Rear Firewall Question

413 said
EVERY hole needs covered, defroster holes, all the small holes that are in seemingly random places. That’s why they want a full sheet.

And the rear seat area needs covered or it can catch fire and let fire inside the car.

I don’t think your patches will be accepted.

Read the rule book as to the fire resistant caulk.

Of course this depends on your tracks tech people. Some tracks don’t do much, but it’s for your safety.

I don't have a rear seat and plan on using a full sheet of .040 aluminum for the main rear bulkhead/seat back area (riveted around the perimeter and to the seat bracing), then I'll cover it with a sheet of carpeted fiberboard. Though, I may just spray it with some truck bed coating or something similar

The only holes in my package tray are the 3 speaker holes and the elongated rear defroster slot. I'll also be covering the areas of the C-pillar that are open to the trunk area.

Here are some excerpts from the NHRA rulebook (below). I don't see anything that specifically prohibits covering individual holes vs using a full sheet. Now that I think of it, I'm not sure what the difference would be from someone screwing on a cover for a deleted heater blow motor or something similar on the front firewall. I will double check with our tech guy though. Luckily he's very responsive to these types of rule questions via email. Thanks guys.