[FrostZ]

The ZL1 cooling system is pretty well set from the factory to keep the car fairly cool even under heavy track use. The SS brake deflectors are a great upgrade to get some extra air to the brakes. The only real thing to watch out for is oil temps, on a stock car they can already be a bit warm at 250-275. This is fine for our cars but not particularly ideal as two issues can arise. The first is the "oil cooler" on the car is a liquid to liquid cooler using the engine coolant tied to the lower radiator hose to cool the oil. In reality it uses the coolant which gets to operating temp much quicker to warm the oil, it does little to cool it after that. If the oil temps get out of hand it will drag the coolant temps up too as they are tied together. The second issue is for a modified car, if any extra power is added especially with the OEM 1.7L blower the oil temps can get quickly out of hand. This will cause the aforementioned coolant temps to rise quickly as well. A solution to this has been detailed here on the ZL1 thread using a C&R oil cooler replacing the aux supercharger hx. By maintaining the oil temps we also save the coolant as the dual radiator setup on the car is extremely robust. I have personally undertaken this project and seen massive improvements in temperatures across the board on an OEM car with power mods on the way. While this is definitely not needed for most, especially the occasional track driver with a focus on enjoying the streets, its highly beneficial to those dedicated track rats out there like a lot of ZLE owners.