EOT meter for OEM oil cooler

[dsinned_imp]

Today, I repeated "test #1" but this time with a fan mounted. This is the fan pictured in my last post, which is the least costly and probably the least effective due to its relatively small air flow capacity. Nevertheless, I opted against a larger, much more powerful fan (Spal 5.2" pusher) primarily due to the much heavier load it puts on the battery. That fan would do the best job of cooling, but has this other downfall.

I believe the ideal fan would be a 4" Spal pusher, but that's the one fan I don't yet have in my "collection". It would probably do the best overall job of cooling the EOC without overloading the battery. Also, I can't find a supplier with the same fan with a finger guard. Spal makes it, but nobody seems to stock it. A finger guard is worthwhile the added safety it would provide for this application. I might have to call Spal's NA sales office in Iowa to order this particular version.

Anyway, the results of the repeated test was still favorable. The peak EOC temp was 210F over exactly the same route and nearly identical environmental conditions as Test #1; maybe a tad cooler OAT and a bit more wind. The fan was running continuously since I set it to turn On at 150F. The Trail Tech meter worked perfectly and the voltage out of my battery (with fan running) was nominal at 14.2V.

The stationary heat load on the EOC is too much for this little fan to overcome. I'm sure it helps, but it does not flow enough air into the cooler to be of much value in worse case stop and go traffic. It works fine at a sustainable road speed of 45 mph or greater. That's not saying much because the cooler itself can do nearly as well without no fan.

Bottom line, the feasibility of mounting a pusher fan has been demonstrated. It's just a matter of selecting an appropriate fan such as a 4" Spal.