Tracking the F type R
#122
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I understand the question Jaguny - it does seems unusual. But my circumstances were unique.
I ordered the Porsche GT4 to replace a very nice Cayman GTS I had. Basically, the cars were about the same price - so that seemed like a no-brainer. The GT4 was $89k.
I took Euro delivery of the GT4, had an awesome tour in Europe including two days on the Nurburgring. And, had some quality track time when I got it back home including Daytona and NOLA. Then, I decided to leave a company to start my own boat business and thought it was prudent to sell the GT4 while people were still paying MSRP for a used car (I had no idea nearly 2 years later they still fetch MSRP!). So, that put me on the sidelines while I focused on my new business.
Then, one day I was poking around a Jaguar showroom and asked if they had any good deals. The salesman said they had a new F-Type R that just came back from the body shop as it has been involved in a "track accident". Hmmm, I thought a new car that was damaged?? I smell a DEAL! They offered me an incredible number and I showed the car to my wife. It was love at first sight for her.
So, that is how I ended up going from a GT4 to the Jag.
I did not plan it, it just happened! It has opened my eyes to the other worlds that exist outside of Porsche and on the track, I believe it has made me a better driver learning how to adapt.
I ordered the Porsche GT4 to replace a very nice Cayman GTS I had. Basically, the cars were about the same price - so that seemed like a no-brainer. The GT4 was $89k.
I took Euro delivery of the GT4, had an awesome tour in Europe including two days on the Nurburgring. And, had some quality track time when I got it back home including Daytona and NOLA. Then, I decided to leave a company to start my own boat business and thought it was prudent to sell the GT4 while people were still paying MSRP for a used car (I had no idea nearly 2 years later they still fetch MSRP!). So, that put me on the sidelines while I focused on my new business.
Then, one day I was poking around a Jaguar showroom and asked if they had any good deals. The salesman said they had a new F-Type R that just came back from the body shop as it has been involved in a "track accident". Hmmm, I thought a new car that was damaged?? I smell a DEAL! They offered me an incredible number and I showed the car to my wife. It was love at first sight for her.
So, that is how I ended up going from a GT4 to the Jag.
I did not plan it, it just happened! It has opened my eyes to the other worlds that exist outside of Porsche and on the track, I believe it has made me a better driver learning how to adapt.
Last edited by Matttheboatman; 05-01-2018 at 12:17 PM.
#123
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I took my British Design Edition (RWD) coupe to MSR Cresson and did a day out there. Great time as usual. That might be it for the Pirellis. I had two days at COTA and then this event on them. Still no reliability issues at all with the car after 6k miles. Two videos below. One with Lotus Exige and one with 430whp S2000.
Last edited by IlMostro796; 05-02-2018 at 03:44 PM.
#124
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[left]I took my British Design Edition (RWD) coupe to MSR Cresson and did a day out there. Great time as usual. That might be it for the Pirellis. I had two days at COTA and then this event on them. Still no reliability issues at all with the car after 6k miles. Two videos below. One with Lotus Exige and one with 430whp S2000.
Regarding tires, I did burn through my front Michelin Cup 2s. Only had 4 track days on them and about 3,000 street miles. Hmmm let me do the math $900/4 = $225 per track day - ouch!!! The front left is beginning to show some cord on the edge. Barber's has a reputation to eat front left tires going up the hill at turn 3. The rears are still serviceable after 8 track days.
#125
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Nice laps Mostro!!! Keeping up with a Lotus and a S2000 on those twisties is not easy. You are very composed!
Regarding tires, I did burn through my front Michelin Cup 2s. Only had 4 track days on them and about 3,000 street miles. Hmmm let me do the math $900/4 = $225 per track day - ouch!!! The front left is beginning to show some cord on the edge. Barber's has a reputation to eat front left tires going up the hill at turn 3. The rears are still serviceable after 8 track days.
Regarding tires, I did burn through my front Michelin Cup 2s. Only had 4 track days on them and about 3,000 street miles. Hmmm let me do the math $900/4 = $225 per track day - ouch!!! The front left is beginning to show some cord on the edge. Barber's has a reputation to eat front left tires going up the hill at turn 3. The rears are still serviceable after 8 track days.
#126
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Nice laps Mostro!!! Keeping up with a Lotus and a S2000 on those twisties is not easy. You are very composed!
Regarding tires, I did burn through my front Michelin Cup 2s. Only had 4 track days on them and about 3,000 street miles. Hmmm let me do the math $900/4 = $225 per track day - ouch!!! The front left is beginning to show some cord on the edge. Barber's has a reputation to eat front left tires going up the hill at turn 3. The rears are still serviceable after 8 track days.
