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      10-05-2011, 07:14 PM   #1
JMonakar
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Drives: 135i
Join Date: Oct 2011
Location: USA

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Cobb Accessport - Power Dropoff

Just recently installed the Accesport on my 135i and noticed a few interesting items I wanted to share with the group here. If anyone from Cobb can chime in, it would be helpful.

Noticing a loss of power and different intake sound in the > 4000rpms area after the car has been driven for 45+ minutes on the highway. Think it is related to the Cobb tune cutting timing with higher IAT's. It's 74 ambient out, but I'm seeing charge air temps at 102 at cruise and in the 120 area at WOT.

Car is 100% stock aside from the tune.

Just to rule it out - checked the air filter since I'm noticing this at high load, high rpms. Looks fine, but not a likely culprit as power output feels dramatically stronger in the same conditions during the first half of a long drive.

Are other Cobb owners noticing this?
How about JB3 or Vishnu tune owners?
Thanks,
J
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