Thanks Thanks:  0
Likes Likes:  0
Dislikes Dislikes:  0
Page 1 of 2 12 LastLast
Results 1 to 15 of 24
  1. #1
    New Member
    Join Date
    Jan 2005
    Location
    Ottawa, Ont
    Posts
    11
    Corvette(s)
    1977 Red Coupe
    Post Thanks / Like
    Rides
    0

    Default Fuel pump with no return line

    I want to replace my stock fuel pump with an Edelbrock 110psi pump (mechanical). The stock pump has a tank return line but the Edelbrock doesn't. Is it necessary to use the return line with this new pump? Can the return line simply be blocked-off? Any advise is appreciated.

    Rob

  2. #2
    Member Vettehead Mikey's Avatar
    Join Date
    Aug 2003
    Location
    Not that far from Ottawa
    Posts
    3,481
    Corvette(s)
    1973 Coupe
    Post Thanks / Like
    Rides
    0

    Default

    Quote Originally Posted by rob77
    I want to replace my stock fuel pump with an Edelbrock 110psi pump (mechanical).
    Why? Please don't tell us it's because you think it's an 'upgrade'.

  3. #3
    Member Eddie 70's Avatar
    Join Date
    Oct 2002
    Location
    Kingston, Tn
    Posts
    383
    Corvette(s)
    1970 Convertible LS6 and an 02 EB Z06
    Post Thanks / Like
    Rides
    0

    Default

    Quote Originally Posted by rob77
    I want to replace my stock fuel pump with an Edelbrock 110psi pump (mechanical). The stock pump has a tank return line but the Edelbrock doesn't. Is it necessary to use the return line with this new pump? Can the return line simply be blocked-off? Any advise is appreciated.

    Rob
    I think you mean GPH not PSI. I did exactly this and yes I blocked off the return line. The only thing I can think of that the return line might prevent is vapor lock. I have had none of this with the currrent setup and have over 3000 miles on it. Go forward with your project.

  4. #4
    Fuel pump with no return line GerryLP's Avatar
    Join Date
    Apr 2001
    Location
    Rio Rancho, NM
    Posts
    2,151
    Corvette(s)
    1981 HD Suspension; ZN1 Option
    Post Thanks / Like
    Rides
    0

    Default

    I have had no problems on this issue also. My Holley fuel pump works fine. Get a rubber cap and clamp for the return line.

    It's true, there is probably no difference between aftermarket and stock pumps, but IMHO, on a street/strip car one would want insurance on fuel delivery on heavy loads such as drag racing. I am all for making a vehicle so dependable that it is "heavy duty" ready...

    GerryLP

  5. #5
    Member Vettehead Mikey's Avatar
    Join Date
    Aug 2003
    Location
    Not that far from Ottawa
    Posts
    3,481
    Corvette(s)
    1973 Coupe
    Post Thanks / Like
    Rides
    0

    Default

    Quote Originally Posted by GerryLP
    I I am all for making a vehicle so dependable that it is "heavy duty" ready...

    GerryLP
    The stock pump is already heavy duty - it was used in road racing and drag situations on L-88s. Is that not enough overkill for everybody?

    The stock pump also RARELY fails in service, except from old age. Aftermarket pumps do not have any track record of being more reliable than the stock component

    Again I ask, what does the original poster expect to improve by removing his reliable, overkill heavy duty pump and replacing with an aftermarket piece that has to be jury rigged to work?


    Maybe people are watching too much 'pimp my ride' or reading too many Summit catalogues?

  6. #6
    celeryman22
    Guest

    Default

    Hey Mikey this is the same thing you went through with me. The problem with me is I already purchased and installed mine before I heard your arguements. I totally agree with you, this is why I ran the extra fuel line even though it won't be used. I personnally hate have things not connected maybe in the end I will swap out my Edelbrock pump for a stock model.

    Regards,
    Mike

    PS. My "wife" always says I read too many catalogues!

  7. #7
    Fuel pump with no return line GerryLP's Avatar
    Join Date
    Apr 2001
    Location
    Rio Rancho, NM
    Posts
    2,151
    Corvette(s)
    1981 HD Suspension; ZN1 Option
    Post Thanks / Like
    Rides
    0

    Default

    Quote Originally Posted by Vettehead Mikey
    The stock pump is already heavy duty - it was used in road racing and drag situations on L-88s...Maybe people are watching too much 'pimp my ride' or reading too many Summit catalogues?
    I'll take your word on the fuel pump origin, and I'll risk taking a tangent track on the original issue here, but a lot of folks act as if original manufacturers are the "authority" on what works. They may be the authority on what was part of a particular model of vehicle that they produced, but they don't have the innovation market cornered.

