1. If you have recently registered with a gmail email address, you must contact me, as gmail will not forward our confirmation email to you. Contact me and jim@trishieldperformance.com to complete your registration.
    Dismiss Notice
  2. In and effort to reduce the spam on the site, several years ago I had went to a program where I manually approve each and every new registration. This approval gives you full access to the site, to pictures, and to post, among other things. To be able to enjoy the full potential of the board for you, you need to be fully registered.. and that's easy.. Just send an email to me at jim@trishieldperformance.com and I will verify your registration. This policy will remain in effect indefinitely, as it has completely eliminated the bad actors from our site, who would spam and hack it, once they gained access. Thanks JW
    Dismiss Notice
  3. The "Group Buy" for the 1967-68 Deluxe Steering wheel recasting is now officially "Open". Now is the time to start sending in the wheels. The latest date that the wheels must be received by Kochs is 31 March 2025 The cost for each wheel is $750. The only "up front cost" is your shipping the wheel. If you send in more than one wheel, each additional wheel will cost $700. Shipping and insurance to Kochs and return shipping will be extra. You will be contacted by Teresa to make payment for the wheel(s) and return shipping and insurance when your wheel(s) is complete. The shipping will be factored on your delivery address and insurance. I will be sending the contact information all of you have sent me to Teresa at Kochs. Send in your wheels, horn pad and hardware and paint color sample if applicable. Please include: First and Last Name Shipping Address Phone number email address V8Buick "Member Name" Wheel Color (SEE THE BOTTOM FOR WHEEL COLOR) Pease read the "shipping to Kochs" below. There are two addresses. One for USPS Mailing One for FedEx and UPS shipping You can use USPS/Mail, UPS or FedEx to send in your core. Use the appropriate address depending on what service you use to ship. If you use USPS/Mail ship to: Koch's P.O. Box 959 Acton, CA 93510 Attn: Teresa If you use UPS or FedEx ship to: Koch's 7650 Soledad Canyon Road Acton CA 93510 Attn: Teresa Kochs Contact: Teresa (661) 268-1341 customerservice@kochs.com Wheel Color If you wheel is Black, you can list that in your information you send in with your wheel. For colored wheels, please contact Teresa about specifics for wheel color if you do not send in a color sample to match. Please contact me if you have any questions. Thank you to everyone for your participation in making this a reality. And "Thank You" Jim Weise, for allowing and facilitating this project! Michael .................... to remove this notice, click the X in the upper RH corner of this message box
    Dismiss Notice
New users Registered with a gmail address Attention All new Users 67-68 Deluxe Steering wheel recast Group buy

Fuel return line

Discussion in 'The Mixing shop.' started by BillA, May 11, 2011.

  1. BillA

    BillA Well-Known Member

    I'm considering replacing the current fuel tank sending unit in my '64 Skylark with one that incorporates a 1/4" return line connection. I'll be using a Mallory 4110 electric pump with the 4309 regulator so I can keep the fuel pressure set to a level that keeps the Q-Jet happy (the pump is set for 7PSI which may be a little high for the Q-jet). The 4309 regulator has provision for a 3/8" return line but I'd like to reduce it to 1/4" so it's compatible with the return built into the sending unit. Is this acceptable at that fuel pressure level or should I get a single line sending unit and braze a 3/8" return line fitting onto the tank (I'm replacing the tank as well)?
     
    BillA, May 11, 2011
    #1
  2. BillyBoy

    BillyBoy Well-Known Member

    I tried a similar setup on my 71 and found the 1/4" return could not flow
    enough fuel at idle for the regulator to work. It would just get backed up and
    the fuel pressure would jump way past what the q-jet needle could handle.

    You have to remember, at idle the pump is trying to push the same volume as
    it would be at full throttle but all the fuel is going to the return line instead of
    the engine.

    I ended up using a 2-port non-bypass regulator.
     
    BillyBoy, May 11, 2011
    #2
  3. regal81455

    regal81455 Well-Known Member

    Im using a 4140 and the 4309 and the directions specifically state that the return must be atleast the same size as the supply but its recommended to be one size larger.
     
    regal81455, May 11, 2011
    #3
  4. TheSilverBuick

    TheSilverBuick In the Middle of No Where

    Generally you want to run a return line either equal to your feed or only one size smaller at most.

    My set up runs a 3/8th mechanical pump to a surge tank, then a 5/16th to the fuel rails and a 5/16th back to the surge tank and fuel tank. How ever my primary 3/8th feed being mechanical is pumping less volume at idle than at higher rpm. IF I were running a 3/8th electric pump from the tank, I'd probably need a larger return line.
     
    TheSilverBuick, May 11, 2011
    #4

Share This Page