[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]

Hot outside on the LF is normal on a right turn course, hot inside on the RF is from camber during braking. Hot middle in the rear indicates too much pressure.

Temps overall seem low for A6's on a road course - was is cool/cloudy? Were temps taken by someone else immediately after stopping the car? Probe type thermocouple or IR?

The folks that I know running A6's on a road course regard them as one hot lap tires, for TT, not continuous lapping. You should be able to by with more on a short course like this one, but if they get greasy all of a sudden after a few laps they need to cool down.

My direct Hoosier experience was with R3S03's of 7yrs ago, I was running mid to high 30's cold pressure and the car would feel good for 5 laps and then go to grease. I took some good advice and dropped cold pressure to 27psi - the car felt a little sloppier on turn in but grip was equivalent and lasted the whole 15 lap race.