72 914 track car windshield replacement, glass or polycarbonate Options

[RiceNeck]

This car will not be driven on the street, it will be used on the race track.
During roll cage install my windshield was damaged, so any suggestions from the 914world community would be helplful.
Should I replace with oem type glass or polycarbonate.
If you have installed a polycarbonate windshied in your car what has been your experience? Would you do it again? How about UV and scratches?
What manufacturer or company did you purchase your windshield from?

[RiceNeck]

O.K. a polycarbonate windshield is allowed as long as
"Minimum weight post race with driver will be 2050lbs. Any car not making minimum weight is subject to being disqualified by the race committee."
After all the input, I have decided to go with a polycarbonate type race winshield.
Racer Chris, now post up those pictures, so I can see how its DONE!

[ChrisFoley]

O.K. a polycarbonate windshield is allowed as long as
"Minimum weight post race with driver will be 2050lbs. Any car not making minimum weight is subject to being disqualified by the race committee."
After all the input, I have decided to go with a polycarbonate type race winshield.
Racer Chris, now post up those pictures, so I can see how its DONE!

I followed SCCA rules for my Lexan windshield installation.
They require clips to secure the windshield from the outside and strips inside to prevent it from collapsing.
They also require 6mm or thicker material, preshaped to fit the vehicle.
I found that the Lexan didn't really have the same curvature as a glass windshield so I added 3 screws at each end to hold it down.

The clips are made from 1" wide x 1/8" thick 6063 aluminum.
The inside strips are 3/4" x 1/8".
A total of 7 clips (3 top, 4 bottom) hold the windshield down, with three 1/8" aluminum rivets each.
I skewed the safety strips toward the passenger side to improve my field of vision, while still exceeding the minimum spacing stated in the rules.

I used dense foam self adhesive weatherstripping all around the frame, with a thickness which sets the windshield flush with the exterior.
The aluminum strips are covered with black tape to make them less obvious.
The clips have foam tape on the side facing the windshield to prevent chafing.

The screws are 1/4"-20 buttonhead, with thin nylock nuts, only because I had a ton of them laying around.
The screw holes in the lexan are oversized so no stress cracks will be created from the windshield expanding and contracting.
I remember that it was a real challenge to tighten the nuts because of the rollcage.
They're only tightened enough to hold the windshield against the weatherstripping, not to clamp it tightly.

The black banner is limo tint applied to the inside of the windshield before installation.
The vinyl lettering is applied on the outside.
The "smudge" above the letter T is a Shields logo branded into the polycarbonate.

It took a lot of time to complete the installation, but its held up for many, many races, and I'm real happy with the result.
The Lexan is still in very good condition.
The Shields pre-cut to size windshield was a very good fit and a lot easier than starting with an oversize piece and trimming it.