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Thread: Return Line

  1. #1

    Default Return Line

    My '87 Camaro came from the factory with a carbureted 305. The mechanical pump has a return line that's 1/4", according to the hose that goes from the pump to the hard line. Would this be OK to use as a return? Is there much fuel or any psi in a return line? Thanks.


  2. #2
    Join Date
    Dec 2009
    Location
    Connecticut
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    19,283

    Default

    May God's grace bless you in the Lord Jesus Christ.

    '78 BRONCO: 508" stroker, TFS heads, 11:1 comp ratio, Dominator MPFI & DIS, cold air induction, Spal dual 12" fans/aluminum radiator, dual 3" exhaust/Magnaflow mufflers, Moroso vacuum pump, Accusump, engine oil & trans fluid coolers, 100HP progressive dry direct-port NOS, A/C, LenTech Strip Terminator wide-ratio AOD/2500 RPM converter, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim joint steering, Cage long radius arms, traction bars, 4" Skyjacker lift, 35" mud tires

  3. #3

    Default

    I can almost guarantee you it will be too small and create too much back pressure. My first EFI was a used Holley TBI Pro-Jection 2BBL setup. Even that created too much pressure in a 1/4" return line.

  4. #4

    Default

    Quote Originally Posted by 440roadrunner View Post
    I can almost guarantee you it will be too small and create too much back pressure. My first EFI was a used Holley TBI Pro-Jection 2BBL setup. Even that created too much pressure in a 1/4" return line.
    I was hoping that line would work, so I wouldn't have to drop the tank, but it looks like dropping the tank is the way to go to do it right. I bought the Master Kit, so I'll just put the return hopefully somewhere on the sending unit if there's enough room.

  5. #5

    Default

    I attached my return line to my fill neck. No issues and I have 3,000 miles on it.

  6. #6
    Join Date
    Dec 2009
    Location
    Connecticut
    Posts
    19,283

    Default

    Yep, I know other users who have successfully done the same thing.
    May God's grace bless you in the Lord Jesus Christ.

    '78 BRONCO: 508" stroker, TFS heads, 11:1 comp ratio, Dominator MPFI & DIS, cold air induction, Spal dual 12" fans/aluminum radiator, dual 3" exhaust/Magnaflow mufflers, Moroso vacuum pump, Accusump, engine oil & trans fluid coolers, 100HP progressive dry direct-port NOS, A/C, LenTech Strip Terminator wide-ratio AOD/2500 RPM converter, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim joint steering, Cage long radius arms, traction bars, 4" Skyjacker lift, 35" mud tires

  7. #7

    Default

    Thanks for the replies guys. Unfortunately my filler neck isn't removable. The filler neck & tank are one piece on the 3rd generation Camaro gas tanks. So either way, my fuel tank has to come out.

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