Quote:
Originally Posted by Milhouse86
+1 for you should do an oil cooler. I would not be rebuilding my motor if I had.
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Quote:
Originally Posted by Milhouse86
Coming from the I blew my engine category, I ran the Motul 0w20 everyone recommend. I had 0 track experience. 3 days out over 2 months and I blew it up at Gingermen raceway. 76 degree day, topped out at 86 mph in the big 180 left hand sweeper on the back half of the track. Started making noise and then lit up like a Christmas tree and shut down.
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Quote:
Originally Posted by 86TOYO2k17
An oil cooler is relatively cheap insurance.
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Engine failure with no oil cooler does NOT necessarily imply
engine failure because no oil cooler...
If sufficient oil wasn't being delivered to bearings, things were gonna go bad with or without an oil cooler...
I'm open to being edumacated further on this, but my position regarding HPDE-driven cars is:
1. 270-275F is not too hot for good synthetic oil.
gcranston and others have had oil analysis done after running at these temps with no indications that the oil had been overheated to the point of degradation. For my usage of ~15-20 minute stints and changes after every couple of 2-day events or ~4 hours total, I don't believe the oil is breaking down between changes.
2. viscosity isn't an issue if you run thicker oil. 5w30 at 270-275F has about the same viscosity as 0w20 at 235-240F.
3. Pressure isn't an issue. We have test data showing the *same* pressure running 5w30 with vs. without an oil cooler. With the oil cooler the oil temp is ~250F and without it the temp is ~272F, but pressure drop in the cooler apparently exactly offsets any pressure that should've been gained due to running cooler/thicker oil.
https://www.ft86club.com/forums/showthread.php?t=91820
I might consider an oil cooler IF I were endurance racing, or IF oil temp continued to climb (always holds at just over 270F indicated, whatever the ambient temp), or IF coolant temps were a problem (always runs middle of the gauge even at 95F track days).
Anyway, that's my reasoning and I'm open to critique of it.