On the scales

dcdoug · #1 (**permalink**) 10-23-2009, 06:59 PM

My tire pressures are the same all around - about 26 psi, which was where the Ford dealer had set them that did the alignment. Will more psi or less psi increase the wandering/darting, or does that not really impact it specifically?

patrickt · #2 (**permalink**) 10-23-2009, 07:52 PM

Doug, as a general rule, the front tires on our cars are going to have a couple of pounds more than the rear. One way you can get a feel for the best pressure is by using a pyrometer to measure the temps on the inside, middle, and outside of your tires. You then adjust the pressure so the middle temp is as close to the other two as possible.

dcdoug · #3 (**permalink**) 11-08-2009, 07:49 PM

Quote:

Originally Posted by patrickt

Doug, as a general rule, the front tires on our cars are going to have a couple of pounds more than the rear. One way you can get a feel for the best pressure is by using a pyrometer to measure the temps on the inside, middle, and outside of your tires. You then adjust the pressure so the middle temp is as close to the other two as possible.

I adjusted the tire pressure today to more like 26-27 in the rear and 28-29 in the front (the pressure is exact in all tires, but I am not sure of the completely cold temp as I drove about 1/2 mile to the gas station before filling them, so they might have been warmed up slightly - will check again when they are cold). Slightly rougher ride, but the car handles much better. I think that was it. I will get the cross weights done at some point on the CACC scales too just to be sure, but it's much better now.

patrickt · #4 (**permalink**) 11-08-2009, 07:53 PM

Quote:

Originally Posted by dcdoug

I adjusted the tire pressure today to more like 26-27 in the rear and 28-29 in the front (the pressure is exact in all tires, but I am not sure of the completely cold temp as I drove about 1/2 mile to the gas station before filling them, so they might have been warmed up slightly - will check again when they are cold). Slightly rougher ride, but the car handles much better. I think that was it. I will get the cross weights done at some point on the CACC scales too just to be sure, but it's much better now.

Today was a nice day for a ride. I had her out for quite a bit just in case we don't get any more nice weather until I pop her in to the bag later this month (or maybe early December). High 60's is my favorite driving temperature.

dcdoug · #5 (**permalink**) 11-08-2009, 08:07 PM

Quote:

Originally Posted by patrickt

Today was a nice day for a ride. I had her out for quite a bit just in case we don't get any more nice weather until I pop her in to the bag later this month (or maybe early December). High 60's is my favorite driving temperature.

One of the nicest days of the year today. I could have driven all afternoon. It's not like the skins are worth watching. What a train wreck. At least they made an effort in the 2nd half so I didn't have to swear off them forever.

lloyds1 · #6 (**permalink**) 10-23-2009, 09:48 PM

Dennis Olthoff told me to run my TD's at 18psi, it seemed to make the car more compliant than running them at the higher tire pressure.

Also, remember that race tires need to get up to temperature before handling correctly.

Also, the fact that the north east has some pretty rutted out roads doesn't help either.

Quote:

Originally Posted by dcdoug

My tire pressures are the same all around - about 26 psi, which was where the Ford dealer had set them that did the alignment. Will more psi or less psi increase the wandering/darting, or does that not really impact it specifically?

Gunner · #7 (**permalink**) 10-23-2009, 09:55 PM

Quote:

Originally Posted by lloyds1

Dennis Olthoff told me to run my TD's at 18psi...

Man, you'll listen to anyone, won't you?