02-09-2014, 09:22 PM | #45 | ||||
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At 81k this is a great car. Maybe the cooling will suffer in very hot weather but who cares? I am thinking this car will be raced in a M235 series somewhere and we will all hear about it. Like the Ferrari challenge cup or the Porsche 911 cup using a normally aspirated engine back in the late 90s. In recent years, VW did a diesel study with their Jetta TDI cup cars. I think they ran those 2 years. |
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02-10-2014, 09:47 AM | #46 | |
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1. Oil cooler desperately needed. 2. Larger intercooler desperately needed. 3. Unsure if we need a Tranny cooler. With all that said, I hit limp mode at the end of Run 3 on a warm fall day (these are full throttle 20 minute sessions so I was glad). And then again at the end of Run 4. I'm positive in a lighter car, with better tuning (I'm running the PPK so similar numbers to the M235i), and more cooling, I could've made it through the entire day without issue.
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02-10-2014, 10:26 AM | #47 | |
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They don't count on the way to work or spirited canyon carving. But they do matter in a race. I don't race, so MT works best for putting a grin on my face. But if every second mattered, gotta go with the best technology available.
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02-10-2014, 10:43 AM | #48 | |
TIM YOYO
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For a production car that people will drive for 100,000 miles, you want a tight operating envelope for things like engine and turbo temperature. This is especially true when your service intervals are as long as BMW's. With the race car, they might specify a different grade of oil and far more frequent service intervals. I can't imagine racing twice on the same oil, for example. Given those changes, it would be possible to allow the car to run hotter before encountering limp mode. Yes, the turbos are probably going to bite the bullet far before they would under the production car operating envelope, but that might be an acceptable consequence. I'm just speculating here, but I think the important take away is that you can't infer things like when the car will encounter limp mode based on production car parameters, because many of these are controlled by software. For all we know, the production parameters are extremely conservative to protect the car against obstinate end-users.
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