These are the
oil coolers I've tried and the results. The car is a 65 Mustang road race car with a 331 cu in stroker, making about 500 hp, running 15/50 Mobil 1
synthetic oil. My normal rpm range while on track is from 3000 to 7000 rpms......
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This is a "headered" engine
oil cooler, it is the least effective,but does offer great flow thru the cooler becasue of the bigger tubes, problem is, the oil flows too fast thru the cooler to cool it down to any degree..I have a temp gauge in the oil pan and one coming out of the cooler as it goes to the filter,giving a reading of the "cooled" oil before it goes back into the engine. This particular cooler would start out with about a 15 degree difference,during the course of a 30 minute race, that difference would drop to about a 5 degree difference!!!!!!!
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This is the next cooler I tried, it is a single pass engine oil cooler, somewhat better, but still not enough. The tubes are large for flow, but I think that also hurt it's cooling capacity, with this cooler I would see no more than a 10 degree drop in oil temp....
David