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Old 06-04-2013, 09:19 PM   #176
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Here you go
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Old 06-04-2013, 09:24 PM   #177
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Another one.

Sent from the fast lane!
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Old 06-04-2013, 09:44 PM   #178
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Tire Specs

FYI

305/35/20
12.3" Section width
11.5" Tread width
28.4" Diameter
735 Revs per mile

285/35/20
11.4" Section width
10.8" Tread width
27.9" Diameter
750 Revs per mile

http://www.tirerack.com/tires/tires....=yes&tab=Specs
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Old 06-05-2013, 10:51 AM   #179
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Originally Posted by Arodr395 View Post
I think I might do the same. How much was it to change the rear tires to 305's?
Purchased my tires from a local tire shop for $430 each. These Goodyear's are not only directional, but they are right and left side. Make sure your tire dealer is aware. (mine was not...)
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Old 06-05-2013, 11:45 AM   #180
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Purchased my tires from a local tire shop for $430 each. These Goodyear's are not only directional, but they are right and left side. Make sure your tire dealer is aware. (mine was not...)

Next time show them the TireRack price and see if they can cut you a better deal. I assume that is mounted and balanced but it seems a little steep.

How's the car feel with the set up though?
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Old 06-05-2013, 04:16 PM   #181
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Here you go
Hey are you running Fontana with me Aug 11th?
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Old 06-05-2013, 05:50 PM   #182
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Hey are you running Fontana with me Aug 11th?
Probably not, I would like to, but my Camaro is in the Midwest still.

I have been competing in Pro Touring events in the Midwest since early May. I am going back to run Optima Face Off at Road America in late June, then an event in Nashville July 4th weekend, and my Camaro will likely stay in Nashville area until Labor Day when LS Fest takes place, which is another Optima Qualifier event.

Eventually, will get to run with you, Doc and Blake at Fontana...but probably won't be till Late September or October for me to have my Camaro here.
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Old 06-05-2013, 05:59 PM   #183
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Sounds like your living the dream out there Yeah my Silver State race is in Sept,but speedventures is at Fontana on Nov,hopefully we can all tear up the track then.Have fun out there,i rode my bike at Road America bitchen track...crashed in Canada corner :(
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Old 06-06-2013, 08:21 AM   #184
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Sounds like your living the dream out there Yeah my Silver State race is in Sept,but speedventures is at Fontana on Nov,hopefully we can all tear up the track then.Have fun out there,i rode my bike at Road America bitchen track...crashed in Canada corner :(
Ouch, crashing is never fun...I'm watching as much video of people running Road America as I can to try and get familiar.

Depending on whether I get an invite to Optima before the Silver State, I may sign up for that one too in September, it is right after the LS Fest. Mike from Haddad Motorsports is also talking about running in the Silver State also, so you might have company at that one.
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Old 06-06-2013, 02:12 PM   #185
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That would be pretty cool. This race isn't the intensity of road racing on a track,but there is just something about having the middle of nowhere all to yourself.I mean 90 miles with no one in your way,and the whole road is yours,with my speed limit of 140,it just rocks.Good luck on the Optima thing.If you are actually going to be able to make this race,make sure you PM me and i will give you the info you need.
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Old 06-06-2013, 02:16 PM   #186
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Oh yeah, in the event you haven't seen this this is the start.
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Old 06-27-2013, 09:45 AM   #187
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Question: What do you all think of the same tire fit on aftermarket "heavier" wheels of the same size/dimensions? Do you think it will throw off the handling not being on forged wheels?
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Old 06-27-2013, 10:49 AM   #188
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Forged!
You'll decrease the control of the suspension with a heavier wheel. Look up the effects of increasing unsprung weight.
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Old 06-27-2013, 11:00 AM   #189
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Forged!
You'll decrease the control of the suspension with a heavier wheel. Look up the effects of increasing unsprung weight.
Im asking because I will be using the car as a DD in the cold weather months and need different wheels+tires but I want to keep everything the same size. But I won't be forking over $2500+ for the forged originals. Is it really that bad to use heavier wheels if you aren't going to ride the car crazy during the off season?
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Old 06-27-2013, 04:46 PM   #190
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In mild to moderate driving and maybe up to moderately hard, I don't think a small increase in wheel weight is going to matter at all.

Damping ratio is a square root function of mass, so increasing the unsprung mass from something like 100 lbs to 105 lbs (5 lb wheel weight increase) only affects the damping ratio by 2.5% or so. Unsprung mass is mainly tied to bump damping, and I suspect that ride quality over bumps could theoretically improve a tiny bit at the expense of the wheel 'overshooting' by some other tiny amount. Probably about the same as what OE wheels would feel/behave like after the OE shocks/struts have accumulated some miles.


FWIW, damping ratio is also a square root function of spring rate. Most aftermarket springs are substantially more than 5% stiffer than OE . . .


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Old 06-27-2013, 04:51 PM   #191
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In mild to moderate driving and maybe up to moderately hard, I don't think a small increase in wheel weight is going to matter at all.

