Use of Plastic or Brass Fittings in Fuel Line? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 10-18-2007, 01:44 PM
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Use of Plastic or Brass Fittings in Fuel Line?

I want to put a tee in my rubber fuel hose that feeds the carburator so I can have a fuel pressure gauge in the engine compartment. Rubber fuel line is 3/8 inch and the the fuel pressure is 5-6 psi from mechanical fuel pump.

Is it okay to use a brass or plastic tee with barbed ends for this purpose?

John

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Old 10-18-2007, 01:54 PM
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Personally I do not like rubber hose on the pressure side of the pump. I look at as a fire waiting to happen. Having said that, plastic has no place in the pressure line from the pump, brass is OK if you must do it that way. I would hard line it all the way from the pump to carb inlet for safety.

Vince
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Old 10-22-2007, 05:47 AM
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Rubber fuel line has been used forever by all manufacturers. It is better to use steel line from the pump to the carb if you can, but again, rubber fuel line is in very common use with no problems. Care is needed though not to run it next to the exhaust etc. Plastic T's are unsafe for fuel, they're meant for vacuum hoses and such.
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Old 10-22-2007, 07:40 AM
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[QUOTE=ernkazern]Rubber fuel line has been used forever by all manufacturers. It is better to use steel line from the pump to the carb if you can, but again, rubber fuel line is in very common use with no problems. QUOTE]

Partially not true, Ford Motor company had problems with rubber fuel line in the mid to late seventies. They used a Baldwin type canister fuel filter on the pressure side of the pump connected to the carb with a 3" piece of 3/8" rubber fuel line. That rubber fuel line was the source of many under hood fires. That and the advent of high pressure pumps for fuel injection sounded the death knell for rubber fuel lines with Ford.

Vince
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Old 10-22-2007, 08:50 AM
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302 I could not agree more, a rubber fuel line is an accident looking for a place to happen. I agree that it is often used and I have seen it run from the carb back to the tank in some cases but it is also true there have been a lot of fires resulting from rubber fuel line. When I did the EFI conversion on my Mustang I used 5/16" brake line and a bender to route it from the pump to the flexible lines that ford used going to the fuel rail. This stuff is fairly easy to bend and adapters are available to convert the ends to about any type thread you would need to connect barbed ends, factory type connectors, etc and it gives piece of mind knowing the fuel line is safe.
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Old 10-22-2007, 09:11 AM
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Quote:
Originally Posted by JohnTN
I want to put a tee in my rubber fuel hose that feeds the carburator so I can have a fuel pressure gauge in the engine compartment.

John


Your photo journal show a good bit of rubber fuel line hose already installed.



Summit Racing has a fitting for $5.88 that would work.

I would suggest that you replumb the fuel line to hard line. I would reduce rubber line as much as possible. Most race sanctioning bodies limit the use of rubber hose to 6 inches total ... in the fuel line ... for safety reasons.

OR ... you could use braided hose with a port for the fuel gauge


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Old 10-22-2007, 12:31 PM
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In 30 + years of repairing cars I've seen only one car fire from rubber fuel line and that was because the dummy forgot to put a clamp on the end of a hose. Now I'm talking about properly installed and maintained rubber fuel line. I would never run a rubber fuel line front to back on a car. It's meant for short lengths. On most vehicles you'll have a short length of rubber line as a flex point between the steel line on the frame and the steel line on the engine. I don't especially like the plastic fuel line that Ford and others use now. It looks like it would be cut too easily in an accident.
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Old 10-22-2007, 01:20 PM
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Respectfully, do what you wish....but the safest way is no rubber at all.

Vince
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Old 11-02-2007, 10:57 AM
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I found a barbed brass T at ACE hardware and am using it. The rubber hose is rated for fuel injection but is on the output of a standard mechanical pump. There is also a glass fuel filter in the output line.

So there are 8 hose clamps between the output of the pump and input to the carb with very short sections of high pressure rubber hose. I can see there are a lot of opportunities for leaks.

I'll look into hard plumbing it.

Is the braided hose a lot easier to run that bending steel tubing?

John
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