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Old 06-03-2009, 04:04 AM   #49
Scooby Specialist
Member#: 89752
Join Date: Jun 2005
Chapter/Region: SCIC
Location: On the dyno at Yimi Sport
08 STI


Originally Posted by sponaugle View Post
I switched to my MAF tune for this.. SD would add another variable. You are correct that in SD I suspect the car would be a bit leaner, which would probably make more power. That is one of the critical reasons you have to have good logging and compare the data with care. Had the car been in SD mode, it might have gained power everywhere, but only because of the change in AFR. (obviously if the AFR changed it would do so only as a result of VE.. so there would be more to the story).
I would actually be quite curious to see how the AFR's changed with your SD map as that would represent a clear change in VE. We'd also be able to see where in the rpm range the manifold was either helping the most.
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