"ZR1 Wheels are Spun Forged Wheels" - Mind Boggling/Incredulous
12-05-2017, 02:42 PM
#41
Team Owner
12-05-2017, 05:27 PM
#42
Le Mans Master
These guys have been on it! ;)
Cry babies aside -
https://www.corvetteforum.com/forums...available.html
(The ZO6 wheels Suck - move-on!)
https://www.corvetteforum.com/forums...available.html
(The ZO6 wheels Suck - move-on!)
Last edited by johnglenntwo; 12-05-2017 at 05:28 PM.
12-05-2017, 05:56 PM
#43
Safety Car
https://www.corvetteforum.com/forums...06-weight.html
12-05-2017, 07:09 PM
#44
Your car looks like an ST2 class C5. C5s in that race class weigh 3,000lbs plus minus 50lbs:
https://www.corvetteforum.com/forums...06-weight.html
https://www.corvetteforum.com/forums...06-weight.html
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skank (12-09-2017)
12-05-2017, 11:59 PM
#45
12-06-2017, 10:11 PM
#48
12-06-2017, 10:22 PM
#49
Le Mans Master
I've Googled the Hell out of this! ;)
The C7 ZO6 wheels just plain Suck!
From what is being attested to they just aren't safe on this car!
Last edited by johnglenntwo; 12-06-2017 at 10:26 PM.
12-06-2017, 10:23 PM
#50
Except they are not, I literally bent two just by riding curbing on track first day out, they didn't even have a chance to hit one pothole. When I did hit a pothole with a new set both wheels on that side bent to the degree that they vibrated at 40mph. I would say I even got lucky, some guys had cracks in the wheels and couldn't hold air.
Yes one could buy forged wheels aftermarket. However Chevy is losing here big time. Where other mfg can design classic wheel designs that owners want to run out of the box and never remove, Chevy guys are forced to ditch the OEM look. It is important.
I bent both the OEM C7 Z and the C7 GS wheels, two each. Expectations are built on prior experience are they not? Why would you expect any different?
In a way you are correct, you can build a strong spun cast wheel. However, Chevy wants it all a light weight wheel, a wide one, run flats, cars loaded with 3,600 lbs of content, and at the end of the day are not willing to spend a penny on a forging. The solution is to make them heavier or go forged.
Almost everyone's car that road races weighs less than 3,560 lbs, as I expect your car does.
Yes one could buy forged wheels aftermarket. However Chevy is losing here big time. Where other mfg can design classic wheel designs that owners want to run out of the box and never remove, Chevy guys are forced to ditch the OEM look. It is important.
I bent both the OEM C7 Z and the C7 GS wheels, two each. Expectations are built on prior experience are they not? Why would you expect any different?
In a way you are correct, you can build a strong spun cast wheel. However, Chevy wants it all a light weight wheel, a wide one, run flats, cars loaded with 3,600 lbs of content, and at the end of the day are not willing to spend a penny on a forging. The solution is to make them heavier or go forged.
Almost everyone's car that road races weighs less than 3,560 lbs, as I expect your car does.
Anyone who knows anything about wheels at all knows you, OP, and those disappointed in flow formed wheels on the ZR1, have very good reason to be disappointed.
Flow formed wheels are the new low pressure cast wheels. They still have a LP cast face and although the grain structure of the barrel is close to that of a forged variant... They are by far not the same wheel as a forged wheel. Not even close. Better than full LP cast, but that’s it. Nothing more. They are BARELY more light weight than full cast if even at all. Usually close to the same, but if so only a hair because the face is still cast and requires more mass to achieve strength.
They are extremely cheap, now the same price point as full LP cast as well. The GT350 gets a carbon fiber wheel option and GM goes flow formed. What a joke for the halo car. They should have at least offered the option.
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12-06-2017, 10:32 PM
#51
Le Mans Master
The Spokes tell the story! ;)
These new wheels represent the first time the SC Corvette didn't get reinforced spokes, and it is the biggest power, of course!
Forged wheels for the SC Vettes mirror that!
Forged wheels for the SC Vettes mirror that!
Last edited by johnglenntwo; 12-06-2017 at 10:37 PM.
12-06-2017, 10:34 PM
#52
Race Director
I thought the zr1 wheels are fine. The car is pretty impressive although I'd prefer no rear spoiler as it's a little over the top for me.
Jmo but anyone foolish enough to dismiss the new ZR1 is off their rocker...imo
Fabulous car and even my friends with mclaren s etc are impressed with the zr1.
Only on these forums do we hear people bitch about the zr1 as an economy sports car...
The corvette engineers do an amazing job,
Jmo but anyone foolish enough to dismiss the new ZR1 is off their rocker...imo
Fabulous car and even my friends with mclaren s etc are impressed with the zr1.
Only on these forums do we hear people bitch about the zr1 as an economy sports car...
