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Old 01-24-2014, 01:35 PM   #562
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I am unsure what else to suggest other than running one car on streets and another car on r-comps doesn't make it a fair *track* comparo to any *track enthusiast* except the manufacturer marketing purposes.
It's a slippery slope.

Suppose the ABS calibration for four equal size Trofeos is different than for staggered GY G;2's (and I'm betting that it is). Do we then have to rework the Trofeo-shod ZL1's ABS so that the Trofeos would be equally effective under braking on the ZL1 as they are on the Z/28?

Where does it stop?


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Old 01-24-2014, 01:46 PM   #563
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It's a slippery slope.

Suppose the ABS calibration for four equal size Trofeos is different than for staggered GY G;2's (and I'm betting that it is). Do we then have to rework the Trofeo-shod ZL1's ABS so that the Trofeos would be equally effective under braking on the ZL1 as they are on the Z/28?

Where does it stop?


Norm
Don't know of ABS differences between a Camaro vs Vette, but on the latter (C5) one can run anything from 265 to 315, square or staggered without any issues at all. Folks run different size wheel/tire/compound combos for track vs street on many cars without running into ABS issues. It might not be 100% optimized, but it works well enough for faster lap times.
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Old 01-24-2014, 02:00 PM   #564
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Thanks for the link. Looking at a 2014 ZL1 brochure it lists a 5 spoke "bright" rim (the same as "polished" in the thread?), which according to the Registry are 11lb lighter vs the black which are also available on the SS. This of course doesn't match the actual test in the thread...so now I understand why folks issued the "ass-u-me"...comment. Is it possible that 2014 5 spokes are different from prior years? I wish the manufactureres would include such weights right in the brochures in the first place.
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Old 01-24-2014, 05:29 PM   #565
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You are correct, I've used a wrong term:

Easily done, but not much fun to have your feet held to the fire over it...is it?

Based on the rim weight info I could find, ZL1 5 spoke rims are 11lb lighter then 10 spoke black rims. So it would make the front 5 spoke rim weigh less than 25lb (black ones weight 27). Z/28 rims appear to be in the same range based on posted shipping weight. ZL1 Rears would be a bit heavier as they are wider than fronts.
Wrong...again... BOTH are forged aluminum, and of very similar weight. They ARE, however, substantially lighter than the CAST aluminum 20s found on the SS...

...and just so you don't spend endless hours PROVING this statement, ALL weights showing reduction are, in fact, based against the CAST 20s on the SS... which is considered the BASE V8 car against which the ZL1 and Z/28 are off-shots. Other +s and -s are generally, unless specifically noted, against the SS as well.

On the ZL1, '14 wheels are '12-'13 carryover...that means "the same"...

Last edited by LOWDOWN; 01-24-2014 at 05:56 PM.
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Old 01-24-2014, 05:52 PM   #566
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"Easily done" indeed, given even a GM brochure lists rim sizes as "wheels". And yes, not too much fun! Oh well...
Also, on my 11lb comment...according to the ZL1 GM site, it is a difference between the SS and ZL1....TIRES! Oh well...so much for accurancy of data on on other "official" sites...
Given all of the above, I do have to retract my "claims", as they are factually incorrect regarding ZL1 rims being as light as Z/28's.
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Old 01-24-2014, 05:55 PM   #567
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Thanks for the link. Looking at a 2014 ZL1 brochure it lists a 5 spoke "bright" rim (the same as "polished" in the thread?), which according to the Registry are 11lb lighter vs the black which are also available on the SS. This of course doesn't match the actual test in the thread...so now I understand why folks issued the "ass-u-me"...comment. Is it possible that 2014 5 spokes are different from prior years? I wish the manufactureres would include such weights right in the brochures in the first place.
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Old 01-24-2014, 06:04 PM   #568
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Part of the problem occurs when brochure writers are given sketchy data, or misinterpret what they do receive. Proof-reading at a consistently high level would be helpful...for ALL manufacturers. THAT is why the little disclaimer statement, at the bottom of the last page, exists.

Also, near-graduates of the Evelyn Wood Speed-Reading course may be a little too hasty to fully grasp what is being shared...
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Old 02-10-2014, 08:24 PM   #569
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I cannot wait to see one at a Cars and Coffee in the spring/summer
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Old 02-18-2014, 01:33 AM   #570
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You mean I have to have a disclaimer about expecting a dealer to carry/be able to order spare parts for a z/28?! Let's be serious and if you doubt dealers won't have key Z/28 parts on hand, then folks better not dream about taking their cars to a track. But I am sure the GM/dealer supply chain is smarter than that.
You're giving dealerships to much credit for what they keep on hand. You'll be amazed how often you'll hear "we'll have to order it"

If ss parts aren't sitting on the shelves z/28 parts won't be either.
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Old 02-28-2014, 08:09 AM   #571
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The trim piece on the steering wheel on some shots seems black instead of the silver on SS and ZL1
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Old 02-28-2014, 04:12 PM   #572
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The trim piece on the steering wheel on some shots seems black instead of the silver on SS and ZL1
I believe the interior trim is all black with metallic.
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Old 02-28-2014, 04:20 PM   #573
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Can we get this back on track to the Z/28 at the Ring? Every time I see a new post here, I hope it's to report the dry lap time.
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Old 02-28-2014, 04:23 PM   #574
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Can we get this back on track to the Z/28 at the Ring? Every time I see a new post here, I hope it's to report the dry lap time.
You and me brother, but it is still cold wet weather there.
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Old 03-04-2014, 05:45 PM   #575
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Can we get this back on track to the Z/28 at the Ring? Every time I see a new post here, I hope it's to report the dry lap time.
I think I watched a video (i think a McLaren video)

where he mentioned its like a 2 year wait list to get on the Ring due to all the races, track days, etc.

what supports this claim is why they actually did it in the rain, why not wait for clear weather.

so i doubt a dry time will come.
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Old 03-04-2014, 09:19 PM   #576
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They'll be back with the Z06...and others...
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Old 03-05-2014, 05:39 PM   #577
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Old 03-11-2014, 07:39 PM   #578
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I wonder if this had the Flowtie or the bowtie delete.
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