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  • Gary Hart's 1951 GMC Half Ton - now with Teaser video!

    1951 GMC Half Ton pickup, GM Turbohydramatic 400 trans, 69 Camaro rear end with 2.73:1 gears.
    Rotomaster HX35 turbo, air-to-air front mount intercooler, and a new aluminum radiator (so far).
    EFI is courtesy of 6 51 lb/hr injectors, Megasquirt-II ECU (possibly upgrading him to MS3 before First Start). Where it gets interesting is his 6 LS coilpacks for ignition, Ford EDIS trigger wheel mounted to the crank, and Ford VR pickup sensor.

    Gary has been moving fast on this build. I know he plans on driving it before painting it - the exterior is in decent shape! Ultimately, this will be used to pull a boat to the various lakes near his home in Southwest Missouri.

    We're aiming for some time in April to fire this beast up!! We will take video of that for sure.




    Here are some preliminary build pics, current as of Feb 2011:
























    Last edited by dieselgeek; July 13th, 2011, 07:40 PM.
    Proudly using www.DIYAutotune.com custom EFI components!

  • #2

    Re: Gary Hart's 1951 GMC Half Ton - now with Teaser video!

    Re: Gary Hart's 1951 GMC Half Ton

    neato!

    The wheels/tires sure look familiar :P
    My fabulous web page

    "If it don't go, chrome it!" --Stroker McGurk

    Comment


    • #3

      Re: Gary Hart's 1951 GMC Half Ton - now with Teaser video!

      Re: Gary Hart's 1951 GMC Half Ton

      Flat ass bitchin!!!

      Comment


      • #4

        Re: Gary Hart's 1951 GMC Half Ton - now with Teaser video!

        Re: Gary Hart's 1951 GMC Half Ton

        Nothing but red Xs.

        Sounds way cool.

        Too bad he has the same name as that goof that ran for president several years ago.
        There's always something new to learn.

        Comment


        • #5

          Re: Gary Hart's 1951 GMC Half Ton - now with Teaser video!

          Re: Gary Hart's 1951 GMC Half Ton

          Nothing but red Xs.
          Your work must be blocking "1320video.com" Sucks! sorry.
          Proudly using www.DIYAutotune.com custom EFI components!

          Comment


          • #6

            Re: Gary Hart's 1951 GMC Half Ton - now with Teaser video!

            Re: Gary Hart's 1951 GMC Half Ton

            Squirrel, you gotta good eye, those wheels and tires were used to go 248 MPH in my salt flat Studebaker back in 2009. The #787 Stude still holds the current record @ 240.9 MPH.

            Comment


            • #7

              Re: Gary Hart's 1951 GMC Half Ton - now with Teaser video!

              Re: Gary Hart's 1951 GMC Half Ton

              Hi Gary! good to hear from you

              My fabulous web page

              "If it don't go, chrome it!" --Stroker McGurk

              Comment


              • #8

                Re: Gary Hart's 1951 GMC Half Ton - now with Teaser video!

                Re: Gary Hart's 1951 GMC Half Ton

                Hi Gary. Dan Stokes here - (from Impound). Are you going to take the truck down the salt? That would be cool for sure. No clue on the class. I'll be back in Impound this year and hopefully from now on.

                Dan

                Comment


                • #9

                  Re: Gary Hart's 1951 GMC Half Ton - now with Teaser video!

                  Re: Gary Hart's 1951 GMC Half Ton

                  This is a cool project. I am lookin forward to more updates.

                  Comment


                  • #10

                    Re: Gary Hart's 1951 GMC Half Ton - now with Teaser video!

                    Re: Gary Hart's 1951 GMC Half Ton

                    Gary's rides are always cool
                    terry

                    Comment


                    • #11

                      Re: Gary Hart's 1951 GMC Half Ton - now with Teaser video!

                      Re: Gary Hart's 1951 GMC Half Ton

                      Hey Gary! I'm interested in seeing more of that intake manifold setup you got there! I like the style, I'm thinking of going downwards with the exhaust and upwards with the intake on mine (and be no where near as beautiful as yours!).

                      Welcome to Bangshift!
                      Escaped on a technicality.

                      Comment


                      • #12

                        Re: Gary Hart's 1951 GMC Half Ton - now with Teaser video!

                        Re: Gary Hart's 1951 GMC Half Ton

                        Awesome!
                        1967 Chevelle 300 2 Door Post. No factory options. 250 ci inline six with lump-ported head, big valves, Offy intake and 500cfm Edelbrock carb.

                        Comment


                        • #13

                          Re: Gary Hart's 1951 GMC Half Ton - now with Teaser video!

                          Re: Gary Hart's 1951 GMC Half Ton

                          Wow! I love following along on project like this where there is a lot of custom made parts and just not a "catalog" build picking already match parts for a final build. One question about the EFI. How do you handle the injectors and firing them with just 3 intake ports. Are you planning to run 3 injectors doing double duty? Love the engine turned plate that the coil packs are mounted on.
                          Tom
                          Overdrive is overrated


                          Comment


                          • #14

                            Re: Gary Hart's 1951 GMC Half Ton - now with Teaser video!