The corvette engineers do an amazing job,
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dgerstel (11-21-2018)
12-06-2017, 11:54 PM
#53
Safety Car
Thread Starter
Anyone who knows anything about wheels at all knows you, OP, and those disappointed in flow formed wheels on the ZR1, have very good reason to be disappointed.
Flow formed wheels are the new low pressure cast wheels. They still have a LP cast face and although the grain structure of the barrel is close to that of a forged variant... They are by far not the same wheel as a forged wheel. Not even close. Better than full LP cast, but that’s it. Nothing more. They are BARELY more light weight than full cast if even at all. Usually close to the same, but if so only a hair because the face is still cast and requires more mass to achieve strength.
They are extremely cheap, now the same price point as full LP cast as well. The GT350 gets a carbon fiber wheel option and GM goes flow formed. What a joke for the halo car. They should have at least offered the option.
Flow formed wheels are the new low pressure cast wheels. They still have a LP cast face and although the grain structure of the barrel is close to that of a forged variant... They are by far not the same wheel as a forged wheel. Not even close. Better than full LP cast, but that’s it. Nothing more. They are BARELY more light weight than full cast if even at all. Usually close to the same, but if so only a hair because the face is still cast and requires more mass to achieve strength.
They are extremely cheap, now the same price point as full LP cast as well. The GT350 gets a carbon fiber wheel option and GM goes flow formed. What a joke for the halo car. They should have at least offered the option.
Maybe you taking the time to educate those commenting incorrectly will bear fruit. Good luck. I've tried with limited success.
Rick
12-07-2017, 12:21 AM
#54
Le Mans Master
BullCrap! He needs to have "Forged" Defined for him! ;)
http://www.victorequipmentwheels.com...che-wheels.php
A company I worked for used to OEM CAST/machine these wheels for Chevy. Four different part numbers and My special tooling to accommodate and facilitate all of that!
Last edited by johnglenntwo; 12-07-2017 at 08:54 AM.
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12-24-2017, 06:24 AM
#55
Melting Slicks
Member Since: Nov 2000
Location: Merritt Island Florida
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Maybe they're locked into a contract with a specific supplier for the whole C7 line?
Personally I love th wheel design. Looks ripped off a Ferrari but still love them.
Raced many years on '02-'04 Z06 wheels which are spuncast and I know my car generates forces much higher than this new street car. We run 315 Hoosier A7s.
weight and g forces = stress on wheel...
dia on wheel also has come into play... a 20 inch with the same material strength will suffer catastrophically long before a 17 inch with same material and strength...
12-24-2017, 10:31 AM
#56
Le Mans Master
Real world strength!
Of course there can also be quality control and process problems that could have them negotiating away robustness. This is likely the problem!
No-Way this is happening in the Top ZR1 Vette now! Hopefully they won't mark them up too much, but, if they do it probably will be because of them really being forged, and/or ending up stronger, and not them being ZR1 wheels.
Last edited by johnglenntwo; 12-24-2017 at 03:32 PM.
12-24-2017, 02:44 PM
#57
Team Owner
The obsession with forged wheels on this board baffles me. The arrogance that goes with it is hysterical to me considering you’re buying an economy sports car. Crazy tall gearing, skip shift, dod, not to mention Chevy quality.
Spin forged are just as strong as forged. They pass the same strength tests as forged. HRE Jullian confirmed this. They are light weight out on the barrel, where the rotating mass is most important.
Spin forged are just as strong as forged. They pass the same strength tests as forged. HRE Jullian confirmed this. They are light weight out on the barrel, where the rotating mass is most important.
Times are tough and your back in a GS? Then you call a ZR1 an ECOMONY sports car is that why you BOUGHT a GS????? People are so off base they really need a reality check!
Last edited by 3 Z06ZR1; 12-24-2017 at 02:53 PM.
12-24-2017, 10:26 PM
#59
Safety Car
Maybe they're locked into a contract with a specific supplier for the whole C7 line?
Personally I love th wheel design. Looks ripped off a Ferrari but still love them.
Raced many years on '02-'04 Z06 wheels which are spuncast and I know my car generates forces much higher than this new street car. We run 315 Hoosier A7s.
12-26-2017, 01:57 PM
#60
Safety Car
I'm well aware... I built it. My target min comp weight with me in it and min fuel load was 3150. Never said the car was as heavy as a C7Z, but that it would generate comparable forces. The wheels aren't indestructible but won't bend from normal use... takes a very hard curbing, but then even the best forged wheels bend. At some level wheels are a fuse... you'd rather the wheel bend instead of suspension breaking.
I've never seen someone come out of an accident upon having a wheel failure saying "good thing it went, better than X or Y."
Truth is, you don't know what the weakest link is and if you did you wouldn't buid a car to fail in some fashion. Typically we try to beef up all areas on track so that NOTHING fails, especially wheels.
That is unless you are in a GM sponsored race team in the big leagues, building a car to JUST survive the race in order to be competitive.