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914World.com _ 914World Garage _ Lexan rear window.

Posted by: Series9 Feb 22 2005, 04:01 PM

Check it off the list.

I was putting this off, but it was easier than expected. It cost me $50 for a 55"x11" sheet of .250 Lexan. I then stopped by a friend's shop to trace a stock rear window onto the Lexan.

Once I sort out the covering for the firewall, there will be some additional rivits along the bottom.

Attached image(s)

Posted by: Series9 Feb 22 2005, 04:02 PM

last:

Attached image(s)

Posted by: Aaron Cox Feb 22 2005, 04:09 PM

i will move this to the garage.....

Posted by: Series9 Feb 22 2005, 04:11 PM

QUOTE (Aaron Cox @ Feb 22 2005, 03:09 PM)
i will move this to the garage.....

Ooops. Sorry about that.

Posted by: Rough_Rider Feb 22 2005, 04:14 PM

What weight difference did you notice between the glass & lexan ?

Plus is the metal strapping just a temporary thing while the butyl cures is it that going to stay? Is it really required??

Sorry for all the questions, just about to do this myself.

Posted by: Aaron Cox Feb 22 2005, 04:15 PM

no offense.... looks like something off a nascar

Posted by: Travis Neff Feb 22 2005, 04:20 PM

I got a 1/8 sheet of 4x8 lexan for about 80 bucks. Had to make a hi tech liner for the chicken coupe. I have some spare pieces that could turn into something useful?

Posted by: synthesisdv Feb 22 2005, 04:26 PM

QUOTE (Aaron Cox @ Feb 22 2005, 05:15 PM)
no offense.... looks like something off a nascar

the straps keep the window from blowing out (or in) when the car starts spinning at 100mph. Should have them on the windshield also.

that's why those NASCAR guys need them, they know a thing or two about going sideways and backward at speed.

Posted by: Series9 Feb 22 2005, 05:10 PM

QUOTE (Aaron Cox @ Feb 22 2005, 03:15 PM)
no offense.... looks like something off a nascar

There's no adhesive. The window is screwed and rivited in place. The aluminum strips are necessary because the Lexan is much more flexible than glass. They are the primary mounts and are rivited to the roll bar on top and screwed to the firewall at the bottom.

Not NASCAR, just race car.

Posted by: xitspd Feb 22 2005, 05:38 PM

QUOTE (914RS @ Feb 22 2005, 02:01 PM)
Check it off the list.

I was putting this off, but it was easier than expected. It cost me $50 for a 55"x11" sheet of .250 Lexan. I then stopped by a friend's shop to trace a stock rear window onto the Lexan.

Once I sort out the covering for the firewall, there will be some additional rivits along the bottom.

Nice work Joe! Did you get the wheels back yet? Any pictures? You are making great progress.

Posted by: rick 918-S Feb 22 2005, 06:04 PM

You should use some type of calk. maybe some tub and tile sealer. Nothing serious, just something to keep the water out when you wash that beauty.

Posted by: Series9 Feb 22 2005, 07:45 PM

QUOTE (xitspd @ Feb 22 2005, 04:38 PM)

Nice work Joe! Did you get the wheels back yet? Any pictures? You are making great progress.

No wheels yet. Those f'ers can't seem to deliver anything on time.

Tomorrow or Thursday.

Rick, what do you mean water? I don't have door windows...

Posted by: john rogers Feb 22 2005, 10:13 PM

One of these days when the rear window on the race car loosens again I plan to put in some lexan. Not for weight reduction, BUT just so I can make a small sliding opening like the 917's have. I plan to close it at the start of every race just like the movie........

Posted by: Eric_Shea Feb 22 2005, 11:18 PM

Looks nice Joe.

Make me one and send it up here.

Posted by: Series9 Feb 22 2005, 11:40 PM

QUOTE (Eric_Shea @ Feb 22 2005, 10:18 PM)
Looks nice Joe.

Make me one and send it up here.

OK, save your six until the fall so I can buy it.......oh, too late....

Posted by: Eric_Shea Feb 22 2005, 11:45 PM

I tried to hold out for ya. You just had some insane notion regarding fiscal responsability

Now we need ta make you a GT lid...

Posted by: campbellcj Feb 23 2005, 12:08 AM

I did the same project a few months ago. If the interior is already gutted, it's not too bad. I did seal the edges with clear silicone however. Instead of straps all the way across I just made some little aluminum hold-down tabs that bolt to the stock shoulder belt hard point. So far I have not noticed any flex or desire for the lexan to jump out of place. It sits fairly snug in the recess so would really have to flex severely to blow out the back.

I must admit however that I haven't tested the 100mph backwards thing...

Posted by: Series9 Feb 23 2005, 12:13 AM

QUOTE (Eric_Shea @ Feb 22 2005, 10:45 PM)
I tried to hold out for ya. You just had some insane notion regarding fiscal responsability

Now we need ta make you a GT lid...

No, I had a concept of financial suicide.

I don't need a GT lid, I need an RS lid. What's an RS lid?

Posted by: RON S. Feb 23 2005, 05:46 AM

QUOTE (Rough_Rider @ Feb 22 2005, 02:14 PM)
What weight difference did you notice between the glass & lexan ?

I put a lexan rear window in my 6 some time back.
I put the original glass on a digital scale and it's weight was 8-8-1/2 lbs.
I also used 1/4"lexan for the window,and after all the trimming to fit it's final weight was 4lbs.
Unfortunately,after I was done I miked the original window thickness,and it appears I actually should have used 3/16"lexan.Probably could of saved another lb. or so.

Ron

Posted by: Eric_Shea Feb 23 2005, 12:28 PM

QUOTE
What's an RS lid?

Carbon Fiber would be my guess...

Posted by: campbellcj Feb 23 2005, 06:33 PM

I'm pretty sure I used the 3/16" lexan, UV coated on one side. The weight difference vs the stock heated glass was nice but more importantly I can SEE out of it compared to the glue-encrusted cloudy formerly tinted glass window.

Posted by: Seventyfive914 Feb 23 2005, 10:38 PM

Hello. I'm late to the party on this topic, but this is one of the "things to do" on my list for my car. My project is moving very slowly but I'm making progress. Anyway, my question is if anyone is at the point in their project where you have your original rear window out to replace it with mylar or lexan, would you be kind enough to trace the outline of it for me onto some paper that could be folded up and mailed to me. I'll certainly cover the postage and toss in a couple bucks for your trouble. I recently sold both original rear windows that I had and only realized that I had forgotten to make a pattern until after I had shipped them, duh! Thanks, -K-

Posted by: Travis Neff Feb 23 2005, 11:25 PM

I have a spare rear window, I can trace it out for you - or if you want to pay shipping the window is yours (if I can dig it up, moving the garage stuff this weekend).

Posted by: Seventyfive914 Feb 24 2005, 06:01 PM

Thank you very much. I sent you an e-mail with my Zip, etc. Regards, -K-

Posted by: Travis Neff Feb 25 2005, 09:42 AM

OK, came across the glass yesterday. I will post the shipping info when I get that done (hopefully this weekend, or early next week).