Finally was able to get a little data on flow and temperature on my oil cooler. Can't afford inline temperature sensors so ended up using a meter with the temp probe sitting directly behind the cooler. I was able to position the probe behind the inlet of the cooler for one set of readings and behind the outlet of the cooler for a second set of readings. Here's a picture of how it was positioned, gotta love duct tape.
http://www.bikepics.com/pictures/886953/ Here's how I mounted the meter
http://www.bikepics.com/pictures/886952/Here's the information
Inlet Temp Speed mph Outlet Temp
Degrees C
40-41 50 37-40
47 60 41
48 70 37
48 75 36
Start/Stop in Traffic
52-54 52
Air temperature was 26 degrees C at the start of the ride. I allowed 15 miles at 60 mph for a warmup ( steady at 41 degrees) and rode 20 miles one way for the inlet test and 20 miles back the other way for the outlet test with the bike in 5th gear.
What does it mean? well start/stop traffic was when the air around the cooler got the hottest, no big surprise. There seemed to be some, 3-4 degrees C, cooling at 40 to 50mph. Above 60 mph the temp difference increased to almost 10 degrees C and stayed about the same up to 75mph.
I also noticed that under WOT both the inlet and outlet temp would rise quickly by about 8 degrees C, seemed that the higher the engine rpm the hotter the cooler would get. There is not a lot of data here but it seems that the cooler is working it's best at highway speeds.
I also was able to check the flow thru the cooler at 1500 rpm. Here is a couple pictures of the test chamber I set up.
http://www.bikepics.com/pictures/886954/ http://www.bikepics.com/pictures/886955/ The chamber has a total volumn of 550cc and took 45 seconds to fill. This gives a flow of .73 liters per minute. The oil pressure gauge on top of the chamber read 12 psi. I couldn't run any more flow tests cause the clear tubing got real soft real fast when the hot oil hit it and I didn't want to risk a hot oil blowout. I'm happy to answer any questions about the test and cooler setup, hope this made some enjoyable reading even though I couldn't get the columns of the temp chart to line up.