Windshield For 1992 ZR1

[Willie C.]

How many points do you loose on your ZR1 if you have a regular Corvette windshield?

[Gary J.]

Re: Windshield For 1992 ZR1

I would think 20% for configuration which would be 5 points. If not dated properly would be another 20% which would be another 5 points. I am not a C-4 expert, but this is from what I have read on previous post about the windshield. I just helped a customer of mine source a windshield for a 95 ZR-1.

[Don H.]

Re: Windshield For 1992 ZR1

Windshields are in the Standard Deduction Guidelines. I would have to look how it applies to the C4s. Don't have them in front of me.
Google was my friend.
Looks like 50% deduct for OEM brand with incorrect tint.
Std Deduction Guidelines.
4. WINDSHIELDS, DOOR GLASS, ROOF PANELS, PLEXIGLASS & VINYL WINDOWS
No Originality Deduction: OEM as described in the appropriate year Technical Information Manual & Judging Guide, dated within 12 months prior to vehicle assembly.
Table of Originality Deductions:
• Deduct 20%---As above, excepting only the date
• Deduct 30%---OEM brand, later service replacement style with correct tinting, if applicable
• Deduct 50%---OEM brand, with incorrectly configured tinting
• Deduct 90%---1953-62 tinted front or side glass; or 1953-96 non-OEM brand replacement(s)or any year added tinting (film, etc.)The above 12-month timeframe allows for the exception rather than the rule. Most normal production time spans will usually fall within one (1) to six (6) months of vehicle build.Condition Scoring Note: If the condition of the windshield appears to constitute a potential safety hazard in the operation of the vehicle, such as cracks or excessive pitting, condition point deductions up to the full amount for that item must be made.

[Terry M.]

Re: Windshield For 1992 ZR1

How many points do you loose on your ZR1 if you have a regular Corvette windshield?

You might want to check the date code.

In 1990 a good friend and I watched (and participated in) the build of his 1990 ZR1. We watched as the robot placed sealant on the windshield and the workers placed it in the car. On the way home we realized they had installed a conventional windshield. We debated what to do about that as the car was still in Bowling Green. Our decision was to let it be since any subsequent windshield instillation would not be as good as this one and the date code would never be correct.

I had occasion to ask Paul Schnoes (I may have that spelling wrong), Bowling Green plant manager, about the ZR1 windshields and he insisted all 1990 ZR1s received the correct windshields. I knew better, and in a later conversation with Gordon Killebrew he concurred and said about a dozen 1990 ZR1s were built with the wrong windshields. Could that have happened in 1992? Check the date code before you remove the existing windshield.

Let us know what date code you find.

[David H.]

Re: Windshield For 1992 ZR1

How many points do you loose on your ZR1 if you have a regular Corvette windshield?

Is real issue delamination of original windshield?

[Terry M.]

Re: Windshield For 1992 ZR1

Yes that is a frequent issue.

[Willie C.]

Re: Windshield For 1992 ZR1

Hi Gary,
Thanks for the info. I didn't know that ZR1 windshields were still available.
Willie

[Willie C.]

Re: Windshield For 1992 ZR1

Thanks Don.
Willie

[Willie C.]

Re: Windshield For 1992 ZR1

Hi Terry,
Great story! I have heard so many times of things not being correct on the line at Bowling Green. I had a totally original 70 454 and when I was preparing it for a Top Flight I found a few strange bolt patterns that came from the factory. I am just looking at purchasing the car but wanted to check what I would have to do to get a Top Flight. I think this is a replacement windshield and not sure if it would be worthwhile deduction wise to try and get a ZR1 windshield.
Thanks,
Willie

[Willie C.]

Re: Windshield For 1992 ZR1

Hi David,
It's a replacement because of delamitation. Just wondering if worth trying to find a ZR windshield for judging.
Thanks,
Willie

[David H.]

Re: Windshield For 1992 ZR1

Hi David,
It's a replacement because of delamitation. Just wondering if worth trying to find a ZR windshield for judging.
Thanks,
Willie

Common problem. I have not seen a ZR-1 that does not have delamination issues - often severe. Attempts have been made to produce new replacement ZR-1 windshields - none successful that I am aware of.

