fuel tubing size and routing
09-16-2008, 02:50 PM
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fuel tubing size and routing
im new to gas.
1. so i have a crrc 26 gas engine coming and i need to know what size fuel tubing to get. and tygon is the proper tubing? ive seen 5/32 1/8 and 3/32 sizes
2. Also, How is the fuel tubing routed? I know how the glow fuel routing works. For gas, from tank clunk to carb seems right. Is there a return to the tank?? Or is there just an open fuel line to let air into the tank as fuel is taken from tank??
thanks
1. so i have a crrc 26 gas engine coming and i need to know what size fuel tubing to get. and tygon is the proper tubing? ive seen 5/32 1/8 and 3/32 sizes
2. Also, How is the fuel tubing routed? I know how the glow fuel routing works. For gas, from tank clunk to carb seems right. Is there a return to the tank?? Or is there just an open fuel line to let air into the tank as fuel is taken from tank??
thanks
09-16-2008, 03:52 PM
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RE: fuel tubing size and routing
Downwind,
I use 1/8 inch tygon for everything 100cc and smaller. (I don't own anything bigger.) Gas motors are not senitive to fuel volume like a Large glow motors would be. In the meantime I still preferr the 3 line setup for all of my gas fuel tank setups... One dedicated to the vent, one for the fill and one to the carb. I don't like to have anymore junctions than needed between the clunk and the carb.. (Just my Opinion.) OH and I solder fuel bards on all brass tubing and then zip tie the tygon fuelline.. I haven't had a fuel delivery related problem yet... (again just my opinion.)
Good Luck,
I use 1/8 inch tygon for everything 100cc and smaller. (I don't own anything bigger.) Gas motors are not senitive to fuel volume like a Large glow motors would be. In the meantime I still preferr the 3 line setup for all of my gas fuel tank setups... One dedicated to the vent, one for the fill and one to the carb. I don't like to have anymore junctions than needed between the clunk and the carb.. (Just my Opinion.) OH and I solder fuel bards on all brass tubing and then zip tie the tygon fuelline.. I haven't had a fuel delivery related problem yet... (again just my opinion.)
Good Luck,
09-16-2008, 05:23 PM
#3
RE: fuel tubing size and routing
ORIGINAL: downwind
im new to gas.
1. so i have a crrc 26 gas engine coming and i need to know what size fuel tubing to get. and tygon is the proper tubing? ive seen 5/32 1/8 and 3/32 sizes
2. Also, How is the fuel tubing routed? I know how the glow fuel routing works. For gas, from tank clunk to carb seems right. Is there a return to the tank?? Or is there just an open fuel line to let air into the tank as fuel is taken from tank??
thanks
im new to gas.
1. so i have a crrc 26 gas engine coming and i need to know what size fuel tubing to get. and tygon is the proper tubing? ive seen 5/32 1/8 and 3/32 sizes
2. Also, How is the fuel tubing routed? I know how the glow fuel routing works. For gas, from tank clunk to carb seems right. Is there a return to the tank?? Or is there just an open fuel line to let air into the tank as fuel is taken from tank??
thanks
This pic is a 3-line setup as described by the previous post. I also like to have a direct line from clunk to carb.
09-16-2008, 05:26 PM
#4
RE: fuel tubing size and routing
The vent line is taken over the top of the tank to prevent syphoning out in aerobatics, but left open the fill line should be plugged after filling, us a bronze or felt clunk to prevent bubbles, don't forgett to barb the clunk line inside the tank also. Barbs can be made out of paper clip wire and soldered onto the brass tubing.
Mike
EDIT: take the vent line out of the bottom of the fus.
Mike
EDIT: take the vent line out of the bottom of the fus.
09-16-2008, 06:30 PM
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RE: fuel tubing size and routing
ORIGINAL: Hibrass
Downwind,
I use 1/8 inch tygon for everything 100cc and smaller. (I don't own anything bigger.) Gas motors are not senitive to fuel volume like a Large glow motors would be. In the meantime I still preferr the 3 line setup for all of my gas fuel tank setups... One dedicated to the vent, one for the fill and one to the carb. I don't like to have anymore junctions than needed between the clunk and the carb.. (Just my Opinion.) OH and I solder fuel bards on all brass tubing and then zip tie the tygon fuelline.. I haven't had a fuel delivery related problem yet... (again just my opinion.)
Good Luck,
Downwind,
I use 1/8 inch tygon for everything 100cc and smaller. (I don't own anything bigger.) Gas motors are not senitive to fuel volume like a Large glow motors would be. In the meantime I still preferr the 3 line setup for all of my gas fuel tank setups... One dedicated to the vent, one for the fill and one to the carb. I don't like to have anymore junctions than needed between the clunk and the carb.. (Just my Opinion.) OH and I solder fuel bards on all brass tubing and then zip tie the tygon fuelline.. I haven't had a fuel delivery related problem yet... (again just my opinion.)
Good Luck,