    Giants like the General mostly react to what the public is after if they see a business sense into it. As a result, they tend to be behind the curve on what the customer wants. Truely, the top car manufacturers can afford all the R&D that one can throw at them, but generally speaking, the garage entrepreneur or innovator is the one that is able to make the big technological leaps on performance. They are able to correct whatever shortfalls the top manufacturers left out of their design, and thus, capitalize on the public's demand. We're just numbers to the General.

    Again, I agree that the fuel pump does seem to last for along time, and that the design is probably suited for normal driving or even keep up with powerful motors out there. However, one should not knock the role that the aftermarket products have in todays economy. A lot of folks are not willing to only take what the manufacturers have planned for us. Some folks will demand more. If I recall history correctly, the Corvette (some people argue that the Camaro or even the Chevy II) motivated Ford to design the venerable Mustang -reaction to the publics desires personified!

    GerryLP

  8. #8
    Fuel pump with no return line RodsnRides's Avatar
    Join Date
    Aug 2004
    Location
    Denver, CO
    Posts
    485
    Corvette(s)
    '72 Targa Blue Coupe
    Post Thanks / Like
    Rides
    0

    Default

    GerryLP-

    While I can generally agree with your statements, my version of history has it the Corvette was a stand alone US offering in 1953-built as a reaction to Triumph, MG and perhaps Jaguar. The Thunderbird was Ford's reaction to the Corvette. And the Cobra was Carroll Shelby's response to Zora Arkus-Duntov's improved Corvette.

    The Mustang was good market sense at the time, and the Camaro was the General's reaction to it. The Chevy II/Nova and Ford Falcon were, I believe, built to compete with the Valiant/Dart.

    As far as the aftermarket-while stock offerings (especially L-88, LS-6, ZR-1, etc.) can be excellent, there is always room for and a market for improvement. Edelbrock, Crane, Comp Cams, etc. are living proof. How many Performer manifolds do you suppose are out there? I personally have 4 installed-but not on the Corvette-yet.

    Rick

  9. #9
    Fuel pump with no return line GerryLP's Avatar
    Join Date
    Apr 2001
    Location
    Rio Rancho, NM
    Posts
    2,151
    Corvette(s)
    1981 HD Suspension; ZN1 Option
    Post Thanks / Like
    Rides
    0

    Default

    Quote Originally Posted by RodsnRides
    GerryLP-

    While I can generally agree with your statements, my version of history has it the Corvette was a stand alone US offering in 1953-built as a reaction to Triumph, MG and perhaps Jaguar. The Thunderbird was Ford's reaction to the Corvette. And the Cobra was Carroll Shelby's response to Zora Arkus-Duntov's improved Corvette.

    The Mustang was good market sense at the time, and the Camaro was the General's reaction to it. The Chevy II/Nova and Ford Falcon were, I believe, built to compete with the Valiant/Dart.

    As far as the aftermarket-while stock offerings (especially L-88, LS-6, ZR-1, etc.) can be excellent, there is always room for and a market for improvement. Edelbrock, Crane, Comp Cams, etc. are living proof. How many Performer manifolds do you suppose are out there? I personally have 4 installed-but not on the Corvette-yet.

    Rick
    Rick,

    Thanks for correcting my historical characterization, but your comments has strenghtened my point anyway. The big manufacturers react...

    GerryLP

  10. #10
    Member Vettehead Mikey's Avatar
    Join Date
    Aug 2003
    Location
    Not that far from Ottawa
    Posts
    3,481
    Corvette(s)
    1973 Coupe
    Post Thanks / Like
    Rides
    0

    Default

    Somebody please tell me what any aftermarket pump will do better than the stock unit.

  11. #11
    New Member
    Join Date
    Jan 2005
    Location
    Ottawa, Ont
    Posts
    11
    Corvette(s)
    1977 Red Coupe
    Post Thanks / Like
    Rides
    0

    Default

    Thanks for all the comments.

