[glamcem]

Originally Posted by seanblurr

It's not major, and it is within specs but you can very obviously see the tire bulging out and that's not ideal, especially for track use. If you compare it to the stock front wheel (285/10) you can see that it is stretched just slightly, this is perfect and in my mind is what contributes to the precise turn in the car seems to have. 305/10.5 isn't bad by any means, I just think a 305/11 would help that sidewall out just a bit and in theory bring back some of that precision. I could, in fact, be completely full of shit though For reference, I ran faster this past weekend with stock wheels/tires than I did the weekend before with 305 Nitto's. I did finally stop driving this car like a Miata, and the track was much better so I think those were the main factors. Ill be interested to see how the next event goes next weekend, I plan to swap back and forth to get a better understanding. Nitto's obviously have more grip, and will be faster once I figure out the best set up. That may be trying 305/325 to keep the stagger, or it might mean finding some 11's for the front. We'll see. I'm becoming more intrigued by the idea of using z28 wheels or looking at the zl11le wheels when they come out. MRR can't make me a 19x11 +11 it appears.
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I see. I was thinking that. I also had to adjust my S2000 lines and learn to be smoother once again (on the 1LE) as I didn't track a V8 for a while

I wouldn't worry about the wheel widths that much especially on tires like Bridgestone RE71R, R888 or NT01s since they already have stiff sidewalls. I know it may not be the ultimate size of wheels for those tires and can use a little bit of stretch but fitting 11" wheels up front and gaining a bit more weight are also need to be considered. For the reference, going with .5" wider wheels only means .2" additional section width and that's on 6" wheel the gain might be even smaller on a wider wheel.

For tires with softer sidewalls (Trofeo Rs..for instance), however, may benefit more from the wheel width

In other words, the feel of the steering wheel might be slightly better but it doesn't necessarily translate to faster lap times.

Note: The overall diameter of a steel belted radial is determined by the steel belts, there is little, if any, change to the overall diameter of the tire due to differences in rim width.

The industry rule of thumb is that for every 1/2" change in rim width, the tire's section width will correspondingly change by approximately 2/10".

For example: a tire in the P205/60R15 size is measured on a 6.0" wide wheel and this size tire has an approved rim width range from 5.5" to 7.5" wide. The tire has a section width of 8.23" (209mm) when mounted on a 6.0" wide wheel. If that tire were mounted on all of the rims within its approved range, the tire's approximate section width would change as follows:

Difference from
Measuring Rim RimWidth Approximate TireSection Width
0.5" narrower 5.5" 8.03"
Measuring Rim 6.0" 8.23"
0.5" wider 6.5" 8.43"
1.0" wider 7.0" 8.63"
1.5" wider 7.5" 8.83"

More info:
https://www.tirerack.com/tires/tiret...jsp?techid=200

[seanblurr]

It may not be any faster, or really make a difference at all. But if it does improve the steering feel then that would be worth it in my mind. Too bad there isn't a solid tire that comes in 295/305. Not interested in r888r, and I'm not willing to run R7's yet.

[Provoste]

Originally Posted by seanblurr

It may not be any faster, or really make a difference at all. But if it does improve the steering feel then that would be worth it in my mind. Too bad there isn't a solid tire that comes in 295/305. Not interested in r888r, and I'm not willing to run R7's yet.

Why not R888r? I hated R888, but I'm open to R888R. I've had friends run them and liked them. Haven't sampled myself yet.

[Th3Beast]

Originally Posted by MatthewAMEL

Yes, Darren Seltzer was driving that session. It's astonishing what the completely stock 1LE can do in a talented drivers hands.

That Viper was there Saturday, also. That's one mean looking car!

See you out there sometime!

That's right he did mention he was out the day prior!

I saved your video to my favorites so I can study it lol. Not too often we'll be able to find good in-car footage of an instructor level person piloting one of our cars.

I am absolutely floored what this car can do in stock form. After the rain delay we had yesterday, they did "open track" the rest of the afternoon for some seriously wet laps. I may or may not have been out there for 50+ mins straight (with a 5 min delay to retrieve a car) lol. Low fuel warning sent me in for day. I went through an entire tank of gas after lunch.

