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  • #1

    advice on engine rebuild

    the engine in my truck died yesterday, it seems that it's overdue for a rebuild. i was planning on adding some fuel saving devices to it, but now that it needs rebuilt i can start from scratch and try to engineer the thing for maximum efficiency. the question i have is what kind of modifications should i do to get the most i can out of the engine. the engine in question is a 4.3L 262ci in a 91 gmc c1500. i want to keep it reasonable as much as possible. i've found rebuild kits for $250 incl heads, before i commit to a certain kit i want to know exactly what parts to put on my list. any help would be appreciated.

    thanks in advance
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  • #2
    If you have money to burn check out the HHO link here - they do a $2600 system for engines up to 6-litres. He talks about 2-3 times fuel-efficiency, which if borne out and you make your living on the road, would pay for itself relatively quickly. Snazzy-looking kit, if nothing else.

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    • #3
      Engine Mods

      It depends on a number of factors? which systems or types of systems are you thinking of using.

      HHO: to what extent? Full water burn, you may want to teflon or ceramic coat a few things as well as an exsaust gas heat exchanger/condenser/re-circulation of some sort. You may want to add a dedicated alternator for your system?

      Geet: Lots of exsaust and intake mods

      Evaporative fuel/Carb: (Pouge) Again intake and maybe exsaust mods

      You said it's a 91, Don't forget your computer, it probably won't like most of the changes and some convincing with a soldering pencil or replacement with a programable after market maybe in order

      Good Luck and keep us posted

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      • #4
        The Pogue carburetor seems to be more myth than reality. Granted, there is a patent for it, but for something that supposedly was fitted to tanks during WWII by the allies, (also supposedly labeled as a 'non-servicable' part) there is zero evidence that it performed as the urban-legend insists. At least one guy tried & failed at a replication - not a shoddy replication-attempt either - and even Pogue himself refused to comment on its performance when tracked down and questioned about it when in a nursing-home.

        There was much more evidence for the Fish carburetor's performance, but that came nowhere close to achieving what the Pogue carburetor promised.

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        • #5
          Petrol engines need control over the timing of the spark. It will need to be advanced if you use a substantial amount of HHO.

          Another firm worth investigating is said to be connected with Bob Boyce, namely, Hydrogen Garage:

          https://hydrogengarage.com/home.html
          .

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          • #6
            Maybe-maybe not

            Sprocket: As far as Pouge go's I don't have a one way or another, yet in 1980 I built an evaporative carb based on the principals he used (supposedly), it was fitted to a Pontiac 400 ci firebird and it worked (kinda) testing got us in the 90+mpg range with a pile of glitches and problems that I never got to remedy due to shipped out to new duty station far far away.
            There is a huge amount of energy in hydrocarbon fuels, most of which is wasted and thrown out the tailpipe.
            I never went back to tinkering with the evaporative carb preferring to work in HHO and other types of alternatives as well as dealing with life's little curve balls.

            Problems: no acceleration, had to gradually come up to speed. Fuel build up in system, fire, fuel distribution on surface medium.

            Might be worth revisiting, in a different thread.
            Last edited by Tarkus; 04-30-2014, 10:20 PM.

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            • #7
              Originally posted by Tarkus View Post
              Sprocket: As far as Pouge go's I don't have a one way or another, yet in 1980 I built an evaporative carb based on the principals he used (supposedly), it was fitted to a Pontiac 400 ci firebird and it worked (kinda) testing got us in the 90+mpg range with a pile of glitches and problems that I never got to remedy due to shipped out to new duty station far far away.
              There is a huge amount of energy in hydrocarbon fuels, most of which is wasted and thrown out the tailpipe.
              I never went back to tinkering with the evaporative carb preferring to work in HHO and other types of alternatives as well as dealing with life's little curve balls.

              Problems: no acceleration, had to gradually come up to speed. Fuel build up in system, fire, fuel distribution on surface medium.

              Might be worth revisiting, in a different thread.
              Really interesting that you managed to get that high a mileage - much higher than even the Fish carb if memory serves. There are quite a few Youtube videos of engines running, but just sitting in the driveway for the most part. I don't doubt that the evaporation thing works - got a small engine running that way myself once - just don't see it as practical unless someone surprises us and starts selling evaporative carbs again. Manufacturers are kinda thin on the ground at the moment!

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              • #8
                Vaporized fuel systems

                Sprocket: Evaporative carbs I believe have their limits, although the
                Geet system reminds me of some of the designs we played with in early 80's.
                There are some other ideas I have on using the. Will start a new thread in renewable energy to discuss.
                see you there.

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