Delamination severity does NOT appear to correlate with storage conditions. Salvage ZR-1 windshields will most likely have this issue as well. If you could find ZR-1 NOS in a box, it would also most likely have delamination.

Don Hooper's post #3 above is your guide. Originality/Condition points are 26/24.

just how severe is this delamination? If limited to upper corners, that would be an exceptionally good example.

Dave

[Terry M.]

Re: Windshield For 1992 ZR1

Hi Terry,
Great story! I have heard so many times of things not being correct on the line at Bowling Green. I had a totally original 70 454 and when I was preparing it for a Top Flight I found a few strange bolt patterns that came from the factory. I am just looking at purchasing the car but wanted to check what I would have to do to get a Top Flight. I think this is a replacement windshield and not sure if it would be worthwhile deduction wise to try and get a ZR1 windshield.
Thanks,
Willie

These cars, whether built at Bowling Green, St Louis or Flint, were put together by humans (for the most part). Humans make mistakes.

[Dino L.]

Re: Windshield For 1992 ZR1

Pyrolitic coated glass is what caused the delamination, LOF destroyed the last 4 pallets they had about 10 years ago. Did not want warranty issues. There will a very long road to a get a glass company to reproduce that part.... highly unlikely.and near impossible

[Willie C.]

Re: Windshield For 1992 ZR1

Hi Dave,
If I had the car judged, is it correct that you would loose all points for windshield if you had a replacement Corvette windshield and not the original or replacement ZR1 windshield?
Willie.

[David H.]

Re: Windshield For 1992 ZR1

Hi Dave,
If I had the car judged, is it correct that you would loose all points for windshield if you had a replacement Corvette windshield and not the original or replacement ZR1 windshield?
Willie.

Willie,

Below, I've copied Don Hooper's post of Windshield Standard Deduction Guideline #4 from his post above. ZR-1 had a "solar" windshield made by Libbey Owens Ford (LOF). Regular Corvettes also had a LOF windshield, but the "solar" tinting is different on ZR-1. (See pages 87 & 88 of 1992-1993 Judging Guide.) Judging points for this line are 26/24 for Originality and Condition respectively.

As Don noted in his post, a non ZR-1 OEM replacement would get a 50% deduction on Originality per Standard Deduction - as standard replacement would lack "solar" tinting. A new standard Corvette OEM windshield would be a 13 point deduction and as new, would have zero deduction for condition. Salvage yard (OEM) regular Corvette replacement would also be a 13 point deduction plus any additional points for condition.

Non OEM replacements, e.g. PPG, would be a 90% deduction. Presuming a new PPG replacement, there would be no Condition points lost as originality is at least 10%.

Dave

p.s. Original "solar" ZR-1 windshields would get no Originality points lost, but would loose Condition points depending on severity of delamination. Pick your poison!

Std Deduction Guidelines.
4. WINDSHIELDS, DOOR GLASS, ROOF PANELS, PLEXIGLASS & VINYL WINDOWS
No Originality Deduction: OEM as described in the appropriate year Technical Information Manual & Judging Guide, dated within 12 months prior to vehicle assembly.
Table of Originality Deductions:
• Deduct 20%---As above, excepting only the date
• Deduct 30%---OEM brand, later service replacement style with correct tinting, if applicable
• Deduct 50%---OEM brand, with incorrectly configured tinting
• Deduct 90%---1953-62 tinted front or side glass; or 1953-96 non-OEM brand replacement(s)or any year added tinting (film, etc.)The above 12-month timeframe allows for the exception rather than the rule. Most normal production time spans will usually fall within one (1) to six (6) months of vehicle build.Condition Scoring Note: If the condition of the windshield appears to constitute a potential safety hazard in the operation of the vehicle, such as cracks or excessive pitting, condition point deductions up to the full amount for that item must be made.

Last edited by Don Hooper (50543); January 18th, 2019 at 08:08 PM.