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lexan or glass windshield

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Old Dec 26, 2006 | 06:24 PM
  #1  
Iroc Adio's Avatar
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lexan or glass windshield

i recent got a crack in my windshield and it wont past at the track. i was looking at the percys lexan speedglass. they say stock glass is 108lbs and speedglass is 31lbs so i would be taking out 77lbs. the only thing is that i do drive the car on the street sometimes. and does lexan fade fast?
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Old Dec 26, 2006 | 07:51 PM
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Car: 86 Trans Am
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lexan windows scrqatch up quick and are not supposed to be used on the street fpr any reason. a small rock can go right through it, and they are not very strong
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Old Dec 26, 2006 | 11:03 PM
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get glass - I don't think lexan wil pass a DOT inspection of your state requires it. Anyway, lexan will crack/scratch very easily. It is usually only used on track only cars.
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Old Dec 26, 2006 | 11:20 PM
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Car: '82 formula clone, 95 saab 900se
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a glass windshield doesn't weigh 108 pounds, unless i'm stronger that i think, but i can pull a windshield out and pick it up pretty easily, i would say at best the glass windshield weighs 50-70 pounds. and a lexan windshield would weigh around 20 pounds probably.
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Old Dec 27, 2006 | 01:33 PM
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Car: 89' IROC-Z
Engine: LO3
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PERCY IS THE BEST

You guys must not know about these.

http://www.percyshp.com/index.php?op...id=3&Itemid=33

SCRATCH RESISTANT AND SHATTERPROOF....EXPENSIVE BUT WORTH THE WEIGHT AND LOOK. On a 3rd gen you lose 72 lbs if you replace all windows with speedglass. This is the kit I am buying.

1/4" Front w/ all others 3/16"01117-43$ 1,425.00

SPEEDGLASS is 50% - 75% lighter than glass
(depending on thickness)

SPEEDGLASS is extremely shatterproof.


SPEEDGLASS has excellent optical clarity.

SPEEDGLASS windshields and windows are coated on both sides with a very scratch resistant coating.


SPEEDGLASS windshields and windows are formed to factory curvature of steel bodies.

SPEEDGLASS windows are approximately 1" over sized in all directions bigger than factory glass windows.

SPEEDGLASS has an extremely hard, non-porous surface that sheds water very well and is very resistant to any and all chemicals, fuels and oils used in the racing industry!

WHY CHOOSE SPEEDGLASS OVER UNCOATED LEXAN ?
• HIGHLY SCRATCH AND CHEMICAL RESISTANT
(RESISTS VIGOROUS RUBBING WITH STEEL WOOL!)
• 50%-75% LIGHTER THAN GLASS
• FLEXIBLE
• SHATTERPROOF
• HIGHER RESISTANCE TO PITTING THAN UNCOATED LEXAN
• THE BEST IN OPTICAL CLARITY CAN BE CLEANED WITH STANDARD GLASS CLEANER ( NO EXTRA POLISHES OR CLEANERS NEEDED)
• EXCELLENT WATER SHEDDING CAPABILITIES
(WATER BEADS UP AND BLOWS OFF CREATING FANTASTIC VISIBILITY)
• WINDSHIELD WIPER FRIENDLY
----------
These windows are NOT DOT APPROVED.....THEY ARE ILLEGAL....

Good thing I dont have a window inspection. WOOOHOOOO. Even if so I'll just say I bought a window from a swap meet and thought it was just light. LMAO. But like I said I dont have that inspection.....just sometimes they will look at the smog and emission equipment.

Last edited by I H8 WWD; Dec 27, 2006 at 01:39 PM.
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Old Dec 27, 2006 | 01:42 PM
  #6  
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From: Cleveland, Ohio
Car: 89' IROC-Z
Engine: LO3
Transmission: 700R4
Axle/Gears: 10-Bolt/2.73
Originally Posted by Iroc Adio
i recent got a crack in my windshield and it wont past at the track. i was looking at the percys lexan speedglass. they say stock glass is 108lbs and speedglass is 31lbs so i would be taking out 77lbs. the only thing is that i do drive the car on the street sometimes. and does lexan fade fast?
Didnt realize you already said Percy.....GO WITH THEM. Maybe not the front windshield.....or just get it thicker....like I am doing. 1/4" thickness....PLUS ITS SHATTERPROOF, so like they say above.....lexan will break.....yes lexan will......NOT SPEEDGLASS

