Front tire damage in skidpad.

[andyk5]

Falken 660 with 5-6 trackdays, 28 psi hot. This happened on a Streets of willow skid pad excersize. I was pushing pretty hard trying to figure out the limits of the car and the tires. Getting a lot of understeer off very tight 180 degree turns. Second gear full throttle coming out of the turn would just push instead of oversteer. I think the speeds were a bit too slow and the weight shift to the back would grip the rear. Dry conditions plus low tire pressures….not the right thing to do on the skid pad. Sheered the thread right off.

Just ordered GT Radial sx2s from Walmart, lets see how they hold up.



https://imgur.com/a/UCdqDnF

[NoHaveMSG]

They were starting to delaminate and you kept running them. You can see it starting here. 28psi hot is really low to me. I ran 34-37psi. 5-6 days is pretty good out of a set. I got like 4 days.

[andyk5]

Originally Posted by NoHaveMSG

They were starting to delaminate and you kept running them. You can see it starting here. 28psi hot is really low to me. I ran 34-37psi. 5-6 days is pretty good out of a set. I got like 4 days.

I can’t read tires, what am I looking for? I wanted to decipher what the tire wear was telling me…Like what is delaminate? Is it the thread coming off or the way tire is wearing in a wave pattern?


Edit:Also would more camber (in addition to higher pressures) help here?

[NoHaveMSG]

Originally Posted by andyk5

I can’t read tires, what am I looking for? I wanted to decipher what the tire wear was telling me…Like what is delaminate? Is it the thread coming off or the way tire is wearing in a wave pattern?

That is a spot we’re you almost wore through the tread and it then pealed a chunk away. Then continuing to run on the tire it caught a spot like that and pulled a chunk of the tread away. Need to check your tires before every session.

Here’s a pic of one of mine.

[andyk5]

Originally Posted by NoHaveMSG

That is a spot we’re you almost wore through the tread and it then pealed a chunk away. Then continuing to run on the tire it caught a spot like that and pulled a chunk of the tread away. Need to check your tires before every session.

Here’s a pic of one of mine.

So lets say I catch it chunking like that, what do I do? Wait for cooler weather, increase pressure?

[NoHaveMSG]

Originally Posted by andyk5

So lets say I catch it chunking like that, what do I do? Wait for cooler weather, increase pressure?

Put new tires on, they are done at that point.

[TommyW]

Originally Posted by andyk5

Falken 660 with 5-6 trackdays, 28 psi hot. This happened on a Streets of willow skid pad excersize. I was pushing pretty hard trying to figure out the limits of the car and the tires. Getting a lot of understeer off very tight 180 degree turns. Second gear full throttle coming out of the turn would just push instead of oversteer. I think the speeds were a bit too slow and the weight shift to the back would grip the rear. Dry conditions plus low tire pressures….not the right thing to do on the skid pad. Sheered the thread right off.

Just ordered GT Radial sx2s from Walmart, lets see how they hold up.



https://imgur.com/a/UCdqDnF

to induce oversteer (rotate) you need to be braking properly and not accelerating, that will always push. Try that skidpad when they wet it. Use crappy tires with no traction. Skid pad is more car control exercise and not really where you look for the limit.

[andyk5]

Originally Posted by TommyW

to induce oversteer (rotate) you need to be braking properly and not accelerating, that will always push. Try that skidpad when they wet it. Use crappy tires with no traction. Skid pad is more car control exercise and not really where you look for the limit.

Yeah…I was “trying” to trail brake towards the tight apex and come out on the gas but did not get the result I was looking for. Next excersize was going around the white circles which would have been easier to break loose on but I did not make it that far. Tire shop was closed and the tire stores I called in the Lancaster area did not have anything decent in stock.

[TommyW]

Originally Posted by andyk5

Yeah…I was “trying” to trail brake towards the tight apex and come out on the gas but did not get the result I was looking for. Next excersize was going around the white circles which would have been easier to break loose on but I did not make it that far. Tire shop was closed and the tire stores I called in the Lancaster area did not have anything decent in stock.

get ahold of Nik Romano at Fast Sideways. A session there will be more valuable to you that all the new tires in the world.

[CSG Mike]

Turn your steering wheel less, coming out of the turn.

You're causing your own push.

[andyk5]

Originally Posted by CSG Mike

Turn your steering wheel less, coming out of the turn.

You're causing your own push.

I think this is very true. The setup was long straight, a car width of entry marked by cones, 180 tight turn marked by cones. I’d be coming in too fast and my steering wheel were usually was beyond 90 degrees and I’d get on the gas at that time….less steering engle would def have more grip.


Will try that next time.

[jflogerzi]

Why would you be use RT 660's skid pad stuff anyways. Get some cheap tires like you ordered

[CSG Mike]

Originally Posted by jflogerzi

Why would you be use RT 660's skid pad stuff anyways. Get some cheap tires like you ordered

So that it's a 1:1 translation rather than a close to 1:1 translation.

[andyk5]

Originally Posted by CSG Mike

So that it's a 1:1 translation rather than a close to 1:1 translation.

This…

also they were close to being done.


Now that I found out about 86Cup, I am going to try to compete in the Stock class, SX2s seem to be ok for stock, cheap and something I can learn on by getting as much track time as possible without breaking the bank as hard.