has dyno'd to check their A/F ratios from idle to redline after the installation of a header-back catless exhaust, i.e. Akrapovic, with stock engine software? I wonder if the cars run lean, rich or perfect?
These tuners who are actually extracting more power, it must be through leaner mixtures and advancing timing.
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http://www.m3post.com/forums/showthread.php?t=353026
The A/F graph is kind of small, but you get the picture. I know that Powerchip advanced the timing with their tune on my car...and the A/F looked good after the tune. Unfortunately I have not been able to get a copy of the Powerchip dyno because the dyno operator we went to was not exactly computer literate.