I Finally Did It.....EFI

Fuel and Air Systems

  1. 440 Charger

    440 Charger FBBO Gold Member FBBO Gold Member

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    I would bet not.
     
  2. 70B

    70B Well-Known Member

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    I see what you're saying,... I'll keep that in mind when I try it, then I guess it's back to the water pump drill and tap if it doesn't work. My thinking is the pee hole will let enough through but I guess you're saying not quick enough for the sensor? I'm installing a Holley Sniper.
     
  3. PRHeads

    PRHeads Well-Known Member

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    Nothing to add...... I just wanted to comment that this is a nice informative thread!!:thumbsup:
     
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    • threewood

      threewood FBBO Gold Member FBBO Gold Member

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      Here is a fuel graph after adding learn table and some smoothing.
      20210127_105726.jpg
       
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      • XCELLR8

        XCELLR8 Well-Known Member

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        I would also like to add that this has been a very informative discussion. :thumbsup:

        My question is what intake are you running on your engine?
         
      • rmchrgr

        rmchrgr Well-Known Member

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        I have not gotten as far as adding a user-generated learn table to my tune so I have a question - what is the 37.482% value at the top? If that's the amount of change from the original config, that seems like A LOT for any data point. If not, then do you know what that number signifies?
         
      • andyf

        andyf Well-Known Member

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        That is a VE number. That data point is for 500 rpm and 20 kpa which is a point on the map that is impossible to reach.
         
      • moparedtn

        moparedtn Ed on the Ridge FBBO Gold Member

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        I see you in the reflection on the monitor there!
        powerwindows-cover-s.jpg
        :lol:
         
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        • rmchrgr

          rmchrgr Well-Known Member

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          Ah I see it now down at the bottom left, thanks.
           
        • threewood

          threewood FBBO Gold Member FBBO Gold Member

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          Holley Street Dominator single plane.
           
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          • threewood

            threewood FBBO Gold Member FBBO Gold Member

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            My aluminum water pump housing has two threaded temp sensor holes. A small one 1/8 npt and a larger one 1/2 npt (needs a brass reducer as 1/2 is way too large for the Sniper sensor).
             
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            • TomH

              TomH Member

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            • TomH

              TomH Member

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              New here trying to do a Sniper on my 67 Coronet.
              Got questions. 1, Where is best source for key on and crank 12v?
              2, Where is best to mount the Walbro inline pump?
              Not much room
              What works? Pictures appreciated.
              I'm really bad using the site here. Help
              Wthibb@gmail.com

              Thanks
              TomH
               
            • andyf

              andyf Well-Known Member

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              There is no source for key on and crank 12 volts in a Mopar, you have to build it yourself. How you build it depends on how skillful you are. I prefer to start with a reproduction engine wiring harness which I take apart and redo. I eliminate the ballast resistor from the harness and tie IGN 1 and IGN 2 together to power the Sniper.

              As for your second question, I'd recommend putting the pump inside the tank. You can buy a tank from Holley for your Coronet: https://www.holley.com/products/fuel_systems/fuel_injection/sniper_efi/fuel_tanks/parts/19-183
               
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              • threewood

                threewood FBBO Gold Member FBBO Gold Member

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                3 month update....

                Everything is running great. No issues. I played with smoothing the fuel tables and haven't had any negative effects. AN fittings are still tight. I've been driving it to work for the past month and a half. Gotta get my drive time before we get +100 temps.
                 
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                • 66chargerpat

                  66chargerpat FBBO Gold Member FBBO Gold Member

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                  :thumbsup::drinks:
                   
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                  • andyf

                    andyf Well-Known Member

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                    What does the learn table look like? You want the learn table to be all small numbers, everything should be less than 10. If everything is less than 10 then the system is dialed in pretty well and you can reduce the learn percentages. If not, then transfer learn to base and keep driving it until all numbers are less than 10.

                    Once you get a tune that is working great for you then you can save that tune under another name as a backup. I sometimes turn off closed loop operation for the back up tune so if you get stuck somewhere with a bad O2 sensor you can plug in the back up tune and drive home without the O2 sensor. Having a back up tune in your ECU can save you a tow bill or a long walk home.
                     
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                    • threewood

                      threewood FBBO Gold Member FBBO Gold Member

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                      Thanks Andy. The numbers looked fairly small for the most part. I'll have to pull it back up and double check though. I'll save it too.
                       
                    • That_Tall_Dude

                      That_Tall_Dude FBBO Gold Member FBBO Gold Member

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                      Sweet!

                      Now that you some time with it, how do you like it compared to the carb

                      Understand this isn’t a fair comparison to carbs in general cuz the carb wasn’t happy

                      Mostly in interested in perks/convenience like reduced warm up time, mpg(?), drivability, and if you have some or foresee trade-offs

                      (Hi all, I know “nobody gets these for MPGs”, but if it extends range per tank significantly that’s a nice perk to most; only takes a few mpg improvement)


                      A buddy wants to do it with his Camaro


                      Thanks!

                      And congrats again for knocking this thing out
                       
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                      • threewood

                        threewood FBBO Gold Member FBBO Gold Member

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                        Cold starts are simple. Key on until the handheld loads (2-3sec) then one crank and it fires. The cold idle is fantastic, you can go immediately without nursing the throttle.

                        Driving is smooth, throttle instantaneous. Good idle manners. Ease of tuning is a great feature.

                        Only trade off I can think of is the price vs. carb. With efi there is little to no fuel smell, better tuning and more precise. Pressurized fuel system = no evaporation from system.
                         
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