Orthojoe's GT4 track thread and ramblings
09-08-2016, 02:53 AM
#856
Not sure why I can't get that to work: Video Link: https://www.youtube.com/watch?v=XD1SyDNX_Qs
How did that happen? I almost rotated a few times out of T2 with cold tires. Didn't have a problem at 10 then again I'm always at "Grandma" speed.
09-08-2016, 03:26 AM
#857
09-08-2016, 12:29 PM
#858
Any idea what happened?
I ran what was left of my OEM Dunlops on the GT4 into the ground this past weekend at COTA, which has a lot of high-speed sweepers... and even in a bit of very light rain. I pushed them hard, and twitched around to get a "feel" for their limits, and never felt anything unstable.
My car is stock, with middle bar settings and a mild streetable 1.8/1.3 alignment. I have no reference for their relative grip, but I found the stability & predictability to be quiet good. I ran them at 35 psi max, and this was where my most consistent times were found... an entire string of 2:37.xx laps (with a passenger) all within half a second of each other. They got greasy over 35 psi.
I ran what was left of my OEM Dunlops on the GT4 into the ground this past weekend at COTA, which has a lot of high-speed sweepers... and even in a bit of very light rain. I pushed them hard, and twitched around to get a "feel" for their limits, and never felt anything unstable.
My car is stock, with middle bar settings and a mild streetable 1.8/1.3 alignment. I have no reference for their relative grip, but I found the stability & predictability to be quiet good. I ran them at 35 psi max, and this was where my most consistent times were found... an entire string of 2:37.xx laps (with a passenger) all within half a second of each other. They got greasy over 35 psi.
09-08-2016, 12:29 PM
#859
Yeah I just wanted to get an idea of what the car is like stock. Will be going back to get more track adjustments made.
09-08-2016, 12:41 PM
#860
Yikes! Scary indeed. Setting up and entering t10 is definitely anxiety provoking. I had something similar happen with the gt3 when I made the mistake of running over the berm when it was still wet. Thank goodness for stability control.
I've only run dunlops on the gt3, but I really liked how they felt compared to cup2. The problem was they lasted only 2 track days. I ran higher pressures than the cup2, but there is some debate as to whether or not that is the proper thing to do.
I've only run dunlops on the gt3, but I really liked how they felt compared to cup2. The problem was they lasted only 2 track days. I ran higher pressures than the cup2, but there is some debate as to whether or not that is the proper thing to do.
My favorite tires are still the Trofeo Rs on my LT. Don't know if they're even an option for our cars.
I ran 30/34 f/r for first 2 sessions.. dropped to 30 all around for last session and it was worse for some reason.
09-08-2016, 12:42 PM
#861
LOL.. I could only think of that wall and how I wished I had a 6 point and my HANS on. See posts above for what I think happened.
09-10-2016, 02:10 AM
#863
Nordschleife Master
Thread Starter
Originally Posted by RDCR
Great day at the Thill 5 mile today - thanks for putting it on Joe!
looking forward to running with you again! I'm exhausted!!!
09-10-2016, 02:46 AM
#864
GT3 player par excellence
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09-10-2016, 11:34 AM
#865
Nordschleife Master
Thread Starter
09-10-2016, 05:06 PM
#867
09-10-2016, 05:17 PM
#868
Rennlist Member
Small request Joe: When you get your swift springs installed, could you measure the free length of the rear helper and put a few copies of the physician's desk reference on top of it until it compresses a half inch? (should be less than 30 pounds) I wonder what the stock helper rate and length are...
09-10-2016, 09:52 PM
#869
GT3 player par excellence
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^ your doc still uses PDR?
you need a real MD ;-0
you need a real MD ;-0
09-10-2016, 09:59 PM
#870
Nordschleife Master
Thread Starter
Originally Posted by mooty
^ your doc still uses PDR?
you need a real MD ;-0
you need a real MD ;-0
Keith, you just need me to stack a 30# weight on the spring and measure the height?