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wowens(at)darientel.net
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 Posted: Fri Dec 08, 2006 5:23 am Post subject: fuel return lines |
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How are folks running fuel return lines for fuel injected engines?
Should they go all the way to the fuel tank? do you need a more complex valve that also selects which tank the returned fuel go to.
Thanks for the wisdom.
Wayne
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Albert Gardner
Joined: 10 Jan 2006
Posts: 455
Location: Yuma, AZ
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| Posted: Fri Dec 08, 2006 8:42 am Post subject: fuel return lines |
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Wayne: you can either return fuel to the tank or - in the RV-10 IO-540 engine - we install a T-fitting just after the fuel selector and return fuel there. If you want to return fuel to the tank, some aircraft always return fuel to a specific tank but others use a fuel selector valve that selects a fuel return path at the same time you select a fuel source.
Albert Gardner
Yuma, AZ
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RV-9A N872RV
RV-10 N991RV |
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revenson(at)comcast.net
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| Posted: Fri Dec 08, 2006 9:49 am Post subject: fuel return lines |
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trigo(at)mail.telepac.pt
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| Posted: Fri Dec 08, 2006 10:50 am Post subject: fuel return lines |
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Wayne
I have a -9A with a Subaru fuel injected engine.
We make the return lines all the way back to each fuel tank, and we use a special 3 way - 2 level fuel valve from Andair. They call it Duplex fuel selector and I used model FS 25- 20.
You can see what is our factory recommended fuel installation here.
If your engine is not a car conversion, you can use the same system, except for the firewall forward part.
Carlos
RV-9A with Egg-Subaru H-6
Portugal
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dfischer(at)iserv.net
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| Posted: Sun Dec 10, 2006 1:21 pm Post subject: fuel return lines |
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If you're going with a Silverhawk system (Precision/Bendix), I've heard that a return line is not needed. The Airflow Performance system requires a return line, however.
Doug Fischer
RV-9A Wings
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