XRAY - Model racing cars

Last race meeting my car had really bad handling and any changes that I made didn't help. The car would over steer off power and sometimes on power, a few of the other drivers had a few problems with handling issues as well. The temp of the day was over 35 degrees C and a few Brushless sytems were shutting down due to heat. What things could I do to keep the tyres from over heating?
Here's my setup http://www.teamxray.com/xforum/xform/in ... tup=t1fk05

Make small holes in the rims with a body reamer, this will make the tire run cooler. Start with 2 and then make 4 if needed.

I'm going to try running 3 degrees anti-squat and run white springs on the rear, I needed to stiffen the rear because when running a mod the rear would to bottom out and make the car over steer. Would anti-squat stop this from happening?
I will also try running 40's instead of 36's and will drill more holes and make the exsisting holes bigger.
Thanks for your input.

anti squat could help in low grip conditions. When accelarating (out a corner) the car will be more stable, so you can go faster out.

The disadvantage is that the car, going into corners at a high speed will become unstable at a sertain point with anti squat.

But....it's worth trying.

Personally I feel no airgap is bad, but too much is often worse. The reason people recommend a big airgap is that it allows the tyre to move around a bit resulting in less stress being put on the rubber itself. Less stress means less heat build-up (the key is to keep the rubber "cool"). However air heats up very fast and is a good heat conductor. If you have airholes in the wheels that are large enough to continuously refresh the air inside then this is less of a problem but if the air inside stays hot then the rubber will heat up anyway.

That is why I tend to run softer inserts (mostly medium-soft) but with only a small airgap. The soft insert allows the tyre to move just like a big airgap does, reducing heat build up in the rubber directly. By running less airgap I prevent heat build-up in the air inside (the rubber insert heats up much slower) and thus further reduce the heat. To keep the car rolling I normally combine this with hard wheels.