quote:There is also some question as to whether a plexiglass window will be allowed on a firewall by any of the race sanctioning bodies. Maybe someone else who has gone through that can already chime in on that subject?
As someone said, it depends on the particular sanctioning body(s) and their Tech requirements. Read the CURRENT Rule Book for your desired tracks before making such mods. They are very clear about most things, but requirements do change from year to year & track to track. Tech specs are not debate-able.
When a Pantera showed up all the way from Sweden at Bonneville a few years ago, the car's plastic rear window was rejected. They had to go to Wendover, NV and buy galvanized sheet metal to replace the plastic rear window, before Tech Inspection would approve their run. Seems Tech regards the rear window as part of the rear firewall, in spite of the fact that a stock glass rear window is about the first thing to break in an engine fire.
Regardless, plastic or fiberglas does not qualify as a firewall at Bonneville and it's not even wheel to wheel competition.