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    Results 1 to 15 of 15
    1. #1
      Join Date
      Jan 2008
      Location
      Elk Grove, CA
      Posts
      217

      Sniper back to a Carb

      I installed a Holley Sniper in 2018 and have had nothing but problems with it. Iím thinking of going back to an Edelbrock Carb as I had one on before and never had any issues with it. My question is that I just installed a new in-tank fuel pump that I know would flow too much gph. Walbro makes fuel pumps for this install but I didnít find the specific one I need, if I go back to a mechanical fuel pump can I leave the electric fuel pump in as itís a bear to remove the fuel tank, buy all new hardware and reinstall in a 1969 Camaro

    2. #2
      Join Date
      Sep 2010
      Location
      Beach Park IL
      Posts
      2,856
      Country Flag: United States
      You don't have to change the pump. GPH is horsepower related and that isn't changing. You just need a quality bypass regulator set for carburetor pressures and a return line.
      Donny

      Support your local hot rod shop!

    3. #3
      Join Date
      Jan 2008
      Location
      Elk Grove, CA
      Posts
      217
      This fuel pump is rated at 67 gph, isn’t that too much? I know I’d have to run a fuel pressure regulator with a return, that would be the easiest option

    4. #4
      Join Date
      Oct 2004
      Posts
      2,552
      Country Flag: United States
      The Sniper was probably running ~60psi, and you'll need to regulate it down to 5.5psi for the Edelbrock. That means the pump flow will go up significantly from what it was intended for. Definitely check with a fuel gage between the return to make sure that much return flow isn't causing an increase in system pressure at idle. The regulator and/or return line size may not be setup for that high of flow to regulate.

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      Red Forman: "The Mustang's front end is problematic; get yourself a Firebird."

    5. #5
      Join Date
      Jan 2008
      Location
      Elk Grove, CA
      Posts
      217
      I could always run my mechanical fuel pump, could I just leave that expensive electric fuel pump in without it obstructing the flow? That thing was a lot of work to install

    6. #6
      Join Date
      Sep 2010
      Location
      Beach Park IL
      Posts
      2,856
      Country Flag: United States
      Don't do that, you will have a bad time.

      I have done at least 10 carbs with 255s in the tank and a quality bypass regulator from Aeromotive or Holley. It will work perfect.
      Donny

      Support your local hot rod shop!

    7. #7
      Join Date
      Jan 2008
      Location
      Elk Grove, CA
      Posts
      217

      Sniper

      I contacted Holley, Iím going to give them one more try. Iím to ship it back to them, Iíll see what happens from them and keep this posted. Iím still going to keep my Edelbrock ready and buy a good fuel pressure regulator as my back up

    8. #8
      Join Date
      Jan 2008
      Location
      Elk Grove, CA
      Posts
      217
      Ok, I received my Sniper back from Holley today. I’m going to take my time reinstalling back on to make sure everything is in order. Anybody have any advice on tips for it to work properly? I will say that it always sounded like it was sucking a lot of air, more than usual. I saw on Facebook where a guy recommended installing a carborater plate to separate all for ports for no vacumn leaks from the rear ports.

    9. #9
      Join Date
      Nov 2006
      Location
      Mountain Springs, Texas
      Posts
      4,516
      Country Flag: United States
      Did you use their recommended small orifice PCV valve? You have a big vacuum leak otherwise.
      1969 Camaro - LSA 6L90E AME sub/IRS
      1957 Buick Estate Wagon
      1959 El Camino - Ironworks frame
      1956 Cameo - full C5 suspension/drivetrain
      1959 Apache Fleetside

    10. #10
      Join Date
      Apr 2016
      Posts
      193
      What intake are you running, they seam to run best on single plane vs dual planes, people typically run single open spacer on dual planes.. also shielding the wires that are close to distributor or plug wires.

    11. #11
      Join Date
      Jan 2008
      Location
      Elk Grove, CA
      Posts
      217
      To answer the previous 2 postings, I’m running a single plane intake and a stock PVC, didn’t know anything about PVC but it makes sense.
      Now for the Sniper issue, sent it off to Holley and as usual I had it back within 2-3 weeks, looked exactly like I sent it off. No paper work on work that was done so I emailed them and got a response stating that they couldn’t find anything wrong so they “re-flashed” it. I reinstalled it, same problem, doesn’t start and the screen will go dead. I’m going to keep working on this Sniper to see if I missed anything.
      I’m seriously thinking of just going back to my Edelbrock carborater as I never had any problems with that for years. I do like the throttle response I got out of the EFI and efficiency WHEN IT WORKED!
      Anybody have any opinions on the Edelbrock Pro-Flo 4? Holley does offer a Sniper 2 conversion but I’m scepticle about going back to the same problems I’ve had with those.

    12. #12
      Join Date
      Nov 2006
      Location
      Mountain Springs, Texas
      Posts
      4,516
      Country Flag: United States
      Try the correct recommended PCV valve.
      1969 Camaro - LSA 6L90E AME sub/IRS
      1957 Buick Estate Wagon
      1959 El Camino - Ironworks frame
      1956 Cameo - full C5 suspension/drivetrain
      1959 Apache Fleetside

    13. #13
      Join Date
      Jan 2008
      Location
      Elk Grove, CA
      Posts
      217
      With all the frustration I’ve had with the Sniper I decided just to go back to my Edelbrock Carborator, at least for now. I think if you really want to go with EFI the best route is to go with a factory LS running gear as it was designed from engineers to work properly. Installing aftermarket EFI on a motor that never had it is just to complicated and full of bugs you have to constantly chase. Yes you can spend 2,000, 3,000, 4,000 and up on an aftermarket EFI system or buy a used factory LS motor with the ecm and harness and I hear it’s a 3 wire hookup. LS motors can produce much more hp and run so much smoother then the good old trusty SBC, doesn’t seem to get any better then that.

    14. #14
      Join Date
      Jul 2007
      Location
      nw phx
      Posts
      187
      Quote Originally Posted by elwaupo View Post
      Carborator, at least for now. .

      holley has the version 2 sniper now

      maybe holley will credit you and put that towards a new unit.

      at the shop we do about 10-20 sinper installs each year

      ha a few issues that needed replacements.

      But, no matter what, i do harp on the fact you cant beat factory efi. Proven for millions of miles.

      to properly prep a sbc for injection, you need more than a 'bolt on' injection system.
      ...life is too short, live for today, tomorrow isn't guaranteed

    15. #15
      Join Date
      Jan 2008
      Location
      Elk Grove, CA
      Posts
      217
      I wondered if Holley would credit me for an upgrade as Iíve sent the first one back and they sent this one as a replacement stating that this version was an upgraded one, nothing but problems and this newer one doesnít even work. Iíd consider going for the Sniper 2 but Iíd have to buy it at full price, thanks Holley!







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