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Old 08-13-2007, 03:01 PM   #1
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Default Run with or without a fuel filter?

I am asking about running off road with or without a fuel filter. I ask this because I'm running my Truggy with one. I noticed with added fuel line,plus a large filter the fuel suction from the motor decreased. The engine then leaned itself under full power. I am running 8 inches from the pressure tap off of the exhaust. My fuel line is clear and I can see air gaps in the fuel when going from the line to the filter. I do know that most fuel tanks have some sort of particle filter in them. I also know that many people use fuel filters for extra fuel capacity.
I am originally an on road driver and I don't run one on my 1/10 or 1/8 scales.

1. Would anybody take the chance to run off road without a fuel filter?
2. Do you think that large fuel filters reduce fuel flow at the cost of more capacity?
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Old 08-13-2007, 03:38 PM   #2
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Every fuel tank made, that I know of, has a built in fuel filter. Having another one in does help though. I generally run a bigger one if I can put one in. I wouldn't worry about the flow though. There's still more than enough.
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Old 08-13-2007, 03:52 PM   #3
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I've run 8th buggy and truggy with and without external filters and had about the same luck with either, aside from the filter body occasionally trying to unscrew itself. I used them gutted for the extra fuel capacity, but I was never as comfortable running them as I was leaving them out. My personal preference is without. A longer pressure line should help with the leaning out if it's happening after you drop below half a tank.
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Old 08-13-2007, 07:18 PM   #4
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ive seen somewhere that the pressure hose should be around 12 inches long, and the longer it is the more tank pressure you will have....
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Old 08-14-2007, 08:29 AM   #5
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A longer pressure line will not actually increase tank pressure so much as it will reduce the tendency for it to pulse at low RPM which keeps the pressure consistent. If you must use a short pressure line, use the smallest diameter you can get away with.
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Old 08-14-2007, 08:50 AM   #6
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im a believer in YES fuel filter. use teflon tape to put them together and keep them together if they tend to try to unscrew themselfs. you can also zipstrip the filter to the fuel tubing or another stationary item and it will help cuve the self unscrewing part.
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