Polycarbonate-Lexan Window Source???
 

I searched this topic and found several older posts listing Spektr, GT Racing, and a couple other source that may be "AWOL". Spektr seams to be out of business, and GT racing doesn't answer the phone. Maybe they're just out for the holidays, but it appears Spectr was GT's source and they're gone.

I'm trying to stick with Dave at TRE for all my parts, and he's been unbelievably patient with me through this backdating-resto process, but he only has the glue-in type louvered QTR windows. I'd like the ones that fit in the window frames, as well as side, rear, and windwings in the scratch resistant polycarbonate.

Does anybody have a "CURRENT" source for these, or a successful purchase?

Tap Plastics will cut them for you using your old window as a template. There is a Tap Plastics in Santa Rosa BTW.

If you want to make them yourself McMaster-Carr sells the material.

There is a plastics guy in near me in Ventura that will sell and cut the flat pieces (windwings and rear quarters) for me cheap, but the side windows and rear window have contours. I don't imagine it's easy, or looks good, squeezing flat pieces into those shapes???

Side windows have contours? That's news to me.

Yes, the door windows. They have a couple degrees of bend going vertically. I'm holding one in my lap as I type. it is not even close to flat.

I guess that is because I don't have any. :D

We left the paper backing on ours too long and the sticky stuff would not come off so we binned those. Kevin I think it was offered to cut some out of a sheet of Lexan. The old ones seemed flat.

I don't think my rear and rear quarter (and front quarter) windows are polycarbonate. They are way too cloudy (tiny scratches).

I bought mine from here and am happy with them:

Five Star Race Car Bodies

(if I recall correctly, it was another Pelican who referred me to them)

The 3/16 material will bend quite a bit, I bought some to build a targa top like this one:
http://forums.pelicanparts.com/porsche-911-technical-forum/491200-budget-targa-top-super-lite.html

http://www.mcmaster.com/#polycarbonate-sheets/=fhe4q2

Craig, you're chasing 911R louvered windows...

I got mine from Mark Allen at Vintage Excellence. Porsche Parts For Sale

http://forums.pelicanparts.com/uploa...1324633966.jpg

I've used these guys. Perfect fit, and the slider kits and pop it vents are pretty slick.

PORSCHE - Polycarbonate windows --- Plastics 4 Performance - Polycarbonate motorsport windows, mudflaps and accessories


http://forums.pelicanparts.com/uploa...1324636554.jpg

The flat 3/16" bends just fine into the window channel and even creates a little resistance, so it helps minImize rattling.

Craig,

We've used Shields for front windshields and were happy with the quality, they probably make side windows too or could make them if sent a sample (SHIELDS®). I believe Steve Alarcon makes and sells the quarter and rear windows so you might ask him too.

Cory

How well does the poly hold up to scratches? Is it just a matter of time until you have to replace it due to fogging or scratching making it difficult to see out of?

We don't make a rear R window set yet that fits chrome frames. Ours is just like the original R- glue in . The vents are placed too high on window to allow cutting the flanges off for use in the metal frames.
We do have the front vent "wing" fixed with bubble vents , for the doors. And we just completed our test on door windows that you can either set up as manual slide up (with a strap) or glue them in place for roll ups. The clarity and finish is superb. Pricing will be on our site next week
Coming soon for 2012 is the rear window replacement for oem, and by Spring we should have a correct R glue in rear window.

a word on lexan (polycarbonate) vs acrylic (plexiglass)- Lexan when scratched, cannot be polished and repaired. It does have better impact resistance over acrylic.
You can scratch acrylic and with polish it out. Our current products are acrylic

thanks!
Dave

Lexan is a brand, not a material.

Best is Makrolon from Bayer, but there are several different types (and so prices).

Cheaper Makrolon is just "raw", most expensive is high ultraviolet resistance and coated for anti-scratch (like these modern light lenses, almost undestroyable)

Abrasion resistant coated pc will give you the best protection from scratching. PC is a rather soft material. The coating is super thin but will provide protection for cleaning etc. Paper towels will scratch non coated PC over time giving them a hazed appearence.

By reviewing various threads and doing some research I conclude the following:

Polycarbonate: (lexan etc) Good impact resistance, poor abrasion resistance and expensive.

Acrylic: (Plexiglass etc) Poor impact, good abrasion and cheap.

So there are now abrasion resistant grades of polycarbonate: Lexan MR10 for example, which is even more expensive. 48" x 48" x 3/16 $300

Or, impact resistant acrylic: Plaskolite Optix for example, a little more expensive but still a bargain in comparison. 48" x 48" x 3/16 $50

I think Plaskolite Optix is an acrylic product.

I like good old glass. Resists blowing out of the car at high speed, relatively cheap, period correct, and most importantly, when coupled with a 240 lb driver it really doesn't matter. No scratches, either. Most of us really need to learn how to drive better to put that weight savings to use. I have a plastic rear window that I sucked into the car on the banking at Fontana. its bolted to my straps now. My windshield is glass. They are cheap to replace. No door windows. Vintage racer only.