Everyone with oil temp issues

ChrisSlicks · 06-25-2009, 04:59 PM

I'll take auto-cross as an extreme example of low speed driving. Our auto-cross site has a speed limit of 70 mph, we basically drive the whole course in second gear. There is lots of hard acceleration and hard braking with the rpm consistently in the mid to high range. At the last event I was hitting 260 degrees in 100 seconds. If I were to keep driving like that the temperature would keep rising and eventually hit limp mode, but fortunately auto-cross has a long cool down period between runs.

I could drive half as hard on the street and still get there, but it would likely take 3 times as long. Acceleration is what generates the most heat as that is when there will be the biggest bang (fuel combustion) and when the VVEL is the busiest. So on the street, switching between full throttle acceleration and braking you can still hit limp mode in no time, speed is irrelevant.

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06-25-2009, 04:59 PM	#11 (permalink)
ChrisSlicks A True Z Fanatic Join Date: Mar 2009 Location: North East Posts: 6,203 Drives: 09 370Z Sport M6 Rep Power: 654	I'll take auto-cross as an extreme example of low speed driving. Our auto-cross site has a speed limit of 70 mph, we basically drive the whole course in second gear. There is lots of hard acceleration and hard braking with the rpm consistently in the mid to high range. At the last event I was hitting 260 degrees in 100 seconds. If I were to keep driving like that the temperature would keep rising and eventually hit limp mode, but fortunately auto-cross has a long cool down period between runs. I could drive half as hard on the street and still get there, but it would likely take 3 times as long. Acceleration is what generates the most heat as that is when there will be the biggest bang (fuel combustion) and when the VVEL is the busiest. So on the street, switching between full throttle acceleration and braking you can still hit limp mode in no time, speed is irrelevant.