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Talking with Chris yesterday and he said there was no seat of the pants feeling when he changed to the two hole. Maybe just a little cleaner burn when on diesel fuel. Guess the amazing thing about the design is that it is able to run low cetane number fuels or things like gasoline and not cause...

Are the piston's the same in your tractors or are they a type of mulitfuel engines? I just can't see the four hole spray pattern working well with the pistons and intake we have. Would it run yes guess any amount of holes would run but not get the best burn / air ratio we need.

I cant get a good pic of the holes or measure without some gage pins. I would say yes the side hole looks a little bigger. I am sending the tips I just got back as it is clearly false advertising. Looks like the two hole tips are the best way to go with the multi fuel piston no matter what fuel...

Ok got the injectors tips from ebay and they are not the NBM770138 that are used in the multi fuel. They are NBM770055 and have four holes. I to wondered how they would work as they look to be the correct size. Since the design of the piston and spray pattern with the multi fuel 0138 was for...

https://www.bing.com/videos/search?q=utube+deuce+injector&qs=PF&cvid=c80957a15ff54507a4a8051428fbbb2f&cc=US&setlang=en-US&ru=%2fsearch%3fq%3dutube%2bdeuce%2binjector%26form%3dEDGEAR%26qs%3dPF%26cvid%3dc80957a15ff54507a4a8051428fbbb2f%26cc%3dUS%26setlang%3den-US&view=detail&mmscn=vwrc&mid=1D2AF9E8...

TM = Technical Manuals. There is some at the cover page of Steel Soldiers and some in the Deuce forum. I like the Trouble shooting the LDS-465-1 multifuel engine. Then there is the Tm 9-2910-226-34 here on the board.

If you have two hole injectors myself I would just have those cleaned / checked. If you need new tips # NBM771038 then search the jbay auction sight and pick up just the new tips and pins and have them set for 3200psi. I just ordered 6 tips / pins myself just to have.

I don't know how good those numbers will be as the printing was 1968 but I do have my numbers for the newer AMBAC injector tip. My two hole tip is marked Italy 12-91 and NBM770138.

Just for smitts and giggles I took my two hole AMBAC injector apart. Just have to watch the parts order and if you tip it upside down parts will fall out. First tip holder then tip. Then what I am calling the alinement disc and it goes in with the beveled edge facing the tip and locks in with...

Here is a pic with AMBAC numbers for my two hole injector. Would be interesting if the numbers match for the single hole you guys got just a tip change. Per the TM looks like the only difference would be how they are adjusted. One with shims the other with pressure adjusting screw. Only see two...

The engine was designed to be a multi fuel with a single hole injector but some where along the line they must have felt that the two hole was better. You could run the single hole and not notice any difference in performance or mileage. As for a better burn with the two hole I would not know...

I thought that also but all I could find in the TM's was about the calibration. One would think you would get better atomization with two holes and more fuel oil on the piston cup walls. Do what ever you think is right your truck.

Do believe it is more of a calibration thing per what pump you might have. I will stick with what comes out so if it has two holes I will replace with two holes as per TM.

Are they single hole or double. Might have to save your old two hole tips.