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Old 04-16-2017, 08:56 AM
albertaflyer albertaflyer is offline
Join Date: Oct 2010
Location: Red Deer, Alberta
Posts: 67
Default SDS EFII Install

I have a short line (5") from pressure regulator to bulkhead fitting. Just wondering best procedure to connect line? Flex line, hard line straight in (little bit of offset not much), or a loop with hard line? Expansion/contraction an issue on such a short line? I've seen others do it but I want it done right. Not sure on what's an acceptable practice with aircraft fuel line. Btw it's a 3/8" line.
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Old 04-16-2017, 10:58 AM
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Toobuilder Toobuilder is offline
Join Date: Jul 2009
Location: Mojave
Posts: 3,423

Can you post a picture? Line use will depend an awful lot on the amount of potential relative movement between the two connection points.
WARNING! Incorrect design and/or fabrication of aircraft and/or components may result in injury or death. Information presented in this post is based on my own experience - Reader has sole responsibility for determining accuracy or suitability for use.

Michael Robinson
Harmon Rocket II -SDS EFI instalation in work
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Old 04-17-2017, 08:08 PM
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stringfellow stringfellow is offline
Join Date: Mar 2015
Location: Portland, OR
Posts: 49

Here's the example from the Fly EFII installation manual. Looks pretty clean to me.

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Old 04-18-2017, 12:31 PM
tailcreek_flyer tailcreek_flyer is offline
Join Date: Oct 2008
Location: Stettler Alberta
Posts: 58

Hi Tony,
I used fuel injection rated rubber hose from my rail pressure regulator to a bulkhead fitting on the fire wall. I then put a fire proof sleeve on the hose. I have about half a loop of slack between the engine and fire wall. This line doesn't run at injection pressure and it just loops back to the head tank in my case. No issues thus far. I'd stay away from hard piping it in.
This is on an SDS system on my CH701. My RV9A uses the Eagle EFI.
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Old 04-18-2017, 01:57 PM
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bret bret is offline
Join Date: Feb 2010
Location: Gardnerville Nv.
Posts: 2,408

My fuel lines are the carbon impregnated PTFE SS and coated type with fire sleeve protection installed, filters, pumps and regulator are on the engine side of the firewall. all components have heat shielding and the two firewall bulkhead fittings are steel. Vacuum lines to pressure regulator and MAPs are also fire sleeved.
7A Slider, EFII Angle 360, CS, SJ.
2017 gladly supported
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Old 04-20-2017, 09:08 PM
albertaflyer albertaflyer is offline
Join Date: Oct 2010
Location: Red Deer, Alberta
Posts: 67

Thanks for the responses! I think I'm going to use a stainless teflon lined hose. Just don't like the idea of having an almost straight solid line connecting two things that can move individually... maybe not much but they can. What are others using for filters. Seems to be different ideas as to what is acceptable and what is overkill. Thanks again! I can't post pictures as I have no acct. to post pictures to.
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