Thread: JB4
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      05-09-2021, 12:45 PM   #37
chris3g
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Drives: 2023 M3 xdrive
Join Date: Jan 2012
Location: NJ

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Quote:
Originally Posted by CanuckM View Post
Quote:
Originally Posted by chris3g View Post
this is on 93.
I really wonder if the car isn't pulling back to protect itself in sport or sport plus vs efficient mode. But that wouldn't make a whole lot of sense to me...I don't think changing driving modes adjusts the boost level?
As far as I can see the logs don't show really show that. In efficient mode at lower RPMs the car runs a lower boost target and higher throttle percentage, Terry has explained to me that the throttle % is a variable used to modulate the boost to the target value. Possibly there is something to the fact that on an absolute boost map the jb4 is ignoring the factory ecu boost target anyway. I'm not really sure as I don't have enough data yet to make a solid conclusion, my fastest runs were on comfort but its a small sample size and could be coincidence, Terry does not think the mode is significant at this point.
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