With the Greddy oil cooler in place, we went back to Buttonwillow for another track day, and wow, the temperature-related power reduction issues we had were completely gone. No longer did the ECU dial back the power as the car got hotter and our power was consistent during an entire session. We also noted that the water temperature gauge was also reading noticeably lower, now it was at the low end of the normal scale even though this day was hotter than the last event, mid 80’s vs low 70’s. We believe that Greddy’s side mounting of the cooler and our ducting is what was allowing our cooling system to now perform very well. If you do not want to make the oil cooler duct, we recommend you pay a little more and get Greddy’s kit with the duct or at least have someone build you one. The duct is a key feature for the cooler’s effectiveness.
If you do some online research, having an oil cooler is essential for driving an FA20 powered car on the track and mandatory if you have an FI FA20. Remember that having synthetic oil that can withstand high oil temperatures isn’t the whole picture, the engine’s bearings losing integrity with temperature is the main issue we are trying to avoid.