NHRA or IHRA rules
05-11-2005, 09:07 PM
#1
3.0 BAR
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Join Date: Apr 2003
Posts: 2,579
NHRA or IHRA rules
Does any on eknow exactly what the NHRA or IHRA rules are regarding fuel cells, as in mounting, thickness of mounting straps, thickness of rear fire wall.
Better yet does anyone have a copy or link to the full NHRA or IHRA rules the only thing I can find on their site is trying to sell me a copy and ---- That.
Better yet does anyone have a copy or link to the full NHRA or IHRA rules the only thing I can find on their site is trying to sell me a copy and ---- That.
05-11-2005, 09:32 PM
#2
0.5 BAR
Join Date: Sep 2004
Posts: 100
Re: NHRA or IHRA rules
here is NHRAs
First off, the NHRA requires cars with fuel cells must have a firewall made of 0.024-inch steel or 0.032-inch aluminum between the driver’s compartment and the fuel cell. In a car with a trunk, this means the firewall must cover the bulkhead behind the rear seat as well as the package tray area.
On hatchback models, the firewall must enclose the rear part of the cargo area. The other big rule about fuel cells is that they’re supposed to be mounted to the frame, even on unibody cars like our Mustang. According to the tech advisor we spoke with at the NHRA, anything that’s attached to something that’s attached to the frame is considered “attached to the frame.” Get that? In our case, that means it is legal for us to bolt the fuel cell to the trunk floor using the steel mounting straps that came with the fuel cell, as long as we run another set of straps under the trunk floor and bolt or weld them to the frame rails. Here are some other important, but often overlooked, NHRA rules regarding fuel systems:
• No more than 12 inches of rubber (nonbraided) hose is permitted in the fuel system connections.
• Any hose running past the flywheel/bellhousing, except braided steel lines, must be enclosed in at least 0.118-inch-wall steel tubing.
• No fuel hoses may run inside the driveshaft tunnel or inside the framerails.
• Fuel pressure gauges mounted inside the passenger compartment must be isolated from the fuel supply with a fuel gauge isolator.
First off, the NHRA requires cars with fuel cells must have a firewall made of 0.024-inch steel or 0.032-inch aluminum between the driver’s compartment and the fuel cell. In a car with a trunk, this means the firewall must cover the bulkhead behind the rear seat as well as the package tray area.
On hatchback models, the firewall must enclose the rear part of the cargo area. The other big rule about fuel cells is that they’re supposed to be mounted to the frame, even on unibody cars like our Mustang. According to the tech advisor we spoke with at the NHRA, anything that’s attached to something that’s attached to the frame is considered “attached to the frame.” Get that? In our case, that means it is legal for us to bolt the fuel cell to the trunk floor using the steel mounting straps that came with the fuel cell, as long as we run another set of straps under the trunk floor and bolt or weld them to the frame rails. Here are some other important, but often overlooked, NHRA rules regarding fuel systems:
• No more than 12 inches of rubber (nonbraided) hose is permitted in the fuel system connections.
• Any hose running past the flywheel/bellhousing, except braided steel lines, must be enclosed in at least 0.118-inch-wall steel tubing.
• No fuel hoses may run inside the driveshaft tunnel or inside the framerails.
• Fuel pressure gauges mounted inside the passenger compartment must be isolated from the fuel supply with a fuel gauge isolator.
05-11-2005, 11:58 PM
#5
3.0 BAR
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Join Date: Apr 2003
Posts: 2,579
Re: NHRA or IHRA rules
Thanks for the help. I'm not planing on running any class but one of the tracks by my house, RT66 IL, is rediculously strict, and you have to pass NHRA tech just to run at test and tune. The next closest track, US41 IN is the opposite. you can run anything, they area bunch of hillbilies, thats why I like that place mroe. I go there most of the time but RT66 is closer so I'd like to be legal, plus the car should be in the 10s eventually so I wan tit to be safe.
This is for my camaro <-- btw
This is for my camaro <-- btw
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