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Old 09-18-2015, 09:40 AM   #1
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When I first got started with HPDE I thought that as long as you didn't roll over on the shoulder you were good. I didn't realize that by the end of the day my hot pressures were up in the 40's and I wondered why I was sliding around like crazy. The first time I had a "hot" session with my tires right in the sweet spot (around 32 front and 34 back hot, 225/45/17 and 255/40/17 Hankook RS3) I was like WOW. What a difference. A friend has a 996 with PS2s and ran these really high GT3 pressures and did not bleed throughout the day sp he was wickedly high in the 40's, once I got him to bleeding he was like WOW too and ran his best times.

The downside is airing them back up for the drive home... if it is a long drive like 3 hours they will cool back down and go below 30 if I don't give them a little air before leaving out.

Steve
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Old 09-18-2015, 09:49 AM   #2
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Originally Posted by steved0x View Post
When I first got started with HPDE I thought that as long as you didn't roll over on the shoulder you were good. I didn't realize that by the end of the day my hot pressures were up in the 40's and I wondered why I was sliding around like crazy. The first time I had a "hot" session with my tires right in the sweet spot (around 32 front and 34 back hot, 225/45/17 and 255/40/17 Hankook RS3) I was like WOW. What a difference. A friend has a 996 with PS2s and ran these really high GT3 pressures and did not bleed throughout the day sp he was wickedly high in the 40's, once I got him to bleeding he was like WOW too and ran his best times.

The downside is airing them back up for the drive home... if it is a long drive like 3 hours they will cool back down and go below 30 if I don't give them a little air before leaving out.

Steve
I found similar results at the track and the last few AX I did.
I have been running Hankook Ventus V12 evo2's. They are great street tires, love them for canyon carving, but when they hot at the track or AX, they get really greasy and slippery. I found I was dropping PSI a lot. It would help.
At higher temps and then pressure, the tire does not give you the maximum contact patch, hence poorer performance

I just got some 17" wheel for track and AX and am planning on putting RS-3's on them. They came with brand new Sumitomo HTR ZIII's and I will run with them for a but until they are spent.

Tire pressure is really important for traction and a little change can make a big difference. Porsche builds in lots of understeer as it is "safer" for many drivers
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Old 09-18-2015, 10:26 AM   #3
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I just got some 17" wheel for track and AX and am planning on putting RS-3's on them.
You will love them!

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They came with brand new Sumitomo HTR ZIII's and I will run with them for a but until they are spent.
My sumis lasted a long time and even a few track days. Then I had to retire the fronts after over 30,000 miles and got a set of 225/45/17. The backs are still going strong with 15,000 miles on them. If you thrash them at the track (which would be very fun ) they will likely be much less.

I think a free set of Sumis is a perfect tool for feeling the limit and thrashing at a track Then when you get the RS-3 you will know more what a tire feels like on the limit and can quickly utilize the extra grip of the RS3.

I am going to a car control school the 27th with Florida Citrus Region and I am taking my sumis so I can explore the limit at a lower speed - I am looking forward to learning a lot. I think you did a similar school and got a lot out of it as well?

Steve
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Old 09-18-2015, 11:17 AM   #4
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Originally Posted by steved0x View Post
You will love them!



My sumis lasted a long time and even a few track days. Then I had to retire the fronts after over 30,000 miles and got a set of 225/45/17. The backs are still going strong with 15,000 miles on them. If you thrash them at the track (which would be very fun ) they will likely be much less.

I think a free set of Sumis is a perfect tool for feeling the limit and thrashing at a track Then when you get the RS-3 you will know more what a tire feels like on the limit and can quickly utilize the extra grip of the RS3.

I am going to a car control school the 27th with Florida Citrus Region and I am taking my sumis so I can explore the limit at a lower speed - I am looking forward to learning a lot. I think you did a similar school and got a lot out of it as well?

Steve
Yes, our local PCA calls it Performance Driving School. Best $350 I ever spent!
Its a 2.5 day event. 3 hours classroom Friday night. Multiple driving exercises all day Sat including wet skid pad and an untimed AX all day Sun.

You will be amazed at how great these cars are and how untrained you are. LOL
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Old 09-18-2015, 11:27 AM   #5
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You will be amazed at how great these cars are and how untrained you are. LOL
That is FACT, I am so far below the level of the car it's not funny But ever time out I get a little bit closer, it is a lot of fun
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Old 09-18-2015, 11:30 AM   #6
On the slippery slope
 
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That is FACT, I am so far below the level of the car it's not funny But ever time out I get a little bit closer, it is a lot of fun
It is a very slippery slope...

Next thing you know, AX and track time
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