Just got back from the track, and got to test the oil cooler!
EDIT: Ignore the oil temp conclusions below. I was being fed fake oil temp data from fake OEM oil temp sensor.- I forgot the rain shield under the hood scoop in first 2 sessions. The impact to the oil temp was about 5 degrees F.
- Having a separate oil cooler seems to be helping radiator a bit. The coolant temps vere almost no different than regular driving temps. The most I saw was 210 degrees if I recall correctly. This also helps the transmission. The most I saw was about 230 degrees.
- When I first tried the car at this (same) track last month, I was able to hit 280+ degrees after 4-5 laps. Within the same time-frame, I hit about 260 degrees with the new oil cooler. However, the oil temps kept climbing as I kept lapping.
- Since it was an open track day, I decided to do a torture test. I started a session and had no breaks or cool-down laps for about 20 laps (~40 minutes).
- During the torture test, the oil temp seemed to stabilize at about 284-285 degrees. It never went above that.
- During cool-down laps, the cooler shed about 30 degrees F off oil temp per lap.
So, here you go, it definitely helps, but I think it's still a bit disappointing. For the climate I run my cars in (Pacific Northwest), this should be sufficient, but if I were to live in Arizona or somewhere else with a similar climate, I'd install the OEM cooler back, and install this cooler with (1) an oil filter relocation kit and (2) oil filter sandwich with thermostat instead. That way, both radiator and the oil cooler can work on the oil.
This torture test also had other consequences:
(1) G:2 tires after the event:
(2) Front brake calipers after the event:
(3) Brake fade! (Move on to next post)