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      12-24-2012, 11:54 PM   #48
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NiVeDh's Avatar

Drives: '08 E90 335i, '99 E36 M3
Join Date: Apr 2009
Location: Houston, TX & Atlanta, GA

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Originally Posted by Ænema View Post
Basically, you log "Boost setpoint factor" and "MAF req(WGDC)" and then adjust the WGDC base table in the corresponding cells where the overshoots/undershoots occur. For over boosting i like to make adjustments(reductions) by a factor of 5-10%. For under boosts I go by a smaller value(2-5%) because as you increase the value the percentage increase grows each time. Increasing the WGDC adder table also works on under boost, but I kind of like using the base table.

My stock turbos are pretty healthy and not very picky so I haven't had to make a lot of changes. I have a set of TD04s on the way, when they get installed I have a felling I'm going to be spending a lot time in the WGDC tables haha
Good info, thanks!