347 Blueprint EFI Fuel Supply Questions

[PMD24]

My engine (EFI) is due from Blueprint at the end of the month and I'm getting ready to run the fuel lines. Blueprint includes a fuel prefilter, remote pump, after-filter, and regulator. They haven't been able to tell me the micron rating of either filter but I'm assuming the pre is 100 micron, and the final is 10 micron. I've installed the PRO-M hanger and a Walbro in-tank pump with sock. My assumption is that my pump screen and sock would provide the 100 micron prefiltering, and I would install the Blueprint 10 micron filter in the line from the tank to the regulator.

My current plan is to locate the final filter (10 micron) where FFR shows filter mounting near the PS rear wheel well. Plan is run 3/8" supply and return Nicopp hard lines from front to rear. Connections to/from the hanger, filter, regulator and engine would be 6AN braided PTFE.

I'd be grateful for any feedback on my plan, fav sources for fittings and adapters, etc. I have the 3/8" Nicopp already. From Advance Auto. Needed a short section for something else and bought a 25ft roll knowing this was coming.

Thanks,

Pat

[gbranham]

I like Evil Energy AN fittings. They've all been great, and priced right on Amazon. Lots of very positive reviews, too. I did hard lines from in front of PS footbox to just below the upper trunk floor, then PTFE braided for the rest. Worked fine, but ended up ripping it all out and started over with braided PTFE home runs to eliminate unions. So, I have home run from my fuel filter to the pressure regulator on the firewall, and a home run back from the pressure regulator to the return on the Pro-M hanger. Then one more stainless PTFE length from Pro-M output to fuel filter, and from the pressure regulator to fuel rail. Eliminated several unions that simply weren't necessary.

Greg

[PMD24]

Thanks Greg. Will check out those fittings. I was leaning toward the hard lines because I was concerned about the look of the braided lines possibly sagging between hangers. Every time I look at the pex water mains in my basement I tell myself that's my next project. They sag slightly between every hanger and it bugs me. And the hangers are properly spaced!

Any thoughts on my concern? I looked back through your thread but didn't see any photos. Blueprint provides enough braided line to do what you did so maybe I should reconsider the hard lines. Thanks again.

Pat

[edwardb]

I've used several brands of stainless steel braided PTFE hose. It's relatively stiff. With attachments placed at reasonable distances, it doesn't sag. That's not really a concern. You're on the right track to have a 10 micron filter between the pump and the inlet to the regulator and engine. Just make sure it has enough flow capacity. I really like the Trick Flow TFS-23006 filter and have used it on all my builds. But there are other similar products.

[gbranham]

I also used that same TFS fuel filter at Paul's recommendation, after I cheaped out and went with a smaller filter. Glad I ripped out the smaller one and went with Paul's suggestion. Really nice piece. I don't think I took pictures of my redone fuel lines, but as Paul says, it's pretty stiff and won't droop with properly-spaced clamps.

[PMD24]

Paul and Greg, thank you. Blueprint is supplying the filter so I assume it will be properly sized. But I'm guessing it will have the swaged ends for rubber hose and high-pressure clamps which I'm not inclined to use. Will check out the filter you mention. Will look back at Paul's threads to see if there are photos. Do you recall the support spacing you used?

Pat

[gbranham]

I could take some measurements, but here's a picture of mine. This was before I replaced my hard lines with the home run PTFE hoses.

Fuel Filter1.jpgFuel Filter2.jpgFuel Filter3.jpgFuel Filter4.jpg

[Mike.Bray]

I have a Holley inline filter which works fine but if I was doing it again I would install a canister type like Paul and Greg have. Much easier to service.

https://www.summitracing.com/parts/a...RoCDL4QAvD_BwE

[Papa]

I redid my entire fuel system a little over two years ago. I originally ran braided lines for the entire run on both supply and return. Like you, the look bothered me, so when I redid the system I used hard lines from the engine compartment in front to the rear in the area where the frame behind the cockpit wall is. I used PTFE braided lines to complete the system. I used the Pro-M hanger with Walbro pump in the tank and a Holley 10 micron serviceable filter. Don't flair the NiCop lines. Look at the Hamlet compression fittings instead. Breeze sells them and they are high quality.

https://breezeautomotive.com/shop/fi...ainless-steel/

You can also get mounting hardware specifically designed for mounting 3/8" lines to the 4" round frame.

https://thefactoryfiveforum.com/show...l=1#post487888

[lewma]

