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Open Track Racing
Cooling Temps and Oil Pressure for 99 Cobra around California Speedway
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<blockquote data-quote="David Hester" data-source="post: 12020543" data-attributes="member: 6794"><p>Um.......</p><p>Correct thermostat is important....for when water starts circulating-not temperture car runs. I didn't use anything but a flat disc in the A/Sedan car with a 1" hole in the center. I found if you didn't use anything, water didn't seem to stay in the radiator long enough to cool. With the disc, there was some back pressure and car ran cooler. Not sure why 170 would be considered, though. If water boils at 212 F, if you start circulating water too early, you are going to have a harder time getting condensation out of your engine, plus oil isn't going to be warm enough to flow everywhere.</p><p>I have been told by more than one engine builder, don't leave paddock till engine temp is 185. I've raced with <em>oil</em> temps up to 240-250 F.</p><p>Anything under 210-215F and you still have water vapor everywhere which we know isn't good.</p><p></p><p>I'm thinking that (240-250F oil) translates to about 215-220 water. Fine with a good radiator cap.</p></blockquote><p></p>
[QUOTE="David Hester, post: 12020543, member: 6794"] Um....... Correct thermostat is important....for when water starts circulating-not temperture car runs. I didn't use anything but a flat disc in the A/Sedan car with a 1" hole in the center. I found if you didn't use anything, water didn't seem to stay in the radiator long enough to cool. With the disc, there was some back pressure and car ran cooler. Not sure why 170 would be considered, though. If water boils at 212 F, if you start circulating water too early, you are going to have a harder time getting condensation out of your engine, plus oil isn't going to be warm enough to flow everywhere. I have been told by more than one engine builder, don't leave paddock till engine temp is 185. I've raced with [I]oil[/I] temps up to 240-250 F. Anything under 210-215F and you still have water vapor everywhere which we know isn't good. I'm thinking that (240-250F oil) translates to about 215-220 water. Fine with a good radiator cap. [/QUOTE]
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