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      10-12-2012, 02:44 PM   #7
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Drives: 08 E90 M3 DCT
Join Date: May 2011
Location: SoCal

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2008 BMW E90 M3  [4.50]
Originally Posted by bigjae1976 View Post
Unless you've been running something longer than a 20 minute DE session your DCT shouldn't overheat. How many shifts are you doing per lap? I've never had a heat issue in 100 degree temps but you do have to manage the car. You can't keep the tach pinned at the redline the entire time.
I agree that the car should not overheat if you're running short sessions. I'm fighting the overheating issue right now. I even installed an upgraded oil cooler and DCT cooler in my car with no significant difference. I'm thinking something is wrong with my car and trying to pin point the root issue. I'm obviously not cruising on track at 3K RPM but I'm not very long at red line either... short time on long straights while accelerating and shifting to next gear and short time coming out of corners, that's it. I don't even use 2nd gear on track. I'm pretty much always in 3rd and 4th with short time in 5th on long straight.

I checked my videos from a few weeks back in mid-90s temperature, it took 8 laps (~13min including 1 warm-up lap) for the car to overheat at which point I pulled back. And this was with upgraded cooling. Oil temperature needle was almost touching the 300F and I got warning that only higher gears were available.

If nobody else is having this problem than my only conclusion is that something is wrong with my car...