GT3 Tire wear
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This may be a repeat question but my search came up empty.
997 GT3. 5500 miles. Tires are o.k. on the outside but cord showing through the inside. My race mechanic says the wear pattern has the look of a tire that is under inflated. His advice is to run 40 lbs in the rear and 36 in the front. Any one experiment with this? I just set the lbs, I have a speed run on the agenda for the way home.
Any input from the pro's would be great.
997 GT3. 5500 miles. Tires are o.k. on the outside but cord showing through the inside. My race mechanic says the wear pattern has the look of a tire that is under inflated. His advice is to run 40 lbs in the rear and 36 in the front. Any one experiment with this? I just set the lbs, I have a speed run on the agenda for the way home.
Any input from the pro's would be great.
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if you aren't tracking it, only corded inside, you have too much camber.
also depends on the pattern of the corded patch, you many have too much toe.
36/40psi sounds too high. rocommended is 29/33 iirc.
also depends on the pattern of the corded patch, you many have too much toe.
36/40psi sounds too high. rocommended is 29/33 iirc.
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Originally Posted by mooty
if you aren't tracking it, only corded inside, you have too much camber.
also depends on the pattern of the corded patch, you many have too much toe.
36/40psi sounds too high. rocommended is 29/33 iirc.
also depends on the pattern of the corded patch, you many have too much toe.
36/40psi sounds too high. rocommended is 29/33 iirc.
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Originally Posted by Colm
That's the cold temperature. Based upon my experiences I think 36/40 is probably a very good number (hot).
on streets, i can only raise the pressure by about 2psi.
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anyone have 5k miles on there tires?? If so are they wearing on the inside. Mine were shot, the wear pattern was way less as it worked to the outside of the tire.
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i have 4500 miles on mine.
alignment is per manual (track setting).
wear pattern is even across, with some chamfering suggesting the car pushes (which it does at the moment).
bear in mind 1/5 of those miles were on track, so it may have helped to even out wear. if i only drove on the street with that alignment, i would have more inside wear for sure.
alignment is per manual (track setting).
wear pattern is even across, with some chamfering suggesting the car pushes (which it does at the moment).
bear in mind 1/5 of those miles were on track, so it may have helped to even out wear. if i only drove on the street with that alignment, i would have more inside wear for sure.
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Just replaced mine at 6k miles. Street and 10+ track days. Have track alignment. Wore a bit unevenly... rears were corded on the inside and outside had a bit of meat still left. But I attribute that to the track alignment and all the street driving I do also.
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Originally Posted by RS 197
If I am not tracking the car, does it make sense to add air pressure to even out the tire wear??
does your alignment fit how you use the car.
my guess is it doesn't. if that's the case, change the alignment.
if it does, then perhaps your tire pressure was off. then i would correct the pressure, but i would not deviate from factory numbers too much.
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Inside edge wear is a function of camber AND toe in.
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Originally Posted by YA911Fan
Should a buyer just assume that a new GT3 (or any P, for that matter) being delivered needs an alignment?
I have no idea what the exact settings are but it's whatever came from the factory.
I have the Pirelli's, not sure if that means anything. And I'll report again after my first circuit.
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Originally Posted by YA911Fan
Should a buyer just assume that a new GT3 (or any P, for that matter) being delivered needs an alignment?
and i dont always trust the dealer's alignment guy either.
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Originally Posted by YA911Fan
Should a buyer just assume that a new GT3 (or any P, for that matter) being delivered needs an alignment?
my front ride height was 11mm higher than stock. alignment was off too.