Originally Posted by bpu699
Well, you get an A+ for being creative.
How do you know your engine oil temps? Mine has a cooler temp and trans temp.
Riding grades clearly effects the oil temp, as reflected by my idle oil pressure.
Cruising along, stopping, idle pressure is 20 PSI or so. After grades, I can see 15psi at idle, and just sitting there over 1-2 minutes it climbs right back to 20 psi...
I welded in a bung for an oil temp sensor to the oil pan when I had it off to replace the bearings and oil pump in the engine. Temperature probes are often simple single-wire setups (just a resistance measurement), which is what I used. The gauge itself is powered at the dash and the single sensor wire runs the 40 feet from the dashboard back to the engine. I used an Autometer gauge for both oil temp and pyrometer, but there are plenty of other good brands available.
After completing install, I used an IR temp gun to determine if the reading was accurate, and tried it at multiple temperatures. From what I could tell, it seems to be pretty spot on.
The only anomaly I've seen is if I'm driving in the rain/wet roads. The sensor gets splashed with water and that seems to lower the indicated reading. However the water is probably also getting on the oil coolers and thus lowering the temp a bit, but I think that it's mostly an indication error.
Basically, it's accurate enough.