Rules on rubber fuel line, how long?

[78spyder]

I have about 9" total rubber fuel line where the hard line ties to the fuel pump, then to the carb. I was probly going to use anoither 6" or so where the main fuel feed hooks up to the mechanical fuel pump on the motor to absorb the flex of the motor. IHRA rules, and probly NHRA too say rubber fuel line is limeted to 12" maximum lenghs for connective purposes only. I think they mean plural form with the "lenghs" not total, as most cars have more then 12" total, even new cars. Am I ok with the 9 + 6?

[bill1978v8]

I believe it is 12" or less total. If you plan on racing they will inspect the fuel lines. Good luck.

Bill

[Monzsta]

Your best bet is running AN line. They won't question that.

[danfigg]

Buy 25 foot of aluminum 3/8 fuel line, a tube bender, and a flange tool. You will love it. Get all the AN fittings for 3/8 fuel line and all of the sleeve and nuts and call it a day. Have fun----------danfigg

[bill1978v8]

Make sure to use a little bit of rubber line with the aluminum line as the engine will cause stress cracking in the aluminum over time. I used socketless hose and AN fittings for the Fuel injection. Stop over sometime Curtis and I'll show you how I ran the Fuel system.

Bill

[BigTruckDriver]

I think its 12" total.Meaning if you have 2" pc at the carb and 4" pc at the fuel pump and 6" at the tank thats all thats allowed.

[78spyder]

K. If I use a steel carb fuel line, I'll be ok. Thats surprising, as most new cars have under hood 8" fuel line, 8" return line then another 6+6 on the tank end for a total of 28"!!! I know not all these guys are running around with AN line on their Cavalier at the track, so maybe the tech inspectors let a bit slide. This is for a friends car, not my Monza, btw. I'll end up with about 9" on the other car, plus whatevers on the tank for now, it will be upgraded to all aluminum line after the motor is broke in.

[danfigg]

Best thing you can do is make sure every thing under the hood looks good. Tuck every thing under the car. Make sure the rubber line you use is high pressure high heat fuel line and there shouldnt be a problem. If shit looks ghetto under the hood then that will raise a red flag. If things look proper undr the hood then they will think all is good. I actually like the fact that the tech guys are pricks. It made me fix alot of stuff that was wrong with my car. Besides do you want to be responsible for wrecking or killing someone else because of something you could have prevented-------danfigg

[bill1978v8]

Good points dan!

Bill

[Fasterthansome]

The IHRA book says Rubber hose is limited to 12'' "lengths" maximum for connection purposes only.

[spyder_xlch]

The IHRA book says Rubber hose is limited to 12'' "lengths" maximum for connection purposes only.

I take that as 12" per connection. Does it say how many connections there can be?

[Fasterthansome]

It says nothing about how many connections.

[chevyart]

i believe fasterthansome is correct. one connection in front and one in rear is the absolute most you should need. take a look at some of the new flexible lines that summit and jegs sells. its not that metal coated russel line and its not the plain old rubber type good luck chevy artPS they hace the real easy to install slip on fittings with the new type lines

[smallblock77]

Lines: All non-OEM fuel lines (including gauge and/or data recorder lines) must be metallic, steel-braided or FIA accepted "woven pushlock". A maximum of 12-inches (30.5 cm) total (front to rear) of non-metallic or non-steel braided is permitted for connection purposes only; individual injector nozzle and motorcycle fuel lines are excluded. Fuel lines (except steel braided lines) in flywheel/bellhousing area must be enclosed in a 16-inch (40.6 cm) length of steel tubing, 1/8-inch (3.2 mm) minimum wall thickness, securely mounted as a protection against fuel line rupture. It is mandatory that fuel lines passing supercharger drive belts be steel braided or be enclosed in protective steel tubing. Fuel lines must not be routed in the driveshaft tunnel.