Quote:
Originally Posted by white911
Bottom line on this, some tune that makes good numbers may not be good in all venues.
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That's a great point. I'm not a big proponent of Dinan products but I was impressed with the fact they actually dialed boost BACK at high RPMs to better drive-ability and also keep overheating at bay. From what I understand, even with very moderate boost in tune cylinder 5&6 just wasn't getting enough cooling so they decided to be conservative.
Another point to add, I haven't seen any N54 engined cars (mostly 335s but I've come across a couple of 135i as well) come to our track event and all the cars that have gone into limp mode has one form of tune or another (Vishnu, JB, and SSTT being the most popular). A few N54s with no engine tune and some combination of additional oil cooler or Redline Water Wetter added have not reported limp modes. Those are some additional data points to consider.