In cabin cooling system tank firewall?

[biglady112]

I will be running a hatchback car with no trunk. I will be adding 8-10 gallons worth of cooling capacity for the engine. I need to order an up to date rule book but, the one I have here does not state that an in cabin coolant/water tank needs to be sealed from the driver compartment.

The plan for the tank is to mount it to the rear of the car 4-5ft behind the driver seat. With the rules being that straight water is to be ran, is a firewall/containment for the rear of the car mandatory?

[deepindebt]

 We have a similar set up in our roadster,tank is next to me,only thing that ever came up(2019 SW)was to move vent to outside of drivers area.

[biglady112]

That was already in the plans. Thank you. Makes it a little easier to package this.

[jimmy six]

About 25 years ago a well known competitor in a roadster had a flat tank over his legs. It cracked and his legs were scaled by hot water. I would want some kind shield between me and any hot liquids.
My roadster has very limited room and a 9 gallon tank behind me. I have gone to great pains to seal it off or at least deflect it around me. In any coupe, even the hatchback style, I would construct a box around your tank hindging it in front so I could unlatch at the rear and tip to fill.
There is no way Id be sitting next to hot water in a crash/rollover without the minimal protection rule or no rule....
Many hatchbacks have there rear window replaced with sheet aluminum and seal up to it like a firewall from the floorboard. 

[Beef Stew]

About 25 years ago a well known competitor in a roadster had a flat tank over his legs. It cracked and his legs were scaled by hot water. I would want some kind shield between me and any hot liquids.
My roadster has very limited room and a 9 gallon tank behind me. I have gone to great pains to seal it off or at least deflect it around me. In any coupe, even the hatchback style, I would construct a box around your tank hindging it in front so I could unlatch at the rear and tip to fill.
There is no way Id be sitting next to hot water in a crash/rollover without the minimal protection rule or no rule....
Many hatchbacks have there rear window replaced with sheet aluminum and seal up to it like a firewall from the floorboard.

Self preservation should always be a primary consideration. Jimmy Six doesn't need a rulebook to tell him that, and neither do I.

[biglady112]

I understand the risk. Thus , why this was asked. I was burned very badly in a fire four years ago. So much so 40% of me was burned.

I will likely build a small containment. Not a true blue rear firewall but, what I am comfortable being safe with given the constraints of the build. I just needed to see if I was misinterpreting something and if it needed to be a serious, fully sealed firewall.