<240whp with atts...
 

is it true that when you hit ~240 WHP that the ecu disengages ATTS?

on board dyno? doubtfull.

i'm not saying the computer thinks "well i'm pushing ~240hp, better stop ATTS".. just somehow the stress of the power or something like that.

I have heard something about this, not sure since I dont have an SH, but I remember people talking about it, did you do a search?

never got a clear explanation

I can remember a few (less then 10) instances where people boosting would have the ATTS kick in erraticaly. It seemed though that it was more a result of sudden boost rather then hitting a certain power level. I never heard any issues while running under 7 lbs on a turbo or a JRSC.