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      05-05-2013, 10:30 AM   #9
Midlife Crises Racing Gold Chain Class
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Drives: 2006 MZ4C, 2017 Corvette GS
Join Date: Oct 2007
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An inline 6 is impossible to cool when supercharged or turbo charged. There's no way to get sufficient cooling to the last two cylinder to evacuate heat fast enough. That's why Dinan's tune for the N54 and N55 specifically address this by increasing water pump speed FIRST. During testing they found that even at moderate increase in boost, cylinder 5 and 6 were showing signs of hot-spotting. The problem isn't solvable without significant investment into multiple cooling cores for oil and a MASSIVE radiator. I would be surprised if the new M3 does not come with at least 4 oil coolers and some form of upgraded water pump and radiator, if it does come in a tri-turbo inline 6. And I would be surprised if the 335 does not continue to suffer from limp mode induced by insufficient cooling.

The turbo charged 4, on the other hand...should be far more efficient in that regard.
Sitting on a beat-up office chair in front of a 5 year old computer in a basement floor, sipping on stale coffee watching a bunch of meaningless numbers scrolling aimlessly on a dimly lit 19 monitor.