GOOD FOR TINT TOO.
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Old Jan 5, 2007 | 07:45 AM
  #7  
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From: Milwaukee, Wisconsin
Car: 87 Iroc Z28
Engine: 355 TPI
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Originally Posted by I H8 WWD
SPEEDGLASS windows are approximately 1" over sized in all directions bigger than factory glass windows.
So does this mean that all of them will need to be trimmed to make them fit? They dont give a whole lot of info on the parts like, if the rear hatch will remain functional or if it will need to be kept closed. Also they dont show the weight savings on the other windows, I would imagine the rear hatch glass would be the heaviest one.
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Old Jan 5, 2007 | 08:28 AM
  #8  
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From: Cleveland, Ohio
Car: 89' IROC-Z
Engine: LO3
Transmission: 700R4
Axle/Gears: 10-Bolt/2.73
Originally Posted by PonyKiller87
So does this mean that all of them will need to be trimmed to make them fit? They dont give a whole lot of info on the parts like, if the rear hatch will remain functional or if it will need to be kept closed. Also they dont show the weight savings on the other windows, I would imagine the rear hatch glass would be the heaviest one.
The reason for the oversize is to insure perfect fit...when you take your window to the window shop they will know what to do. Yes the hatch most likely will weigh more...but not for sure. I have just e-mailed asking about weight of each window in each size. I will update when they get back to me.
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Old Jan 5, 2007 | 11:42 AM
  #9  
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From: Cleveland, Ohio
Car: 89' IROC-Z
Engine: LO3
Transmission: 700R4
Axle/Gears: 10-Bolt/2.73
Here are the weights of each

Front Windshields:

1/8"= 10lbs.
3/16"= 14lbs.
1/4"= 17lbs.

Left Doors:

.093"= 3lbs.
1/8"= 5lbs.
3/16"= 7lbs.
1/4"= 9lbs.

Right Doors:

.093"= 3lbs.
1/8"= 5lbs.
3/16"= 7lbs.
1/4"= 9lbs.

Rears:

.093"= 10lbs.
1/8"= 14lbs.
3/16"= 19lbs.
1/4"= 26lbs.

COMPLETE KITS:

1/8" Front w/ all others .093"= 150lbs.
1/8" Front w/ all others 1/8"= 155lbs.
3/16" Front w/ all others 1/8"= 160lbs.
3/16" Front with all others 3/16"= 165lbs.
1/4" Front w/ all others 1/8"= 165lbs.
1/4" Front w/ all others 3/16"= 170lbs.

P.S. The two that are 165lbs each are true....One has all 3/16" and the other has one 1/4" and the rest 1/8" (Which I know you all know is smaller than 3/16" meaning lighter). Well your welcome.
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Old Jan 5, 2007 | 01:07 PM
  #10  
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"scratch resistant" and "shatter resistant" are not the same thing as scratch proof and shatter proof. Any lexan will scratch easy compared to glass. I wouldn't use it on the street no matter how much weight it saves. A little weight savings isn't going to matter with a 305 LO3 engine.
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Old Jan 5, 2007 | 01:43 PM
  #11  
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From: Cleveland, Ohio
Car: 89' IROC-Z
Engine: LO3
Transmission: 700R4
Axle/Gears: 10-Bolt/2.73
Originally Posted by 327_TPI_77_Maro
"scratch resistant" and "shatter resistant" are not the same thing as scratch proof and shatter proof. Any lexan will scratch easy compared to glass. I wouldn't use it on the street no matter how much weight it saves. A little weight savings isn't going to matter with a 305 LO3 engine.
Your just like every 350 owner.....RUDE. So since you speak before you read here is this.....

I want you to re-read this.......AIGHT (Say in high pitched black mans voice)

WHY CHOOSE SPEEDGLASS OVER UNCOATED LEXAN ?
• HIGHLY SCRATCH AND CHEMICAL RESISTANT
(RESISTS VIGOROUS RUBBING WITH STEEL WOOL!)
• 50%-75% LIGHTER THAN GLASS
• FLEXIBLE
SHATTERPROOF
• HIGHER RESISTANCE TO PITTING THAN UNCOATED LEXAN
• THE BEST IN OPTICAL CLARITY CAN BE CLEANED WITH STANDARD GLASS CLEANER ( NO EXTRA POLISHES OR CLEANERS NEEDED)
• EXCELLENT WATER SHEDDING CAPABILITIES
(WATER BEADS UP AND BLOWS OFF CREATING FANTASTIC VISIBILITY)
• WINDSHIELD WIPER FRIENDLY

