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Location:
Rocklea qld
Registered:
February 2003
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18rc with no return line on fuel...whats the economy gonna be like
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Sat, 24 April 2004 08:35
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Ive just hooked up a electric fuel pump to my 18rc and have not hooked up the retun line....what sort of fuel economy will i get...Should i get another mechanical pump so a return can be used or will i be alright without using it...
NOTE i only hooked up the elec fuel pump as the machanical one started leaking and i had to go out urgently
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Location:
Brisbane
Registered:
February 2003
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Re: 18rc with no return line on fuel...whats the economy gonna be like
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Sat, 24 April 2004 08:58
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the carbi will leak fuel at idle or cruise - unless the pump has some kind of over-pressure protection (e.g. when line pressure hits Xpsi, don;t pump so hard or keep 1-way valve open) - and this is unlikely.
fuel economy might be very ordinary - possibly frightening if the floats/needle-valve in the carbi can't hold back the higher pressure.
i'd remove a pump from one of your spare engines rather than use an electric pumpe with no return. otherwise you really need a carbi that has provision for a return line.
charles.
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: 18rc with no return line on fuel...whats the economy gonna be like
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Sat, 24 April 2004 09:19
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it totally depends on the electric pump, and what pressure the carby wants.. my pump is internally regulated to (or can only produce)3psi, which is perfect for my weber, so i don't need a return line.
if your pump is not regulated, and produces too high a pressure, then you may have probs.
Cya, Stewart
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Location:
Rocklea qld
Registered:
February 2003
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Re: 18rc with no return line on fuel...whats the economy gonna be like
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Sat, 24 April 2004 09:44
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all my other engine either have no pumps or they are broken...I mi9ght just grab one tomorrow from the wreckers.
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Location:
brisbane
Registered:
March 2003
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Re: 18rc with no return line on fuel...whats the economy gonna be like
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Tue, 27 April 2004 08:25
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is it a high pressure efi pump? or a low pressure one?
if it is a high pressure one you will need to get a carbi fuel pressure regulator onto it you mount it before the carb
if it is a low pressure pump then it will be fine
i have got a high pressure pump with a fuell reg on it.. works fine with my carbies... i know a few other ppl that has done the same thing and no problems
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