Barbara_S

I have a team challenge this weekend - 4 drivers autocrossing in my car - and the weather wil be 20-25 at night and 42 for a high for the day. It won't be wet - that's the good point.

I'm wondering if v710's are going to have any grip. The course will be in a parking lot - so it will be short. I doubt heat will generate and I haven't used r-compounds on cold days before.

any thoughts or advice -
tia, Barbara

TommyBoy72

Yes possibly depending how close the runs are together and if its windy. I often will do runs with lower than normal air pressures to allow more squirm to generate more heat. The hard part is putting down the power until they get some heat. If its windy and you don't have tire or car wrap/banket, good luck retaining any heat.

Bill Dearborn

Depending on how many cars/drivers you may be OK. Having 3 other people warming your tires between the times you drive may make you more than competitive. Without the other people the tires would slide all over the place and street tires might actually perform better.

Bill

Aardwolf

You could use a small heater to blow on the tires.

97C5inSD

My last auto X of the year was cool and only me driving the car and well a good 10 mintes or better before i got my runs of 3 i left my car just idle most of the time which helped with warming the tires i also ran a bit higher pressure. and that seemed to help since i wasn't getting enough heat i think to get them to where they normally was inflated too.

Best of luck

JiminVirginia

I agree, especially with the last line. Get a tire warmer to help you or go on street tires.

Barbara_S

Thanks for the replies. I appreciate it.

Solofast

1. Start with lower pressures, -3 to -4 from usual for starting cold and go from there. As the temps come up bleed off some, but as you reach 100 degrees of tire temp you should be close to normal pressures.

2. Get some tire blankets or make some from the stuff that you can get at Home Depot (aluminum bubble stuff).

3. Wrap the tires before you run and let the engine idle, that will heat the fronts pretty well, but remember that the rears will likely be stone cold and you have to be careful to start with lower pressures and be gentle on the first two runs.

The biggest issue is getting some heat in the back tires. And no, spinning them off the line doesn't seem to help much.

With four drivers you should be able to get a good bit of heat into the tires, watch your temperatures, if you go over 120 or so they will go off and you will be slip sliding around from too much heat.