[JimMueller]

I took my daily driver to a little road race practice course today. Each lap was only a minute and I'd stay out there for only 5-10 minutes. The first session I just wanted to work on tire temps, then I let it cool down. I actually logged the second session and have some questions.

Water temp: I live in Florida, so I run 100% distilled water with maybe 1-2 bottles of water wetter. After 7 laps, I noticed the coolant temp was at the 3/4 mark so I brought the car in. The scan tool later revealed the temp had peaked at 244*. Isn't that a bit warm? Solutions?

Brakes: In the front I have standard C6 calipers, Trackbrackets, DTC-30 pads, new standard C6 rotors. In the rear I have Powerslot rotors and HPS pads. All stainless lines and using SRF fluid. While it didn't have a problem stopping, the pedal became easier to depress and started grabbing hard closer to the floor. I didn't like the feel of this, how do I remedy it?

The log also shows it was pulling 4* of timing on all WOT sections. I bet I have a knock sensor code (IMG:http://www.frrax.com/rrforum/style_emoticons/default/mad.gif)

[Blainefab]

Yes, there is a risk that a oil/water heat exchanger could leak and mix fluids. That potential exists in any OEM app that has an automatic trans cooler in the radiator - ie most passenger cars and trucks on the road. I accept that risk because of the huge advantage in efficiency of thermal capacity vs space required. Before I installed the Setrab tube cooler on Kens car I pumped the oil section up to 100psi and let it sit for a few days with no leakdown.

Assuming no manufacturing defects and proper installation (ie not overtightening connections), any mechanical disturbance of the oil cooler section internal to a radiator has likely already destroyed the radiator.

I haven't used a Ron Davis product, but I see that they are popular with the Vette race crowd. Their street car apps are expensive, moreso because of the extra tabs and fittings for the OEM mounts and plumbing and sender. A race radiator would require fab work to fit and plumb so at some price point you are money ahead with the plug & play.

I'll mention again that a trans cooler is not usable for an engine oil cooler - not enough flow capacity.