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Old 06-08-2009, 07:44 PM   #8
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Join Date: Feb 2001
Chapter/Region: NWIC
Location: Portland, Oregon
WRX H6-3.0 Turbo


Originally Posted by klattery View Post
Is the 7cm 20G using a TD05H turbine wheel? I would guess so, looking at the plots. And it would make sense that the HTA compressor wheel is basically acting like a 20G compressor wheel because of the fin shape, making it like a TD05H 7cm 20G turbo.
As Tim mentioned below, it is a 6H wheel in the 7cm housing.

Originally Posted by tazswing View Post
Ah. so does that mean that the heat soak of the MAF does not matter so long as the air-charge is really not soaked? I don't know enough about the changes the computer is making based on a registered air charge. It would seem to me one could get much more out of the turbo if the actual and perceived air temp were close or the same measurement.
It does matter, as the ECU will pull timing and reduce boost. We were able to account for that on the dyno with tuning, but on the road it would be a factor.

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Last edited by sponaugle; 06-08-2009 at 08:07 PM.
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