I built my fuel system using a mixture of Evil Energy, Earls, and Holley components. Mainly purchased from amazon

[Mike.Bray]

I redid my entire fuel system a little over two years ago. I originally ran braided lines for the entire run on both supply and return. Like you, the look bothered me, so when I redid the system I used hard lines from the engine compartment in front to the rear in the area where the frame behind the cockpit wall is. I used PTFE braided lines to complete the system. I used the Pro-M hanger with Walbro pump in the tank and a Holley 10 micron serviceable filter. Don't flair the NiCop lines. Look at the Hamlet compression fittings instead. Breeze sells them and they are high quality.

https://breezeautomotive.com/shop/fi...ainless-steel/

You can also get mounting hardware specifically designed for mounting 3/8" lines to the 4" round frame.

https://thefactoryfiveforum.com/show...l=1#post487888

These work well also for the relatively low pressure fuel lines.

https://www.holley.com/products/plum...ts/AT165006ERL

[gbranham]

I used Evil Energy's compression fittings, as Mike shows above. Worked well, and super easy to install. That is, of course, before I ripped out all my hard lines. Sigh...

[BRRT]

I used a mix of 3/8" NiCopp tube and 3/8" (-6AN) Earl's VaporGuard hose and fittings. The VaporGuard hose is flexible and easy to work with.

[PMD24]

I redid my entire fuel system a little over two years ago. I originally ran braided lines for the entire run on both supply and return. Like you, the look bothered me, so when I redid the system I used hard lines from the engine compartment in front to the rear in the area where the frame behind the cockpit wall is. I used PTFE braided lines to complete the system. I used the Pro-M hanger with Walbro pump in the tank and a Holley 10 micron serviceable filter. Don't flair the NiCop lines. Look at the Hamlet compression fittings instead. Breeze sells them and they are high quality.

https://breezeautomotive.com/shop/fi...ainless-steel/

You can also get mounting hardware specifically designed for mounting 3/8" lines to the 4" round frame.

https://thefactoryfiveforum.com/show...l=1#post487888

Thank you for the feedback and links. A couple of quick questions... not sure if you've disassembled any of the fittings but did you feel any galling taking place as you tightened the stainless on stainless?

Thanks,

Pat

[PMD24]

These work well also for the relatively low pressure fuel lines.

https://www.holley.com/products/plum...ts/AT165006ERL

Thanks Mike. Blueprint has been very responsive to questions but not so good on make/model info of the fuel system components. I'm pretty confident that the filter isn't the canister type that everyone here recommends. I'm going to go with the canister style. I'll just order one, and then return it, if Blueprint supplies a canister style.

Pat

[rich grsc]

So what's the obsession with fuel filters? When was the last time you needed to change one on your daily driver, at what milage? You'll drive your regular car many times more than the cobra. Many new cars don't have a replaceable fuel filter.
Just something to think about before spending hundreds on one.

[Mike.Bray]

So what's the obsession with fuel filters? When was the last time you needed to change one on your daily driver, at what milage? You'll drive your regular car many times more than the cobra. Many new cars don't have a replaceable fuel filter.
Just something to think about before spending hundreds on one.

If you buy a nice inline one like the Holley and add the mounting clamps it's almost as much as the Trick Flow cannister one so I would choose the cannister style. The issue isn't everyday use and milage, it's the anomaly when you get junk in the tank. It happens.

[Mike.Bray]

not sure if you've disassembled any of the fittings but did you feel any galling taking place as you tightened the stainless on stainless?

NEVER ever assemble stainless on stainless dry, always use anti-seize.

[PMD24]

This thread is a great example of how awesome this forum is. Great feedback and help. But beyond that, different approaches, differing views on what appeals, benefits in each of the different solutions, and all offered up without any critique on other's input.

I've settled in on NiCopp hard lies, black fittings where visible, probably brass elsewhere, canister filter, ss braided hose at hanger, filter, and regulator. Also like the mounting hardware that Papa used.

Thanks to all for helping out with the solution.

Pat

[PMD24]

So what's the obsession with fuel filters? When was the last time you needed to change one on your daily driver, at what milage? You'll drive your regular car many times more than the cobra. Many new cars don't have a replaceable fuel filter.
Just something to think about before spending hundreds on one.

Good point. I wasn't focused so much on the maintenance. More so on not wanting the rubber hose and fittings. Mostly an aesthetic thing for me.