[seanblurr]

Originally Posted by Provoste

Why not R888r? I hated R888, but I'm open to R888R. I've had friends run them and liked them. Haven't sampled myself yet.

From what I hear it's really no different except for a different tread look.

[glamcem]

Originally Posted by seanblurr

It may not be any faster, or really make a difference at all. But if it does improve the steering feel then that would be worth it in my mind. Too bad there isn't a solid tire that comes in 295/305. Not interested in r888r, and I'm not willing to run R7's yet.

I see. I didn't notice any awkward feeling on steering response with 305s up front (even with the Trofeo Rs) but it may feel better with wider wheels maybe

Originally Posted by Provoste

Why not R888r? I hated R888, but I'm open to R888R. I've had friends run them and liked them. Haven't sampled myself yet.

My friend who ran them is also happy and says they're better than the R888s. It's so hard to believe that they improved the tires by only changing the thread pattern but who knows
They're slightly more expensive than the Cup2s on 305/30/19 ($320 vs $360) so it'll be a tough choice next time. I've never ran with Cup2s personally but I see mixed reviews. It sounds like they're only good when they're fully warmed but for only a few laps. The fact that they weigh about 6 lbs less than the equivalent tires is also tempting (26lbs vs 32lbs)

[seanblurr]

They don't last nearly as long. Fellow track guy in his Zo6 had cup2's and they lasted a day and a half. The issue with the Toyo's is the compound and carcass though, R888's were still funky even when we shaved em to 3/32nds.

[mjk3888]

First place in Rookie class this week!

http://www.camaro6.com/forums/showthread.php?t=498883

[glamcem]

Originally Posted by mjk3888

First place in Rookie class this week!

http://www.camaro6.com/forums/showthread.php?t=498883

Congrats Great picture of the car also

[glamcem]

Originally Posted by seanblurr

They don't last nearly as long. Fellow track guy in his Zo6 had cup2's and they lasted a day and a half. The issue with the Toyo's is the compound and carcass though, R888's were still funky even when we shaved em to 3/32nds.

hmm very interesting, they were worn out on the outer edges maybe? I wonder what kind of camber and pressures he ran. I heard that they're very sensitive to pressures and should never be overheated but with correct pressures they last about 4-5 events. It's really bad that we don't have so many sizes available on real R comps :/ we miss all the good/affordable options (Hankook Z214/TD, Toyo RRs, ..etc) on 19 and 20" sizes

[smithers]

For anyone wondering, Track mode sound hit 95.4db so spent most of the day poking along in 4th gear past the sound tower. Other than that, it was a really fun day. The car is incredible.

Thank God for traction control, but I think it's a little too intrusive. I guess best to err on the side of safety.

Last PDR session is here: https://youtu.be/jX9hx4NRAoM

[Th3Beast]

Originally Posted by smithers

For anyone wondering, Track mode sound hit 95.4db so spent most of the day poking along in 4th gear past the sound tower. Other than that, it was a really fun day. The car is incredible.

Thank God for traction control, but I think it's a little too intrusive. I guess best to err on the side of safety.

Last PDR session is here: https://youtu.be/jX9hx4NRAoM

That looks like such a fun track. One day I'll get out there in a rental car lol.
The traction/stability control was intrusive because you just had the car in Track mode and didn't have any of the PTM modes engaged. Once you put the car in Track, then push the TC button twice to bring up the PTM modes (Wet, Dry, Sport 1, Sport 2, Race). Each mode progressively dials back the stability control to allow the car more power and yaw.

[mjk3888]

Originally Posted by glamcem

Congrats Great picture of the car also

Thanks! Here's the footage.

[seanblurr]

Originally Posted by smithers

For anyone wondering, Track mode sound hit 95.4db so spent most of the day poking along in 4th gear past the sound tower. Other than that, it was a really fun day. The car is incredible.

Thank God for traction control, but I think it's a little too intrusive. I guess best to err on the side of safety.

Last PDR session is here: https://youtu.be/jX9hx4NRAoM

If you are interested in some 90* bolt on elbows, let me know. No issues passing a 90db day here