    I'm rebuilding my engine and sprucing-up the engine compartment at the same time. I'm considering the aftermarket pump for 2 reasons: the first is performance - I thought the aftermarket pump actually pumped more fuel than stock (110 GPH vs 80 GPH). The second reason is for looks.
    The only reason I 'm considering Edelbrock is that I'll be upgrading to their Intake and carb at the same time.
    Rob

  12. #12
    celeryman22
    Guest

    Default

    Rob, I also used the edelbrock pump, with the edelbrock intake and carb. I am also using the edelbrock heads. Haven't got it running yet, I am waitng on a set of headers and the actual carb.

  13. #13
    Member
    Join Date
    Oct 2001
    Location
    Wasilla, Alaska, U.S.A.
    Posts
    584
    Corvette(s)
    '77 L-82, black on black. Full mod 406 small block
    Post Thanks / Like
    Rides
    0

    Default

    Rob,
    i have the same pump you are considdering, but it's rated at 140 gpm and 11-14psi. it feeds 600hp pretty good. with no return line you are subject to heating of the fuel in the pump and line. this causes vapor lock and boiling of fuel in the float bowls. i have seen this first hand with my unit, plus sidepipes don't help with keeping fuel cool. i fixed the problem with it by utilizing a by-pass return regulator. the pressure regulator will send all fuel to carb under your pressure setting, usually 6 psi for carbs. anything over your "pop-off" pressure setting will return to tank. this does two very important things for you. first and foremost it keeps the fuel cold and circulating. secondly is a dynamic, flowing, fuel system will not experience the momentary drop in pressure once the carb requires more fuel. the colder your fuel, the more power you will make. i must warn you that by-pass regulators run $100-$140. it is a far better option than just running a shut-off pressure regulator for $30. also the by-pass hooks up to your return line just like a stock pump would. Aeromotive makes some pretty good looking units, that's what i ended up with. your stock pump only returns from the pump back. going you're proposed route, your return will be just before the carb. this keeps the fuel nearly at tank temps when it hits the carb. the stock system can heat the fuel 50 degrees before it gets to the carb. that measurement was taken from my car. bottom line is the new stuff is better, but not cheap. you will have to weigh your options and costs and make your own mind up. Brian

  14. #14
    Fuel pump with no return line
    Join Date
    Jan 2002
    Location
    Washington, Michigan
    Posts
    7,246
    Corvette(s)
    '67 Marina Blue Convertible
    Post Thanks / Like
    Rides
    0

    Default

    Quote Originally Posted by rob77
    Thanks for all the comments.

    I'm rebuilding my engine and sprucing-up the engine compartment at the same time. I'm considering the aftermarket pump for 2 reasons: the first is performance - I thought the aftermarket pump actually pumped more fuel than stock (110 GPH vs 80 GPH). The second reason is for looks.
    The only reason I 'm considering Edelbrock is that I'll be upgrading to their Intake and carb at the same time.
    Rob
    Not flaming here, but "performance" has nothing to do with a fuel pump unless you're making over 600hp and suffering from WOT fuel starvation; the stock pump is more than adequate for an L-88 under race conditions, so don't be fooled into thinking that an aftermarket pump is going to do anything at all for "performance", unless your current pump has failed completely. "Improved performance" is the aftermarket's favorite phrase. If you like the looks of the chrome aftermarket pump, go for it, but that's the only "benefit" you'll see from an aftermarket pump; don't expect any "performance" increase - all the pump does is keep the float bowl full.

  15. #15
    Member
    Join Date
    Oct 2003
    Location
    wareham, MA
    Posts
    369
    Corvette(s)
    1975 red coupe
    Post Thanks / Like
    Rides
    0

    Default

    Quote Originally Posted by Vettehead Mikey
    Somebody please tell me what any aftermarket pump will do better than the stock unit.
    The aftermarkets pumps are more pretty?

Page 1 of 2 12 LastLast

Similar Threads

  1. 71 SB Fuel Pump leak
    By lostintime53 in forum C3 General Discussion
    Replies: 5
    Last Post: 03-08-05, 01:12 PM
  2. Aeroquip fuel line journey notes...
    By Chas in forum C3 Technical and Performance
    Replies: 4
    Last Post: 03-07-04, 11:23 AM
  3. Bad Fuel Pump??????
    By Mciamp99 in forum C4 Technical and Performance
    Replies: 3
    Last Post: 03-20-03, 11:08 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •