Fuel line recommendations

Discussion in 'High Tech for Old Iron' started by Electra Bob, Mar 18, 2019.

  1. Electra Bob

    Electra Bob Well-Known Member

    Biting the bullet on the Sniper Quadrajet EFI for the Electra and replacing the entire fuel delivery system from end to end.

    I've checked out the stock fuel line routing and it's all easily accessible and has little exposure to potential road hazard. The question is - what to use for the new lines?

    I'm thinking Earls hose all the way with a small bulkhead bracket at either end of the main fixed run then shorter hoses for tank and regulator/throttle body connections.

    Should I stump up for Ultra-pro for the main run for it's tighter bend radius ability and more rugged sheathing or cheap out and use Vapor Guard all the way - or something in between?

  2. TrunkMonkey

    TrunkMonkey Well-Known Member

    I used stainless for the body line and had Pegasus make all the smaller lines from tank to regulator, regulator to return, regulator to 100 micron filter, filter to body line, body line to EFI (40 micron and small hardlines at the TBs). I used "Earls" for all the fittings.

    No rubber or soft lines anywhere.
    1973gs likes this.
  3. Electra Bob

    Electra Bob Well-Known Member

    Hey Michael, thanks for the feedback and apologies for taking so long to acknowledge it.

    I decided to go with Earl's Ultrapro with the Black Polyester external sheathing. This is pretty rugged and uses twist on hose ends that only requires basic tools for fitting. It also has a 1" minimum bend radius which means it can handle the twists and turns of the line route.

    The open frame rails on the Electra allow for the main run to be tucked out of harms way. There are only two short sections that have some exposure and I would contend that the rugged sheathing and ability to deform and return to normal if struck make it as or perhaps more resilient than hard line. Its flexibility also allows for body flex, engine movement and expansion/contraction due to temperature changes.

    TrunkMonkey likes this.
  4. TrunkMonkey

    TrunkMonkey Well-Known Member

    You should be fine with that. :)

    There are pros and cons to both hard and soft lines like you are considering.

    And some of the newer stuff is pretty impressive durability. (and not the same league as the soft/rubber stuff I was referring).

    I may use that on my 1968 that is work in progress.
  5. 72gs4spd

    72gs4spd Well-Known Member

    Used -6AN ptfe lined hose from Hotrodfuelhose.com. Nice quality and they have packages as well.
  6. Ken Warner

    Ken Warner Stand-up Philosopher

    With FI pressures you are rolling the dice with standard braided rubber hose. Buy once and cry once go PTFE. Use the boards search function for more info.
    72gs4spd likes this.
  7. 1973gs

    1973gs Well-Known Member

    I used 3/8 plastic/nylon line made in USA by SUR&R. It's easy to run through the frame into the engine compartment. I switched to Earl's PTFE where it comes out of the hole in frame and then used 3/8 steel to the throttle bodies. I have never seen the plastic line fail, except when GM thought it was a good idea to make the fuel rails on Cadillac's and Olds Aurora's, too much heat on an intake manifold, or when someone kinked it. We use it at work to replace rotted out steel lines on our fleet vehicles. On those, we use a plastic fuel filter that accepts the quick connect ends. Two of my cars are 1994's withe 140,000+ miles on them with no issues. No matter what style line you use, the fittings start adding up quickly.
    Last edited: Apr 29, 2020
  8. Mike T

    Mike T Well-Known Member

Share This Page