Vapor Canister and overflow update input

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    Author Topic: Vapor Canister and overflow update input  (Read 1318 times)

    Offline Mickm

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    Vapor Canister and overflow update input
    « on: October 13, 2015 - 10:28:37 AM »
    Hi Guys,
    Well, I am getting all my thoughts and ideas together for work I plan to do this winter to the Cuda.

    One thing I want to address is the gas tank/over-flow. This car had a new aftermarket tank installed when when it was restored. The original vapor separator was reused but I found one of the ports leaking so I built a new one and while it has performed fine, I am not total satisfied with the results. I have the four vents going into the vapor separator then a hard line out to the fender well then up and over for overflow.
    The gas gauge never works properly and since I am changing to new modern gauges and a F.A.S.T. EFI system I am wondering what my best avenue is for the gas tank. Do I stay with this new tank and add an in-tank fuel pump (or is that even possible with the side mount), remote electric pump with this tank or get a new stainless tank with built in fuel pump?
     
    What have you done to create a good vent system especially if you have the EFI?

    All input is appreciated.

    Cheers!
    Mickm
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    MickM


    Offline Mickm

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    Re: Vapor Canister and overflow update input
    « Reply #1 on: October 26, 2015 - 01:09:43 PM »
    No one is running a modified fuel setup or a FAST efi setup?

    Any input would be greatly appreciated.

    Cheers!
    Mickm
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    MickM

    Offline WildJones

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    Re: Vapor Canister and overflow update input
    « Reply #2 on: October 26, 2015 - 03:48:16 PM »
    Check out the Tanks Inc EFI tank. I am looking at that setup for my build, granted I will be running a carb for now. Theres also the Holley Hydramat setup which has dropped in price and might actually be attainable. Even if you don't go with the Tanks Inc setup, their site has a lot of helpful information that should help with your purchase.
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    Mike
    95682
    1970 Cuda

    Offline YellowThumper

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    Re: Vapor Canister and overflow update input
    « Reply #3 on: October 26, 2015 - 03:58:00 PM »
    Overall I don't believe there is a significant difference in vent requirements between carb and EFI. There are higher pressures but your engine still uses the same amount of fuel. Even with a return style setup, you are pulling more fuel but at same time unused fuel is returning.  I am currently using an external pump with a return line on my 74 and have no issues. No baffling either. But it is only a street car with an occasional launch.  I make sure not to run the tank too low. I do however still have the original 1/4 Dia vent line that goes to front charcoal canister.

    I am on a long slow road to eventual EFI and twin turbo so I am converting items piece by piece in order to keep being able to drive it. Currently running on carb but have all the other physical hardware for EFI. Ele pump, port injectors and rails, etc. Throttle body and plenum in the works.
    Same regulator will work for both carb and EFI with just a spring change.
    My intended goal will be an in tank and baffled setup such as Tanksinc when the conversion is complete.

    There is no real difinitive answer to your question.
    A lot depends on your overall goals.
    Replacing tank with one already setup with pump and baffling would be easier but generally would cost more.
    If you are a do it yourself person then building your own custom setup is for you. Could be lower cost but any hickup along the way any cost savings is quickly negated.
    Any in tank setup will run quieter and pump will run cooler then external.
    So if you plan on long trips and don't want to listen to pump drone on. In tank should be considered.

    Mike
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    Offline crash340

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    Re: Vapor Canister and overflow update input
    « Reply #4 on: October 26, 2015 - 05:32:14 PM »
    I have a new OEM style 4 vent tank in my Cuda that I will be fitting an Aeromotive Phantom intank pump into shortly, it will be put in the front left corner as done by others, I will be removing the charcoal canister stuff once the new motor and EFI go in. As for tank venting I have asked this question recently on here and have not got a lot back, in any case, pending how well the install goes of the pump, the tank (I believe) has the 4 vent tubes with anti rollover valves at the end of each tube inside the tank, right now I'm sitting on the fence as to do I simply use these as my tank vent system and instead of running the vent line forward to nothing as such, plumb a flex line into a wheel well up high etc, and or if I use the vent line on the Phantom, do the same somehow!!! if I run it into the trunk its going to smell of fuel vapors inside the car for sure. anyway, the vent line is my headache for now and how to do it, will keep you all updated once I come up with a plan,,,,, open to ideas
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    Greg

    73 Cuda
    Brisbane, Australia

    Offline YellowThumper

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    • I left the snow for this?
    Re: Vapor Canister and overflow update input
    « Reply #5 on: October 26, 2015 - 11:04:53 PM »
    On my setup I  also removed the charcoal canister but I rerouted the line into the outer front fender well so it cannot be seen. Added a 180 deg bend so it points downward and also clamped on a fuel filter to keep any debris out. No issue with fumes inside car.

    Mike

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    Offline MrForce

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    Re: Vapor Canister and overflow update input
    « Reply #6 on: October 29, 2015 - 10:38:34 PM »
     I ordered this from Amazon, Spectra Premium CR8FFI. The car fired up with two gallons splashed into the tank. But no miles yet as other work is pending. It is very quiet compared to the previous frame mounted external pump.

    As far as tank venting, look at a piece from II much fabrication. It is a bit pricey compared to plastic fuel filters and fish tank components, but is probably the most efficient and elegant solution. Very popular with the Pro Touring crowd.

     

    Rob
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    Offline Mickm

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    Re: Vapor Canister and overflow update input
    « Reply #7 on: October 30, 2015 - 12:50:09 AM »
    Thanks for all the input guys, I really appreciate it. I will do some research from your suggestions towards an in-tank pump for the reproduction tank first. If this isn't a good option, I'll look at a Tanks' setup with pump or one from Ricks Tanks.

    As for the vent, currently I have made a setup that seems to work fine for a non efi setup. I made a replacement vapor canister that mounts in the oem location and is fed by all four oem vent lines from the repro tank.
    Then a stainless hardline runs inside the rear crossmember, turns up vertical at the fender well, goes about a foot or so up and to a 180° bend with a micron filter on the end. No gas fumes to be found anywhere.

    Cheers!
    Mickm
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    MickM
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