fuel pump and regulator

[bill gade]

i am using LS1 engine looking for ideas for external fuel pump and regulator with return,any tips on running fuel lines.had one idea of using braided line all the way

[geoffav]

Originally Posted by bill gade

i am using LS1 engine looking for ideas for external fuel pump and regulator with return,any tips on running fuel lines.had one idea of using braided line all the way

Welcome, I went with an Aeromotive system for my setup. At the moment I'm using soft lines to connect the pressure and return lines. I might switch to hard lines if I see some risk or problems with maintenance. If the current lines are too short when I start plumbing my Boyd tank I'll go with hard lines then too.

[robboy]

i am using LS1 engine looking for ideas for external fuel pump and regulator with return,any tips on running fuel lines.had one idea of using braided line all the way

I ran a combination of Aeroquip AQP push on and braided stainless lines from the tank to the regualtor and carb and return to the tank. Unfortunately, with todays fuel there was a real problem with permeation of fuel odor from the lines. And I don't mean a small problem. Overnight the garage smelled like a large gas spill. I put the car outside and you could put your nose up to the fuel line at just about any point and smell a very strong gas odor. I had to redo the whole thing with hard lines and a combination of low permeation marine fuel line from the tank to the hard lines and a short piece of AQP from the regulator to the carb. No more problems. I lost a lot of money on this as AQP isn't cheap and I had to sell the fittings and a lot of the hose as used. Maybe it's just the fuel where I live and maybe it'll work for you but I think hard line is the best way to go.

[geoffav]

Originally Posted by robboy

I ran a combination of Aeroquip AQP push on and braided stainless lines from the tank to the regualtor and carb and return to the tank. Unfortunately, with todays fuel there was a real problem with permeation of fuel odor from the lines. And I don't mean a small problem. Overnight the garage smelled like a large gas spill. I put the car outside and you could put your nose up to the fuel line at just about any point and smell a very strong gas odor. I had to redo the whole thing with hard lines and a combination of low permeation marine fuel line from the tank to the hard lines and a short piece of AQP from the regulator to the carb. No more problems. I lost a lot of money on this as AQP isn't cheap and I had to sell the fittings and a lot of the hose as used. Maybe it's just the fuel where I live and maybe it'll work for you but I think hard line is the best way to go.

I'm using the Gates push-loc hose from Jegs and it should not smell. I'll make sure before going putting the body on. The new fuels do nasty things to hose. It might be better to go ahead and use hard line for the long runs from tank to regulator. I might get good service out of the hose for years and then have to replace it all. The hard lines will be a one time install.

[jonathanch]

Get Wix #33737. It is a filter/regulator combination and it eliminates a return line up to the motor. It is used on all the C5 Corvettes. Then get Jegs # 159000 fuel pump kit.
Here is what it looks like all plumed up.. There are some fittings you will need but I don't have the numbers handy at the moment. As you can see I ran 6AN line out of the filter to the motor. I am going to use Holley Fuel Rail Kit # 534-209. Don't have any pictures as that has not arrived yet. Hope this helps. Let me know if you need more photos.

[Tim Whittaker]

Is that the battery cut off switch below all those fuel lines ?

[jonathanch]

Yes. Is that a problem?

[Tim Whittaker]

I don't think so. I'm using an electric one made by Painless Wiring and was going to mount it somewhere in the back near the battery. When I saw your picture, it just made me think about mounting electrical stuff near fuel lines.

However, an "in-line " or "in tank" electric fuel pump is about as close to a fuel line as you can get with electricity I guess. LOL !!!! It just made me wonder what it was.

Enjoy following your build, thanks for sharing all the pics !!!!

[geoffav]

Common practice and sometimes Standards for aviation would dictate putting electrical above fluid whenever possible.

It will standout when someone in that field notices a deviation from "common practice". These cars are not airplanes and even on aircraft we deviate on occasion.

Aviation practices are normally sound advice.

Where practical, route electrical wires and cables above fluid lines and provide a 6 inch separation from any flammable liquid,fuel_ or oxygen line, fuel tank wall, or other low voltage wiring that enters a fuel tank and requires electrical isolation to prevent an ignition hazard. Where 6 inch spacing cannot practically be provided, a minimum of 2 inches must be maintained between wiring and such lines. related equipment, fuel tank walls and low voltage wiring that enters a fuel tank. Such wiring should be closely clamped and rigidly supported and tied at intervals such that contact between such lines, related equipment, fuel tank walls or other wires, would not occur, assuming a broken wire and a missing wire tie or clamp.

[Tim Whittaker]

Geoff and I are both from an aviation background and once immersed in that, you tend to look at all things in life from that perspective. I'm guessing it's from the daily "life and death" exposure and a required approach to things in life the average person isn't confronted with routinely.

Didn't mean to cause undue concern. There's more than one way to build these things.

From a builders perspective, it's probably somewhat of a curse. My guess would be Geoff and I have more spare parts from our 33 builds than most due to the way we tend to approach things and our inability to let something go we feel can be done differently. Usually better, in our minds anyway. Problem is I'm usually wrong but have managed to stay alive in spite of it all.