Regarding tires, I did burn through my front Michelin Cup 2s. Only had 4 track days on them and about 3,000 street miles. Hmmm let me do the math $900/4 = $225 per track day - ouch!!! The front left is beginning to show some cord on the edge. Barber's has a reputation to eat front left tires going up the hill at turn 3. The rears are still serviceable after 8 track days.
I’m not sure which tires i’ll get next. If they were street only, i’d get the Michelin Pilot Sport 4S, but if I’m just going to eat them up at the track, and have had good luck with the P Zeros, maybe i’ll get them again since they’re cheaper. Idk yet.
#127
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Would appreciate some help here.
PCA track days at Atlantic Motorsport Track near Halifax. 30-34* track of course much hotter.
started at 33# all around...up to 48# left front, the rest @ 44 or so..very slippery, plowing etc....lowered the pressure 5# went out again after 1.5 hrs. Much better....lowered another 5# and better still for the 3rd session.
checked the tires and shocked/amazed with the left front. Normal wear to the base of the tread on the outside but the tire seemed to have had something brushing on it past the base of the Michelin....almost 3" below the tread. No indication of wear...seemed as though it had rubbed against the inner wheel well (?). L front only.
nest day...started out at 32", went up to 38-40'# depending on the run...temp still in the mid 30* range.
now...both front tires have the same "brushing" wear.
No sign of anything rubbing...didn't curb either side.....what could it be ?
#128
#129
#130
#132
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Inside of the wheel shows somewhat less scuffing on the tire, but obviously "roll over" as mentioned by Unhingd.
Big question remains...tire pressure cold.
The Jag "track tips" says 30-32 for the Pirellis...35-32 for Continentals.....and post 22 mentions 30-32.....and so on.
i started at 33 or 34, and hot I had 48 on the L front...too hot and greasy. I dropped the hot temps twice by 5# or so each time and when the tires were cold the next am the pressures were 30#.... real low I was thinking.
Who has 4S tires on the track, and what do you use as cold pressures at the start of a track " experience " ?
What seems to be an optimal hot pressure ?
All in all it was a great couple of days...have to improve my throttle modulation, have to use the paddles more to be in the correct gear to accelerate out of a couple of t he corners where if not there was "turbo" type lag...avoid the urge to get on the throttle too early. Stuff like that.
All in all...a very good time indeed.
Big question remains...tire pressure cold.
The Jag "track tips" says 30-32 for the Pirellis...35-32 for Continentals.....and post 22 mentions 30-32.....and so on.
i started at 33 or 34, and hot I had 48 on the L front...too hot and greasy. I dropped the hot temps twice by 5# or so each time and when the tires were cold the next am the pressures were 30#.... real low I was thinking.
Who has 4S tires on the track, and what do you use as cold pressures at the start of a track " experience " ?
What seems to be an optimal hot pressure ?
All in all it was a great couple of days...have to improve my throttle modulation, have to use the paddles more to be in the correct gear to accelerate out of a couple of t he corners where if not there was "turbo" type lag...avoid the urge to get on the throttle too early. Stuff like that.
All in all...a very good time indeed.
#133
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I am running the Michelin 4S on a V8s convertable. I have a couple of track days at Atlanta Motorsports Park on them. I find that a cold air pressure of 31/32 gives me 38/38 on the track which works well for me. I agree that the heavy nature of the car chews up the front outside edges of the tires, but otherwise the wear is not too bad. I have also noticed that the tire goes through some sort of heat cycle on the tread surface, but I am not sure that it is unusual or impacts the performance.
#134
#136
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Prange (01-01-2019)
#137
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Prange (01-01-2019)
#138
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#139
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Also, the reason that the tires gain PSI when hot is the moisture in the air in the tire expanding. More humid environments will see more change in PSI when run hard, where as dry places tend to change less. Don't concern yourself whether the cold psi is "too low", the only thing that matters is hitting your goal when hot!
#140
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In picking tire pressure and alignment settings, tarmac compound, tarmac temperature, air temperature and driving style play a major role. The right way to pick the appropriate tire pressure is to take 5-10 laps and quickly use a tire pyrometer on all 4 tires. Ideally the temperature needs to be the same across the section of the tire. If it's colder in the center, you are running low on pressure, too hot... drop pressure.
I prefer to use nitrogen in my tires on and off the track, they are much more thermally stable.
I start every race with 34psi all the way around and adjust.
This is by far the most accurate unit I ever used Longacre Tablet Memory Tire Pyrometer 50650
I prefer to use nitrogen in my tires on and off the track, they are much more thermally stable.
I start every race with 34psi all the way around and adjust.
This is by far the most accurate unit I ever used Longacre Tablet Memory Tire Pyrometer 50650