[glamcem]

Depends on the repair. In my case, worst case scenario it will leak again and since we have tire pressure monitors, I am not worried

[Provoste]

moderators- please stop moving threads

[TrackClub]

Come on guys...this is getting a bit much chasing 1LE specific threads all over the place.

[Norm Peterson]

Originally Posted by TheRealJA105

. . . tire companies no longer honor their speed rating once repaired.

There isn't complete mfr consensus on this. Some companies will consider that the speed rating is maintained, subject to certain restrictions. Others will void the speed rating. And a few others will downgrade the speed rating somewhat.

A table of individual mfr positions is at the bottom of the page linked below. Don't overlook the notes at the bottom of that table.

https://www.tirerack.com/tires/tiret...jsp?techid=225


Norm

[glamcem]

Moderators can you please move this back to 1LE sub section? Since all the comparison and the data will be based on the SS 1LE suspension so 1LE specific. Although it can be a good resource for other cars it won't be apples to apples.

[TheRealJA105]

Originally Posted by Norm Peterson

There isn't complete mfr consensus on this. Some companies will consider that the speed rating is maintained, subject to certain restrictions. Others will void the speed rating. And a few others will downgrade the speed rating somewhat.

A table of individual mfr positions is at the bottom of the page linked below. Don't overlook the notes at the bottom of that table.

https://www.tirerack.com/tires/tiret...jsp?techid=225


Norm

Thanks Norm, that is very helpful. Makes me feel a little bit better if something ever happens and I still want to track.

[Norm Peterson]

If it makes you feel even a little bit better than that, I ran my first few track day events (plus thousands of street miles) with a DIY-repaired Goodyear Asymmetric tire (I think the June 2014 Camaro5/AutoInterests Mid-Ohio event was the last for those GY's). Zero difference in air-holding capability or in any other measure of tire performance or durability that I could ever tell.


Norm

[glamcem]

It was a busy day yesterday I took my car to Chase Race for extending the upper camber bolt hole to get more camber. Thanks Provoste for all the information

After extending the hole a little bit we would add additional .6 degree camber upfront I also asked Doug (from Chase Race) to add little bit of toe out up front to help the steering feel/response for turn in. Hopefully car will be better in at the corner entry and mid corner. I have two more events coming up (June 4th at the Ridge and June 9th at the ORP) so hopefully these will help


Front wheels look completely tucked in

[TrackClub]

Grats on the increased camber Cem!
Is that toe out in F and toe in R?
Have you tried running 0 toe in F?
Asking as I am heading for alignment on Monday. Thx!

[glamcem]

Originally Posted by TrackClub

Grats on the increased camber Cem!
Is that toe out in F and toe in R?
Have you tried running 0 toe in F?
Asking as I am heading for alignment on Monday. Thx!

That is correct (toe out for front and toe in for rear)
I did try running 0 toe but at the same time I was maxed out at -2.4 degree camber so hard to tell how much of a difference it made but I assume it should be very minimal since it's only .05 degrees.

[glamcem]

Update: (2017/6/14)

I finally had a chance to compare the all three tires. I did my third event with the NT01s (305/325s) .

Which one is the best tires/setup of all three? Well, the answer is "it depends". They are all very close but with very different driving characteristics/slip angles. It's somewhat easier to rotate with the NT01s and being able to go full throttle at the corner exit sooner than the others. Thanks to the additional grip in the rear with 325s. This however becomes a bit disadvantage at the ORP since gears are a bit longer than the Trofeo Rs which makes me alter the shifting points and possibly cause some time because of that.

In terms of lap times, I believe the lighter and a bit more heat resistant Trofeo Rs will have the advantage on the tighter courses with a lot of body weight transfer such as ORP. No wonder I did my best lap at the ORP with this setup.

However, on a faster course where I can use additional grip in rear such as Ridge (RMP) NT01s felt faster. I didn't use the OEM setup at the ridge but I wouldn't be surprised if it would match my best time with the Trofeo Rs there since the overall feel was better.

In short, for the best overall tire and streetability I would still pick the OEM wheels and tire combo. Especially if you want to keep just one set of tires and wheels. Our MRC suspension calibration is based on that OEM tire/wheel setup anyways.

If you can get a dedicated track tire/wheel setup however, going with wider NT01s might be better in terms of overall lap times and to fight with understeer up front. It's just so much fun driving NT01s but when the track conditions are hot be ready to put your best lap after the warm up lap or 2nd or 3rd lap. I am not saying they overheat like most street tires like OEM or RE71Rs but the optimal lap times (in all the cars that I've tried NT01s previously) was when they're relatively cooler.

Trofeo R driving characteristics didn't really impress me a lot. I could definitely feel the softer sidewall or softer feel of the tires compared to OEM and NT01s. However, weight and gearing advantage (3% shorter gears vs 1.5% shorter gears on NT01 with 5 lbs additional weight on each corner) is very noticeable. Although, I couldn't get on the throttle as early as the NT01s once I did it was quicker on the straightaways and easily make up for that. It just didn't feel right or enjoyable to me. They're also expensive


I have to note though, I didn't have the -2.9 camber up front with the OEM setup or the Trofeo Rs so there may be a slight advantage there.

I did 1:54.9 at the last event at the ORP with the 305/325s NT01s. It was a warmer day than the last time I used Trofeo Rs there and did 1:54.7. Notice how easy to rotate the car with throttle and the different slip angles:


I hope this helps

[TrackClub]

Nice write up Cem! Thanks for all the analysis.
I suppose the bottom line here is that stock G3 don't really give up that much performance wise vs the other 2 choices? Would you agree?
Mid next month I should be able to contribute some thoughts on stock vs Cup2s. Ciao!

[glamcem]

Originally Posted by TrackClub

Nice write up Cem! Thanks for all the analysis.
I suppose the bottom line here is that stock G3 don't really give up that much performance wise vs the other 2 choices? Would you agree?
Mid next month I should be able to contribute some thoughts on stock vs Cup2s. Ciao!

you're welcome.

Let's say, in terms of lap times, the performance difference is not that much noticeable on a tighter course like ORP. I need to add though, I could only do one full session at the ORP with the Trofeo Rs so maybe I could shave a bit more with the Trofeo Rs due to it's weight advantage there.

At the Ridge, where longer sweepers and straights, I could carry more speed with 325s and be on the full throttle earlier. Once it's fully warmed up, I could literally floor on the gas pedal on the 1st gear with the 325 NT01s in the rear

Please share how they compare to OEMs once you try the Cup 2s and make sure you don't ever go below 27 cold psi with them

[TrackClub]

Thx for the advice Cem. Will report once I get a few days on each tire. Cheers!