MarekK2491 Posted September 17, 2021 Share Posted September 17, 2021 I’ve seen some discussions on turning up these pumps. I have a late 82/83 s1900 dump truck. Power is lacking and was wondering what I can do to get another 75hp or so out of it or more if safe... A few questions... I’ve seen talk of adjusting the pump but not a specific picture or diagram of what’s what. Does anyone have a detailed guide on how to do this? A turbo swap may be in the cards if temps soar which is fine but I haven’t seen what a safe amount of boost is on these models. I’ve read different model dt466 have different pistons. How much boost can we run on 100 percent factory engine? What is a direct bolt up turbo that will keep this cool under load? I would prefer not to deal with an intercooler unless absolutely necessary. Is egts the main concern or should I be concerned about the engine handling additional power even if kept cool? Maybe that’s unrealistic loaded without an intercooler. Link to comment Share on other sites More sharing options...
MinnesotaFarmall Posted September 18, 2021 Share Posted September 18, 2021 Egts are a concern when turning up a motor. I would strongly suggest one if possible to put in. Does yours have an annoroid valve on it? It will have a line coming from the intake to the top of the injection pump. If so I've never been in one before and therefore I would be of no use. The easiest way if it doesn't have an Android valve is to take the top rectangular cover off the top of the injection pump and in the left top side in the center is the excess fuel screw. Out is more fuel, in is less fuel. One turn is approx ten HP. I would really really really, did I say really enough yet? recommend an egt and boost gauge. These old engines can handle about thirty pounds of boost reliably if used as a daily, but it is starting to get out of the efficiency map of the turbo. A cheap, and usually direct bolt on turbo is the 3Lm 466. The engine itself will handle about 400hp reliably with little to no upgrades. Boost about thirty pounds and I would recommend a different head gasket or studs with a stock gasket. Link to comment Share on other sites More sharing options...
MarekK2491 Posted September 18, 2021 Author Share Posted September 18, 2021 Yes egt gauge is ordered. I will order a boost gauge now. I will post a picture of the pump a little later today. Link to comment Share on other sites More sharing options...
R190 Posted September 18, 2021 Share Posted September 18, 2021 17 hours ago, MinnesotaFarmall said: Egts are a concern when turning up a motor. I would strongly suggest one if possible to put in. Does yours have an annoroid valve on it? It will have a line coming from the intake to the top of the injection pump. If so I've never been in one before and therefore I would be of no use. The easiest way if it doesn't have an Android valve is to take the top rectangular cover off the top of the injection pump and in the left top side in the center is the excess fuel screw. Out is more fuel, in is less fuel. One turn is approx ten HP. I would really really really, did I say really enough yet? recommend an egt and boost gauge. These old engines can handle about thirty pounds of boost reliably if used as a daily, but it is starting to get out of the efficiency map of the turbo. A cheap, and usually direct bolt on turbo is the 3Lm 466. The engine itself will handle about 400hp reliably with little to no upgrades. Boost about thirty pounds and I would recommend a different head gasket or studs with a stock gasket. But an 82/83 truck would have an inline pump which is totally different Link to comment Share on other sites More sharing options...
MinnesotaFarmall Posted September 19, 2021 Share Posted September 19, 2021 Didn't know that, but says ambac 100?? Link to comment Share on other sites More sharing options...
RyanF Posted September 19, 2021 Share Posted September 19, 2021 17 hours ago, R190 said: But an 82/83 truck would have an inline pump which is totally different No, it could still have an Ambac pump. I had an engine from a truck with one. Different governor from an ag engine, and electric solenoid for shutoff. Link to comment Share on other sites More sharing options...
MarekK2491 Posted September 20, 2021 Author Share Posted September 20, 2021 I’ll send pic today. The inline pump started the next year model I believe Link to comment Share on other sites More sharing options...
MarekK2491 Posted September 20, 2021 Author Share Posted September 20, 2021 This is what’s on the truck now. Need to see about what screws to adjust under the plate. Link to comment Share on other sites More sharing options...
striker782 Posted September 21, 2021 Share Posted September 21, 2021 Need to replace the hydraulic hose from final filter to pump inlet. OEM hose is much softer and will dampen pulsations from gear pump. Hydraulic hose will cause loss of horsepower Link to comment Share on other sites More sharing options...
MinnesotaFarmall Posted September 22, 2021 Share Posted September 22, 2021 It has an Android valve on it, so I don't exactly know how that whole system works under the rectangular cover. Link to comment Share on other sites More sharing options...
Injpumped Posted September 22, 2021 Share Posted September 22, 2021 everything is still the same as a tractor fuel stop, except there is a second sliding piston that moves the main one back and forth. So the aneroid pushes the whole thing to a normal position once it gets about 10 psi of boost. If it doesn't get boost to it or has a blown diaphragm it will be in the "no boost" fuel condition and be a big dog! Turn it up same as a tractor. The aneroid no air will change with it to some extent, but the rate is not adjustable. Confused yet? Link to comment Share on other sites More sharing options...
MarekK2491 Posted September 22, 2021 Author Share Posted September 22, 2021 Is oem hose regular heater hose? how do we turn up the pump I really have no idea what I’m looking at and have searched for a picture or diagram Link to comment Share on other sites More sharing options...
MarekK2491 Posted September 22, 2021 Author Share Posted September 22, 2021 Do you think hydraulic hose will cause loss in power? Link to comment Share on other sites More sharing options...
striker782 Posted September 22, 2021 Share Posted September 22, 2021 Yes the hydraulic hose will cause horsepower loss. I had a customer’s 986 that I dynoed with a hydraulic hose then put on the OEM hose. It gained 15 horsepower just changing to the correct hose. Do not use heater hose. Just put on the correct one. Link to comment Share on other sites More sharing options...
MarekK2491 Posted September 22, 2021 Author Share Posted September 22, 2021 Appreciate that insight. Strange. Will go try and track one down. The local dealer seemed shocked that I inquired about parts for something this old Link to comment Share on other sites More sharing options...
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