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Old 08-01-2009, 07:44 PM   #1
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Default Fuel pressure lines

Hi, The topic was ment to be exhust presure lines, not fuel.
Does anyone know what the effects of having a longer of shorter exhust presure line has on the motors?
I know a shorter line will give you more presure inside the tank.
I am going to try and make an aluminium exhaust presure line to replace the normal fuel tubing in an attempt to get the exhaust gases inside the tank cooler.

Just not sure if you are better of with longer of shorter lines. ( More presure or less presure inside the tank)

If anyone knows anything about this it would be appreciated.
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Old 08-01-2009, 08:20 PM   #2
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Making a pressure line that's too short might lead to fuel sloshing back into the pressure line after you've filled the tank and cause your engine to run erratically; that's why you see the pros run at least 8 inches of pressure line.

The other thing that you might want to look into is that the more common use of silicone tubing seems to me to be a good thing, since unlike metal, silicone is a poor heat conductor, and will prevent the heat from the exhaust being transmitted up the line and to your fuel. There are some drivers now running aluminium heat sinks on the line to cool the exhaust flow, but I think that the heat sink's fins, added to the fact that it's sandwiched between two lengths of silicone tubing are what help in keeping the fuel cooler.
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