Whats the rule on a front mounted 2-3 gallon fuel cell mounted under the hood? Looking to put it where the battery used to go.

Same as any other fuel cell rule. No more than 12" of rubber fuel line. Hard line or steel braided hose only.

If located outside body and/or frame, it must be enclosed in a steel tube frame constructed of minimum 1-5/8" x .118 tubing.

Although in the battery box area is technically outside the frame, it's up to your local tech inspector if it's acceptable without a frame around the outside.

Mine is mounted in front of the radiator support, and while my tech guy never said anything, I did make up a bar that goes qround the front and attaches to the front with plates that bolt up where the front crash bar was located.

Since I need to get a chassis certification next year, I'm planning on doing something similar.

Is that total or in one section? I have a car that came from the factory with rubber fuel lines going to each injector, 6 injectors x 3" per = 18" of rubber line. Local track probably wouldn't even look twice at it though.

But those are not rubber hoses. They are pressure lines so they're already reinforced. I have 8 similar rubber lines going from my barrel valve to each injector for about 8-10 feet of hose.

The rule book says 12" total. This accounts for all the small sections of rubber hoses joining a fuel pump, filter, carb etc to hard lines.

It was/is very common from someone with a chev engine to replace the hard line from the pump on the side of the block all the way up to the Holley carb they just installed with a chunk of plain rubber hose. This isn't acceptable.

Steel braid hose is an option but there are other types of pressure hose that's also acceptable. Woven pushlock hose is a pressure rated hose that's also acceptable and isn't steel braided.

So it basically has to be pressure rated?(70-80ish psi)

I'd bet that my local track won't open the hood, but it's good to know if they ever start enforcing the rules.

Buy a rulebook

got any pics of that?

the rules state that individual injector lines are excluded