Last edited by I H8 WWD; Jan 5, 2007 at 01:46 PM. Reason: Adding info
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Old Jan 5, 2007 | 02:14 PM
  #12  
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Wow, better than uncoated lexan. That doesn't say much. You can't even use windshield wipers on uncoated lexan without scratching the hell out of it. My 350 is still on the stand, a 327 is in its place at the moment in one of the cars. I own a 305 in my 3rd gen car so I am very familiar with how slow they are

Last edited by 327_TPI_77_Maro; Jan 5, 2007 at 02:21 PM.
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Old Jan 5, 2007 | 02:24 PM
  #13  
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From: Cleveland, Ohio
Car: 89' IROC-Z
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Transmission: 700R4
Axle/Gears: 10-Bolt/2.73
Post Below= Made Mistake

Last edited by I H8 WWD; Jan 5, 2007 at 02:33 PM.
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Old Jan 5, 2007 | 02:31 PM
  #14  
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From: Cleveland, Ohio
Car: 89' IROC-Z
Engine: LO3
Transmission: 700R4
Axle/Gears: 10-Bolt/2.73
Originally Posted by 327_TPI_77_Maro
I'm not a 350 owner (yet). I own a 305 in one of my cars so I am very familiar with how slow they are
I just like hearing people (kids especially in my area) go what kind of motor is that? Since they dont know SQUAT they say 350? tuned port? carbed? AND I GET TO KEEP SAYING NO NO NO NO NO. What is it they say.....I JUST say....ONLY LO3 motor....I NEVER HEARD OF THAT THEY SAY. So I laugh....and laugh again. I MYSELF DO WANT A 350.....but I am doing NO SWAPS. I want original motor size when I get it. My car came with an LO3 305 and so it stays....when I buy my GTA notchback (if I can) I want a 350 in that bitch.....and it'd be cool if someone already swapped in the t5 or t56 or even an original 5speed (as I saw one at a junk yard....I know it was stock because of the setup it had....LONG *** SHIFTER). Well just re-read my last post and you will see that these windows ARE SHATTERPROOF and VERY VERY VEEERRRYYYYY SCRATCH RESISTANT....I know that because of the STEEL WOOL.
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Old Jan 5, 2007 | 02:35 PM
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What grade steel wool? Finer steel wool is not aggressive at all. So you're going to keep the original engine size but put all plastic windows in? Good luck with it, really, I would be scared not having regular safety glass on the street.
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Old Jan 5, 2007 | 03:30 PM
  #16  
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From: Cleveland, Ohio
Car: 89' IROC-Z
Engine: LO3
Transmission: 700R4
Axle/Gears: 10-Bolt/2.73
Originally Posted by 327_TPI_77_Maro
What grade steel wool? Finer steel wool is not aggressive at all. So you're going to keep the original engine size but put all plastic windows in? Good luck with it, really, I would be scared not having regular safety glass on the street.
I know you didnt know nor did I specify......this car wont be driven that much....also as for replacing the front windshield.....IDK about that yet. But the others I am.....alllll windows will be 1/4" thick. Also the steel wool I couldnt even tell you.

Oh and by original size....I didnt mean stock...I am stroking this bitch and making it a 335 stroker then adding 100hp shot of NOS.....(not for a while though)

It'll be tight when done. I mean...this is my first car after all....maybe I should slow down. But thats the thing....I was always the one talking about dropping weight to my car to win....making the stock motor perform better than what it actually has....you know..

Lightweight:

Fenders, Doors, Hood, Hatch, Windows, Water Pump, Flexplate, Driveshaft, Torque Converter, radiator, REMOVED AC, remove rear seats, door panels fiberglassed, lightweight racing seats, full chrome-moly suspension....lightweight wheels, lug nuts (I know a little far but they're titanium), stems, intake manifold, headers, all ground effects will be re-made in fiberglass, and misc other items too.
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Old Jan 5, 2007 | 05:39 PM
  #17  
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Car: 1987 IROC
Engine: Destroked 377
Transmission: TH-400
Axle/Gears: 9inch with 3.70's
im really leaning toward the speedglass windshield. it is kinda expensive but its worth it. i do drive the car on the street but hey EFF it. with the weight reduction i got probably gain a tenth
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Old Jan 6, 2007 | 01:36 AM
  #18  
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Car: 89' IROC-Z
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Not a bad choice. I am just ordering the thickest pieces. Plus I will be able to post up about these windows then since nobody uses em'
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Old Jan 6, 2007 | 11:29 AM
  #19  
327_TPI_77_Maro's Avatar
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Where are you located? I have a great running rebuilt 305 that you can have to put in your car while you are building the original one. I'm swapping my 327 into the 3rd gen and my 2nd gen is getting a 350.
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Old Oct 2, 2008 | 08:17 AM
  #20  
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Re: lexan or glass windshield

Anyone have any updates on the Percys Speedglass?
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Old Oct 2, 2008 | 08:27 AM
  #21  
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From: Cleveland, Ohio
Car: 89' IROC-Z
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Axle/Gears: 10-Bolt/2.73
Re: lexan or glass windshield

Haha, forgot about this thread.

