thanks. I am looking for a gt1749 or 1849, or a 1752 or 1852 turbo. I am also looking to see if a bigger pump cassette will fit as well. It is not easy to find the Kubota part #'s. I am looking at a v2403t pump, p/n 1J860-51010 or "51012, and the v2403t injector is a 16419-53900 I think those are correct, but it is like pulling teeth to get Kubota part #'s, and god forbid you ask for something not standard
I did buy a v2003t pump to learn from $40 on ebay as a non worker.
From popular opinion the DI motors don't need much pump work
It would be nice to see some pics on your measuring if you have them.

Have fun in school

 

are your turbos any bigger? and do you need a bigger pump to run a bigger turbo? I have a guy oout of California that I work with hes a Kubota dealer pretty good at finding me parts. im not sure if I need bigger injectors or a pump to run a bigger turbo. also I heard theres some kinda shim you can take out in these motors that makes them get a lot more fuel?

 

usedkubotaman is the tuner in this area. We should defer to him. Hopefully he might show up. As far as I know no Kubota swappers are running non standard pumps or injectors, modded pumps yes, but not different. Usedkuboataman has a pump mod he did which clocks the barrels in the IDI pump for more fuel. For the DI engine mods are to replace the governor spring with a stiffer one in the pump for more rpm, and then a basic turn up on the fuel adjustment screw. The only shims I know of are to time the pump
I don't know much about turbos either. just from your picture yours looks pretty big. the turbos I specd, I believe are doing double duty in both gassers and diesels. I am looking for a Turbo from a euro spec 2.2l diesel car, or the SAAB. There is another fellow running compound turbos and water meth.

 

ya im getting water and meth injection. working on swapping to bigger injectors. im building a lift pump setup similar to air dog. im going to get a bigger turbo and a bigger intercooler. im gunna break some new ground with these motors. been working on finding some headstuds. talked about port and polishing intake. all kinds of stuff. my plan is to push this motor to the max. I know that the v2403 and v2203 are almost identical except for crank as far as im concerned. but im not sure. that's why I do my business with the Kubota dealership in like florida. they specialize in building these motors for all kinds of industrial setups. they don't mod them but they have access to all kinds of stuff and they are very knowledgable about this motor. and I don't wanna run tiwns just a single. I don't think I have room to mess with twins. maybe I will though, im not really sure to be honest.

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Ok, on to the good stuff…



Most of the time, the 2203’s that I’ve seen swapped, come from Carrier refridgeration units. They seem to be the most prevelant, and easiest to find of the Kubota engines. My guess is this may be what your family member is dealing with… I’ll elaborate a little bit, just in case this is what’s in-fact happening.



The 2203’s are good engines, however, they have a habit of overheating when the cooling system isn’t up to par. Typically they’ll scuff pistons and lose compression in one or two of the middle cylinders. Additonally, the Carrier spec engines are unique for a couple reasons



1. Most of them are what’s called a ‘long stroke’ engine, where Kubota stuffs a V2403 crankshaft into the V2203 block. Remember the 4TNV86 for Thermo King? Same concept… it’s a hybrid that only Carrier receives.

2. They are low speed engines. Most of the Carrier engines are 1500 RPM spec units, which are electronically governed.





What this means to anyone looking to use a Carrier spec engine in another application is; these engines don’t really like high RPM (due to the long stroke), and they’re hard to govern due to being equipped for such low speed from Kubota. However, all is not lost, as I have heard of guys swapping governor parts, and getting more RPM out of the engine (for starters, one can simply take the heavy governor spring, give it a twist, and reinstall it), which will net more RPM.



I could elaborate more, but this would be a mile-long email…



Next, finding a direct injected (DI) V2203/V2403 is the holy grail of this line of Kubota engines. They are out there, but tough to find… Most of the DI engines are sold to OEM’s, which essentially dies with the respective machine its in. They don’t come up for sale very often…





What I would look for is this; a V2403 (for the extra displacement), and a small turbocharger to bolt on. The IDI engines can handle a few PSI of boost, and from what I’ve read, respond very well to turbocharging. I might also suggest removing a thin shim from under the injection pump to help with performance as well.





As for actually locating the engines to use… that will kind of be a crap-shoot. I would suggest maybe contacting a distributor for the area (look here for the nearest DB Kubota Engine America - US Engine ), but they will most likely want to sell you a new engine, and not tell you where to find good used engines. For that, I might suggest speaking with the local dealers who work on the engines every day, as they will have access to more used engines than the DB. Making friends with the local Carrier dealer would be an awesome start too.





this is an email I received from a guy that's pretty high up on the Kubota pole. We asked him where we can source many of these engines from because we are going to custom build trucks for people. This was his reply

 

sounds like you have your work cut out for you. keep us posted

 

will do!

 

Im just starting my swap. Putting a v2203 into a 1990 ranger. What are some opinions on what turbo to run? I see about everyone is running a different one and didnt know what ones seemed to be working the best for this motor.

 

Wyoranch is running the Rhf4 Ihi, same turbo as I am, hes having a lot of luck with it but im having some problems. I think im somehow restricting the flow and I also it has a base gasket leaking. Hopefully when I add a bigger air filter, add a much bigger intercooler, and some bigger piping and then fix that gasket of course, ill be ok! Itll be a few weeks before I get the chance to find out though!

 

Im trying to figure out how to make this accessory plate also. I really like what usedkubotaman did with his.

 

Ya it gives it a nice look and better organizes everything. its defiantly the way to go if you have the capabilities to make it. Id like to draw one up in auto desk inventor and have a 3D model of it that can be plugged into a mill or water jet. I have the skills to operate the program just gotta make a model to follow.