Lexan windows for 240Z
Posted 13 February 2010 - 11:45 AM
My questions are; 1) where do I get the stuff, 2) how much lighter is a lexan rear screen to an OEM screen, 3) is lexan much more noisy for a car, and 3) is Lexan easy to clean / polish and care for?
Posted 13 February 2010 - 04:59 PM
If you are in Melbourne perhaps speak to Martogg dandenong or polypacific the owners are related and someone in tech should be able to point you in the right direction for supply or an aftermarket manufacturer of sheet. Lynton
Posted 13 February 2010 - 05:58 PM
Posted 13 February 2010 - 07:36 PM
Posted 14 February 2010 - 10:02 AM
Keep the updates coming.
Posted 14 February 2010 - 07:41 PM
Posted 15 February 2010 - 09:58 AM
The rear screen is 1.8mm thick and obviously very light weight. I have held it place with screws around the edge and sitting on small alloy blocks so it looks right. As it is a race car there are no seals to worry about, nor do Icare about leaks with rain. The window does bow out at speed but not enough to worry about. If I am ever pinged for it I will run an aluminium strip from the top to bottom of the opening over the window to stop the bow.
The quarter windows are 3mm lexcan and cut to shape and fitted into the standard frames.
The door windows are 3mm thick lexcan and again cut roughly to shape and held place in the original frames with a leather strap over the window frame and push stud. Works very well, though the drivers window is usually pulled out when I am driving.
The big advantage is weight for me, and cost. The last shhet I got for the rear screen was around $60 from a sign writer, just look up perspex in the yellow pages and you will find a supplier near you pretty easily.
As ypu go thicker the weight does increase and the cost does go up.
I still use a standard glass windscreen for safety and also because perspex and lexcan are very hard to keep clean and unmarked, not really an issue on side or rear glass.
Posted 20 February 2010 - 07:06 AM
I called a mob in QLD and they told me that i should not use Lexan, but instead acrylic, as; 1) lexan scratches more easily, and 2) acrylic is easier to work with. They said they take an factory piece of glass, lay acrylic over it and then place the whole thing in the oven to uniformly heat it. The heat allows the acrylic to take on the form of the glass, the edges trimmed and voilla! you have a new light rear screen.
The point I wanted to highlight was that acrylic was suggested as the preferred item over lexan, and i think the generic name for the acrylic item is perspex.
Watch the brown hornet blog to see what I end up doing, as at this stage i need to check prices and availability in Sydney.
Posted 21 February 2010 - 05:33 PM
Keep in mind all my windows are flat and haven't been shaped to suit, again I don't care about the appearence compared to the weight saving. My 240 weighs 960kg ready to hit the track with the only fibreglass panels being the bonnet and front bar. The steel front gueards are lighter than any fibreglass guards available.
For a road car I would recommend staying with glass as the maintenance is a lot easier and it does take a lot more punishment, as well as can be polished if it is scratched.
Posted 21 February 2010 - 05:51 PM
Posted 21 February 2010 - 06:01 PM
Maybe to protect them you could have one of those sheets like you stick to your phone screen to stop it getting scratched... but a really big one
Just like the tear off windscreens they use in NASCAR!!!!
Posted 22 February 2010 - 11:25 AM
Posted 23 February 2010 - 09:00 AM
Posted 14 May 2010 - 02:20 PM
What is the difference between perspex and polycarbonate? Which is better?
I presume having these would make the car unroadworthy?
Posted 15 May 2010 - 02:21 PM
Posted 15 May 2010 - 10:50 PM
they take an factory piece of glass, lay acrylic over it and then place the whole thing in the oven to uniformly heat it. The heat allows the acrylic to take on the form of the glass, the edges trimmed and voilla! you have a new light rear screen.
I'll be doing this with my car. The idea for me is cost, weight and sliding side windows!!
By shaping the side acrylic windows I should be able to cut it to shape, drill holes in it, and have plastic, sliding side windows. Nobody I know with Lexan has this.
Acrylic does go cloudy but all it takes it a bit of a polish and it comes good again. Use a machine to polish it if you have one or can get one and you will never have a problem. Much like headlights on modern cars that go yellow, you can polish it right out. If it goes cloudy in a few years and you can't polish it, just get it redone, it's not expensive!
Posted 16 May 2010 - 09:37 AM
Use Philips bulbs and you wont have that problem, they are all UV cut quartz glass.
You can also get specific plastic polishes that have a UV shield in them to prevent yellowing.
Philips do a good one, as does Permatex.
Use Vuplex or Plexus for cleaning it.
Its specially formulated for cleaning clear plastics, like motorbike visors ect ect. It works really well.
Posted 08 April 2011 - 02:05 PM
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