Quote:

NHRA rulebook for 7.50 or slower says .024 inch steel or .032 aluminum. Bulkhead must isolate driver compartment from trunk. Doesn't say how to mount it.

Fireproof caulking



First, this is ONLY required if the battery or fuel cell has been relocated to the trunk. And, as mentioned the posts above, if only the battery is in the trunk, a sealed battery box can be used in place of a firewall.

Mounting of the rear firewall is open to the car owner, as long as it is not with zip ties or hose clamps!

Screws or welding is preferred.

There NO requirement for fireproof caulking, but any gaps around items passing through (i.e. roll bar) should be minimal. Metal patches can be used to cover holes (NOT duct tape!).

I would agree that the fireproof caulk is a good added measure, but it not required. Might be good for an extra pat-on-the-back from the tech guy!

Scott
NHRA D-3 "silver" tech