Does anyone make an oil cooler upgrade? I remember seeing someone post that 40 or 60% of the engine cooling is done through the oil. I've also seen quite a few posts stating if you increase hp you definitely want to upgrade cooling.
If it's 60% I would rather upgrade my oil cooler before my radiator for sure.
All I could find in a search was one guy suggesting a B&M trans cooler that had more surface area. The trans coolers I have seen don't look like they would be as efficient as the stock oil cooler.
I was thinking about welding two stock oil coolers together with some kind of tube in there for the bypass to function correctly. Unfortunately my stock oil cooler is banana shaped from the last owner ditching the car. I am scared to try to bend it back because it doesn't leak now.
Any links, prices, suggestions appreciated.

Oh, the application is AutoX. Started with an '86 base.

 

The Mazda Factory Race Engine Oil Cooler can be bought from Racing Beat. Ironically enough, It doesn't have the Oil Bypass Thermo Valve that I am having problems with now. (Current Thread).

 

The oil cooler is responsible for about 40% of engine cooling. The stock oil cooler is VERY good, and will support a 20B making some pretty good power. So unless you do constant high RPM racing for hours at a time, the stocker will work just fine. If you DO race, then consider installing a second stock cooler above the first. I've seen it done, and it works very well. You will want to remove the thermostats in both coolers (and plug the resulting hole in the baffle with a bolt).

 

Wouldn't removing the thermostats (rather than spacing them up) lead to the bypass always being on operation???

It was my understanding that the path to the cooler is only open when the thermostat is in the up position, down or removed it would just flood through the end chamber.

 

You will want to remove the thermostats in both coolers (and plug the resulting hole in the baffle with a bolt).

Yep, it will. That is why you have to do what cake said.

James

 

According to Mazda about 30% of the engine's total cooling is handled by the oil cooler, but it's important to remember it's the only cooling the rotors and e-shaft get, as they can't be water-cooled.

However if you're worried about oil temps then get an oil temp gauge first. There's no point in upgrading the very effective stock oil cooler until you actually have an oil temp problem, which most people don't until they really lean hard on the engine.