I would say NOT to go with the Percy windshield for street use, as street conditions are worse than at a track where its cleaned all the time and made sure to be safe...

So stick with a stock front windshield and if it comes down to it get the rest of the windows in Percy (Beware) that if you go with the side windows there might be some modifications as these windows (I havent measured) might not be as thick as stock windows (.25" is their thickest) so they might wobble more than the stock window...
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Old Oct 2, 2008 | 04:30 PM
  #22  
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Re: lexan or glass windshield

Originally Posted by Iroc Adio
im really leaning toward the speedglass windshield. it is kinda expensive but its worth it. i do drive the car on the street but hey EFF it. with the weight reduction i got probably gain a tenth
for a tenth you need closer to a 100 pounds loss. a will say that a glass windshield cant weigh more than 30 to 40 pounds. when i did mine is wasn't heavy at all. the extra money spent on the lexan, having it trimed up and installed isn't worth it. get the glass and spend the rest on other things that you need on the car.

my
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Old Oct 2, 2008 | 07:09 PM
  #23  
I H8 WWD's Avatar
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From: Cleveland, Ohio
Car: 89' IROC-Z
Engine: LO3
Transmission: 700R4
Axle/Gears: 10-Bolt/2.73
Re: lexan or glass windshield

Originally Posted by madhatter
for a tenth you need closer to a 100 pounds loss. a will say that a glass windshield cant weigh more than 30 to 40 pounds. when i did mine is wasn't heavy at all. the extra money spent on the lexan, having it trimed up and installed isn't worth it. get the glass and spend the rest on other things that you need on the car.

my
Every little bit counts though, but yes, id recommend getting a plain glass windshield (maybe tinted at the top or something) and use that "extra" money for some things that might be needed in a little bit? belts, hoses, plugs, oil change...

Here, ask Percy to send you a sample of their thickest piece, they will send 1 side of it coated and the other uncoated to show how scratch resistant it is compared to regular lexan....believe me, the coating helps alot, but not sure on daily use, such as rocks from semi's, salt, rain, dry, dirt and so on and so forth.
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Old Oct 2, 2008 | 09:16 PM
  #24  
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From: Wittman,Az
Car: 86 IROC-Z, '71 RS
Engine: 305 TPI/ 350
Transmission: 700R4/TH350
Re: lexan or glass windshield

ok, I am a bit of a perfectionist, so keep that in mind... I had speedglass in my 90 RS and it yellowed and scratched in just 6 months (about 1000 miles) even washing it left swirl marks. It also did not fit right up front. I was happy to get rid of it. It sounds like a good idea, but it only SOUNDS that way. Good luck, either way.
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Old Oct 2, 2008 | 09:25 PM
  #25  
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Re: lexan or glass windshield

What's the weight of the rear glass? anybody know? The SpeedGlass sounds good...do they make a pre-bent rear hatch piece?
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Old Oct 2, 2008 | 09:56 PM
  #26  
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From: Wittman,Az
Car: 86 IROC-Z, '71 RS
Engine: 305 TPI/ 350
Transmission: 700R4/TH350
Re: lexan or glass windshield

The rear weighs something like 15 pounds. Keep in mind you cant use your hatch lift-struts with the lexan hatch.
I forgot to mention, any speed above 70 the side windows pull away from the seals.
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Old Oct 3, 2008 | 08:18 AM
  #27  
I H8 WWD's Avatar
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From: Cleveland, Ohio
Car: 89' IROC-Z
Engine: LO3
Transmission: 700R4
Axle/Gears: 10-Bolt/2.73
Re: lexan or glass windshield

Originally Posted by drknow90rs_ss@y
ok, I am a bit of a perfectionist, so keep that in mind... I had speedglass in my 90 RS and it yellowed and scratched in just 6 months (about 1000 miles) even washing it left swirl marks. It also did not fit right up front. I was happy to get rid of it. It sounds like a good idea, but it only SOUNDS that way. Good luck, either way.
What thickness....

And if it was tinted do you think it would still yellow....as the light directly on it wont be as intense...but now that you say all this...

Time to e-mail Percy and ask questions.
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