                            Re: Gary Hart's 1951 GMC Half Ton

                            One question about the EFI. How do you handle the injectors and firing them with just 3 intake ports. Are you planning to run 3 injectors doing double duty? Love the engine turned plate that the coil packs are mounted on.
                            great question. Shared intake ports and port EFI can be a huge pain in the butt. He's running six injectors, which will be fired in groups of three (2 banks of injectors). If distribution becomes a problem, we'll fire them sequentially (using the MS3x CPU upgrade), timing the injector opening with the corresponding intake valve opening. Upgrading from his MS2 to MS3x is a few extra bucks and hour or two of wiring. We'd need a cam speed sensor, which is easy to do inside the old distributor with a pertronix module, or even points.

                            For starters, we're going to see how it does on bank fire injection first. With the injectors a little bit upstream, I don't expect us to need the sequential.
                            Proudly using www.DIYAutotune.com custom EFI components!

                            Comment


                            • #15

                              Re: Gary Hart's 1951 GMC Half Ton - now with Teaser video!

                              Re: Gary Hart's 1951 GMC Half Ton

                              On the inliners forum, a gut there with an EFI'd turbo chevy 250 ran into issues with afr's and fuel distribution with the shared ports (lump ports). He went to an individual runner head and it cleaned it up. I wonder how the sequential will work with the shared ports.
                              Escaped on a technicality.

                              Comment


                              • #16

                                Re: Gary Hart's 1951 GMC Half Ton - now with Teaser video!

                                Re: Gary Hart's 1951 GMC Half Ton

                                On the inliners forum, a gut there with an EFI'd turbo chevy 250 ran into issues with afr's and fuel distribution with the shared ports (lump ports). He went to an individual runner head and it cleaned it up. I wonder how the sequential will work with the shared ports.
                                It's said that sequential injection is the only proper way to do shared port EFI. That's how the guys with the Salt Cat did it on their shared port XXO engine (inline 8 buick like Dr. Mike's) and they had a lot fewer problems than we had on the #1950 Buick, same engine.

                                The idea is to inject the fuel in the column of air that's headed for a specific cylinder, and not to overlap them. The salt cat guys said it was super easy to set up and gave them no problems at all. Versus what we went through on the #1950 - different sized injectors, 12 of them? spraying all over trying to optimize distribution, which was only good at WOT. We'd have put ms3x on the buick if it had been available at the time, I think. May still try that in the future.
                                Proudly using www.DIYAutotune.com custom EFI components!

                                Comment


                                • #17

                                  Re: Gary Hart's 1951 GMC Half Ton - now with Teaser video!

                                  Re: Gary Hart's 1951 GMC Half Ton

                                  One question about the EFI. How do you handle the injectors and firing them with just 3 intake ports. Are you planning to run 3 injectors doing double duty? Love the engine turned plate that the coil packs are mounted on.
                                  great question. Shared intake ports and port EFI can be a huge pain in the butt. He's running six injectors, which will be fired in groups of three (2 banks of injectors). If distribution becomes a problem, we'll fire them sequentially (using the MS3x CPU upgrade), timing the injector opening with the corresponding intake valve opening. Upgrading from his MS2 to MS3x is a few extra bucks and hour or two of wiring. We'd need a cam speed sensor, which is easy to do inside the old distributor with a pertronix module, or even points.

                                  For starters, we're going to see how it does on bank fire injection first. With the injectors a little bit upstream, I don't expect us to need the sequential.

                                  I was going to ask if you were going to run 6 injectors but I thought there wouldn't be enough room. I find this a real inrtersting post. So what's up with the 50 Buick? Any progress you can post on that?
                                  Tom
                                  Overdrive is overrated


                                  Comment


                                  • #18

                                    Re: Gary Hart's 1951 GMC Half Ton - now with Teaser video!

                                    Re: Gary Hart's 1951 GMC Half Ton

                                    Scott - I'll demonstrate my ignorance and ask the Dumb Guy question - Why not TBI? Is fuel distribution the issue? Seems like with that log manifold that the mixture would be pretty homogenous, especially under pressure. Maybe not - I don't know. That's why we have you in the world.

                                    So, what's the pros and cons?

                                    Dan

                                    Comment


                                    • #19

                                      Re: Gary Hart's 1951 GMC Half Ton - now with Teaser video!

                                      Re: Gary Hart's 1951 GMC Half Ton

                                      Scott - I'll demonstrate my ignorance and ask the Dumb Guy question - Why not TBI? Is fuel distribution the issue? Seems like with that log manifold that the mixture would be pretty homogenous, especially under pressure. Maybe not - I don't know. That's why we have you in the world.

                                      So, what's the pros and cons?

                                      Dan
                                      We considered that, but using anybody's OEM TBI unit would probably not meet the fuel demands of the turbo setup. (Some will argue this, I know). Anyways, injecting upstream similar to what they did on the Spectre Maverick *IS* a good way to do it IMO. just not using an OEM TBI, but still adding the fuel well upstream and running a wet manifold.

                                      It may end up that way, who knows. Gary welded stainless for a living - he can fab this stuff up in his sleep. He uses one of those old school scratch-start welders too. Very cool.
                                      Proudly using www.DIYAutotune.com custom EFI components!

                                      Comment


                                      • #20

                                        Re: Gary Hart's 1951 GMC Half Ton - now with Teaser video!

                                        Re: Gary Hart's 1951 GMC Half Ton

                                        Scott, you mentioned a LSR 50 Buick... out of complete and idle curiosity, do you know Les Liggett?
                                        It only takes one aweshit to erase a dozen attaboys

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