Lexan windshield

Those rules just state that a windshield is mandatory. May be replaced with shatterproof material, i.e. Lexan, Plexiglas, etc.
If you use acrylic sheet (plex), look for an IMPACT MODIFIED type...will reduce cracking. Don't be afraid of off-brand polycarbonate sheet (Lexan is just G.E.'s brand name). If it's polycarbonate, it's polycarbonate...many brands come to mind, GE, Spartech, Plaskolite, Bayer, Sheffield, on and on. I use a ton of that stuff in my work and one is pretty much like the others. The only difference may be in U.V. coatings or scratch resistant finishes. Electric sign manufacturers are a good place to look for the stuff. Many stock it on big reels to be cut as necessary.

Yes lexan is legal but plexglass is not here at the local tracks

Standard plexiglass is not typically shatter proof from what I have been told.

Bought a sheet of mar resistant Lexan. It was about $400 for a 4x8

lghting94 wrote:Standard plexiglass is not typically shatter proof from what I have been told.

Yes plexiglads wll shatter some a.d leave sharp edges not good if you get in a wreck we did some testing when i was at pace american with both.Hit plexiglass with a bfh and it will brake hit lexan with a bfh and watch out you might get hit with the bhf in the forehead.

lghting94 wrote:Standard plexiglass is not typically shatter proof from what I have been told.

That's why I mentioned the "impact modified" stuff...It's tougher than the standard crap.

HorsinAround wrote:...........So does this mean a lexan windshield is legal? My buddy says it must be speed glass or oem glass.

As far as the NHRA "general regs" go, Lexan/Margard (and/or similar) is a legal alternative to OEM glass. Now that's not to say that it's always legal in every drag class/circuit out there, some individual class out there might still require OEM glass.

The 1/8" minimum thickness might be in the general regs/rules, but is hardly ever enforced at the sportsman level. Going thinner is OK IMO on the side/rear glass if you're sure you won't ever be checked. And even some faster "weight watcher" outlaw classes like Outlaw Pro Mod (and similar classes) are going thinner than 1/8" on the sides & rear looking for every advantage they can get.

In my opinion Plexiglass should never be used.

I like the margard also for the windshield. Won't scratch or swirl and really tuff.