Care and feeding of Goodyear slicks?
01-30-2011, 05:00 PM
#1
Le Mans Master
Thread Starter
Care and feeding of Goodyear slicks?
While this isn't specifically Vette-related, I've got a new track car that I'm going to be autocrossing and DE'ing:
She's running a stock LS1/T56 with a 3.23 LSD diff out of a Cadillac SRX. Still debugging, but whooee what a ride!
I'm going to be running some Goodyear scrubs, 23/8/15, (roughly 215 width). The problem I'm running into is finding out what kind of tire pressures and tire temps to start at, and aim for at temp.
Anyone got any ideas?
TIA, and have a good one,
Mike
She's running a stock LS1/T56 with a 3.23 LSD diff out of a Cadillac SRX. Still debugging, but whooee what a ride!
I'm going to be running some Goodyear scrubs, 23/8/15, (roughly 215 width). The problem I'm running into is finding out what kind of tire pressures and tire temps to start at, and aim for at temp.
Anyone got any ideas?
TIA, and have a good one,
Mike
01-30-2011, 05:57 PM
#3
Drifting
Does Goodyear give any guidance on the best hot temp and pressure for their tires?
This Miata will put heat into the tires faster that a stock one due to higher accel and decell forces. I guess I would ask the other Miata drivers what their cold pressures are, then drop them by one or two psi. You will have to experiment a bit to get it perfect.
I've often thought I would want a track car with Miata handling and Corvette power. I've battled one or two of them on the track, and they were very hard to beat. Have fun.
This Miata will put heat into the tires faster that a stock one due to higher accel and decell forces. I guess I would ask the other Miata drivers what their cold pressures are, then drop them by one or two psi. You will have to experiment a bit to get it perfect.
I've often thought I would want a track car with Miata handling and Corvette power. I've battled one or two of them on the track, and they were very hard to beat. Have fun.
Last edited by bobmoore2; 01-30-2011 at 06:01 PM.
01-30-2011, 09:07 PM
#4
Le Mans Master
Thread Starter
This Miata will put heat into the tires faster that a stock one due to higher accel and decell forces. I guess I would ask the other Miata drivers what their cold pressures are, then drop them by one or two psi. You will have to experiment a bit to get it perfect.
I've often thought I would want a track car with Miata handling and Corvette power. I've battled one or two of them on the track, and they were very hard to beat. Have fun.
Thanks for the responses, and have a good one,
Mike
02-01-2011, 03:38 PM
#5
Racer
Member Since: Jan 2005
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I hope you upgraded the brakes, too.
Any Goodyear competition tire distributor should be able to give you good starting points on tire pressures. Go to www.racegoodyear.com and try the "distributors" tab.
Or...ask the guy you're getting the scuffs from. Even if he's got a car weighing another 1000lbs, his starting #'s will be close enough.
Any Goodyear competition tire distributor should be able to give you good starting points on tire pressures. Go to www.racegoodyear.com and try the "distributors" tab.
Or...ask the guy you're getting the scuffs from. Even if he's got a car weighing another 1000lbs, his starting #'s will be close enough.
02-01-2011, 07:08 PM
#6
Le Mans Master
Thread Starter
Yup. DBA-5000 slotted (not drilled) rotors with 4 piston Wilwood calipers up front. Larger rotors in back, using stock calipers on extensions.
Also, I decided to give the tire supplier a call tomorrow; good suggestion.
Have a good one,
Mike
Also, I decided to give the tire supplier a call tomorrow; good suggestion.
Have a good one,
Mike
02-01-2011, 07:23 PM
#7
Le Mans Master
How heavy is the car? How much HP?
On a banked track with a 2,500# car I would start with 18 on the outside tires, 16 on the left front and 17 on the left rear and then punch tem for temperature. On a hot day you should get 215 on the outside and about 205 on the inside and some where in the middle in the middle.
Go up about 2 psi on a flat track.
Jim
On a banked track with a 2,500# car I would start with 18 on the outside tires, 16 on the left front and 17 on the left rear and then punch tem for temperature. On a hot day you should get 215 on the outside and about 205 on the inside and some where in the middle in the middle.
Go up about 2 psi on a flat track.
Jim
02-01-2011, 09:02 PM
#8
Le Mans Master
Thread Starter
Jim,
Thanks for the info. I haven't weighed her yet, but in street trim she was 2500 before the conversion. My hope is for around 2650-2700 in track trim.
For autocross, where tire temps can be less than consistent, should I just go with the lowest pressure that keeps from rolling over onto the sidewalls?
One other thing: I know an old school pyrometer reads the temperature under the surface, but is an IR scanner useable?
Still gonna call the supplier tomorrow, but thanks for the info anyway. Gives my brain stuff to think about!
Have a good one,
Mike
Thanks for the info. I haven't weighed her yet, but in street trim she was 2500 before the conversion. My hope is for around 2650-2700 in track trim.
For autocross, where tire temps can be less than consistent, should I just go with the lowest pressure that keeps from rolling over onto the sidewalls?
One other thing: I know an old school pyrometer reads the temperature under the surface, but is an IR scanner useable?
Still gonna call the supplier tomorrow, but thanks for the info anyway. Gives my brain stuff to think about!
Have a good one,
Mike