Damping ratio is a square root function of mass, so increasing the unsprung mass from something like 100 lbs to 105 lbs (5 lb wheel weight increase) only affects the damping ratio by 2.5% or so. Unsprung mass is mainly tied to bump damping, and I suspect that ride quality over bumps could theoretically improve a tiny bit at the expense of the wheel 'overshooting' by some other tiny amount. Probably about the same as what OE wheels would feel/behave like after the OE shocks/struts have accumulated some miles.


FWIW, damping ratio is also a square root function of spring rate. Most aftermarket springs are substantially more than 5% stiffer than OE . . .


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I'll take what you said as a
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Old 06-27-2013, 07:29 PM   #192
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Laughed about what the fact that you're too stupid to do anything but quote engineers? Like I said it's funny how much you guys put on people that designed a car like this. Everything they've done is just making up for what it should've been from day one.

everyone knows you never buy a first run.

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Old 06-27-2013, 08:32 PM   #193
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Originally Posted by pr3dict View Post
Im asking because I will be using the car as a DD in the cold weather months and need different wheels+tires but I want to keep everything the same size. But I won't be forking over $2500+ for the forged originals. Is it really that bad to use heavier wheels if you aren't going to ride the car crazy during the off season?
The aftermarket 1LE knockoffs are supposedly not much heavier. Not enough to be an issue, and it's not like you will have "performance" issues in the cold anyway. You are going to notice a bigger difference in the tire (All Season vs Summer Only compound).
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Old 06-27-2013, 08:50 PM   #194
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Im asking because I will be using the car as a DD in the cold weather months and need different wheels+tires but I want to keep everything the same size. But I won't be forking over $2500+ for the forged originals. Is it really that bad to use heavier wheels if you aren't going to ride the car crazy during the off season?
In that case no issues at all.
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Old 06-27-2013, 09:23 PM   #195
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The same engineers also said the larger lower grille on the 2014 let more air in. Yet if you actually look at it the actual opening is the same if not smaller than the 2010-2013.

I guarantee if you put a ZL1 rear tire on a 1LE that handling would be better not worse.
Size isn't everything on the grille or tire.
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Old 06-27-2013, 11:03 PM   #196
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Are the rear tires on the 1LE wide enough? Because I know in certain photos the rear tires look too skinny.
This car with a 20x11 should have 295s back there not 285s. My BF Goodrich Rival 285 tire is like .5" wider than the Goodyears tread width , 10.5" vs 11.1".
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Old 06-27-2013, 11:13 PM   #197
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I'll take what you said as a
I got some 19" non forged made with MAT technology wheels that are like 9lbs lighter but 19x9.5" want them, 2 are for sale.
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Old 06-28-2013, 05:57 AM   #198
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There's some truth in all the posts above, I believe.

After much reading , I'm convinced that after much testing , the engineers (I'm using this term in a positive light) found that the 1LE handled the best with the current tire and wheel setup.

While the wider 305 rear tires would ultimately give the rear end more grip, they found that the stretched 285 rear tires, near the limit, allowed the 1LE to rotate slightly better in the turns with more nuetral handling, making it faster and more fun. If you can get a car to rotate in the turn, you can get back on the gas sooner than if the car is pushing. Of course, too much rotation--loose as hell--is slower too. If anything, the 1LE is balanced.

On the ZL1, the wider rear tire tires are necessary because of the extra weight and especially the extra power. Powah!!
Sooooooo wrong. I just actually experimented with this even as soon as just last week. Tighter fitment of a tire in the rear leads to increased understeer. Like I said not a 305 but a 295 rear would have been better. However that brand tire they used doesn't have a 295 option. "I guarantee if you put a ZL1 rear tire on a 1LE that handling would be better not worse." This is very correct. It would decrease rear end stability and the tight feel a bit but in return would increase rear end traction therefore giving the driver more confidence and increase cornering ability. I still like the 295 on an 11" rim option though, not as loose as a 305 and a tad more neutral feel over the 285.

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Old 06-28-2013, 06:41 AM   #199
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This car with a 20x11 should have 295s back there . . .
Not with this car being close to 50-50 weight distribution and specifically intended to have only minimal understeer. Keep in mind that the 1LE was intended for about 2% of buyers, and that some of the differences from the SS that put it there obviously won't appeal to everybody (and consciously were not intended to). This is one of the big things.

Unless you're going to run 295's all around, which would probably call for 10.5" front wheels.


A 285/35 tire is a legitimate size to be fit to 11" wide wheels. Yes, 11" is the max recommended width for them, but what that means is that there are no technical reasons for not running that combination on this car.

Appearance preferences and prejudices do not count as "technical" reasons. They're valid as far as how you'd build up your own car from the SS level, but not for the way the 1LE should be built generally.


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Old 06-28-2013, 07:15 AM   #200
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Cody, im not sure what you're problem is,but would you like to settle this at the track? I will be at Fontana Aug. 11th So bring what ever set up you want,and we will see what the correct set up is. Here is a little video of why C5 gave me homepage(thanks C5) March 2013.This isn't because the tire set up is wrong!

4:17 you can't pass spec Miatas, not allowed .
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