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Old 06-08-2006, 07:17 PM   #1
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Default Fuel Lines... Short-Long What's the difference?

Just looking at various pictures on the web. Some people have long fuel lines some have short. Does it make a difference what you have? I think I remember reading in RCCA like 3-4 years ago about this but it's has been very long can someone please re inform me? Thnx
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Old 06-08-2006, 07:39 PM   #2
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I think if the fuel lines going to the motor are too short than the fuel will I guess evaporate from all the heat comming off the motor before the fuel gets to your carb.
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Old 06-08-2006, 07:40 PM   #3
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Longer is always better!

Seriously, it's a way to sneak in some additional fuel capacity and to allow the engine to stay running longer when the car is on its lid.
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Old 06-08-2006, 07:42 PM   #4
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Quote:
Originally Posted by slowandsteady
I think if the fuel lines going to the motor are too short than the fuel will I guess evaporate from all the heat comming off the motor before the fuel gets to your carb.
It has nothing to do with this. I even run a wrap of tubing around the cylinder head with no heat problem.
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Old 06-08-2006, 07:51 PM   #5
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You cut your fuel tank pressure line to a length that
keeps steady pressure in the tank, you dont want pulses of air
going to the tank causing changes in fuel tank pressure.
6-8 inches is common

The actual fuel line length depends on if you want to follow
any rules or not. ROAR rules say there is a maximum fuel
capacity in the fuel system set to each class. Now i race at
a track that "follows" ROAR rules yet I see guys with 2 fuel
filters and 4 and 1/2 feet of fuel line rapped around the inside
of the car 13 times, putting them a.......... oh i dont know maybe
twice the legal fuel capacity.

your choice

Derrek
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Old 06-08-2006, 07:52 PM   #6
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I really didnt understand the reason when I was told about it either thats why I said I think.
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Old 06-08-2006, 08:47 PM   #7
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Arecree + Drock got it...it's just an overal fuel capacity thing + when upside the volume of fuel in the fuel line is all that keeps then engine running until it's flipped over and the line is re-primed.
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Old 06-08-2006, 10:40 PM   #8
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Longer is better.

When you flip over all the fuel goes to the top of your tank (because your upside down) literally starving your engine of fuel. With longer fuel lines there is more fuel in your line (because you have more line) and that fuel should keep your engine running until a marshall flips you back over.

AND

It is better since you will have more fuel to run on in a race (not alot but some). Since there is fuel in your line when you come in to fill up before the race your fuel tank will be full and there will be more fuel in your line, giving you a little more fuel to run in the race.
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Old 06-16-2006, 03:42 PM   #9
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Quote:
Originally Posted by slowandsteady
I think if the fuel lines going to the motor are too short than the fuel will I guess evaporate from all the heat comming off the motor before the fuel gets to your carb.
thats the funniest thing Ive ever read!!!!!
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Old 06-16-2006, 04:17 PM   #10
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I bet that if you ran a second gas tank setup so that it would take in fuel properly when the car is upside down it would fix that problem and you wouldn't have to use much fuel tubing.


On a real note. Run a very short piece from the pipe to the tank. A piece about 2-3 feet from the tank. This will make the car responsive and it will also allow the car to run properly when it is flipped upside down. Make sure the tubing from the pipe to the tank is long enough that it will stay in place when the pipe bounces around from vibrations and landing jumps and ect. A whole lot of force is put on it and it does move around some.
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