S-10 Kubota Diesel Conversion
#152
Pumping principle
Last edited by usedkubotaman; 01-20-2013 at 07:44 PM.
#153
Thanks for the link. Here is one that helped me quite a bit with the theory.
" transportation.centennialcollege.ca/.../inline.pdf " Not sure if the link will work as it is a pdf.
So you moved the barrels. I guess to raise them? or twist them away from idle? to increase stroke before the spill port opens?
My question is did you notice any negative effects at idle or engine shutdown?
I have never done any pump work or mods. I need to wait until I get a spare pump. I am cuious if all the internals are as interconnected as reported? More fuel at the top end= less fuel at the bottom end?
I would have originally thought you would have re-indexed the junction where the rack and the plunger meet, to give ( i don't know ) more or less twist?
This is very interesting. How did you figure it out to move the barrels. Is this posted somewhere on a different thread?
" transportation.centennialcollege.ca/.../inline.pdf " Not sure if the link will work as it is a pdf.
So you moved the barrels. I guess to raise them? or twist them away from idle? to increase stroke before the spill port opens?
My question is did you notice any negative effects at idle or engine shutdown?
I have never done any pump work or mods. I need to wait until I get a spare pump. I am cuious if all the internals are as interconnected as reported? More fuel at the top end= less fuel at the bottom end?
I would have originally thought you would have re-indexed the junction where the rack and the plunger meet, to give ( i don't know ) more or less twist?
This is very interesting. How did you figure it out to move the barrels. Is this posted somewhere on a different thread?
#154
Thanks for the link. Here is one that helped me quite a bit with the theory.
" transportation.centennialcollege.ca/.../inline.pdf " Not sure if the link will work as it is a pdf.
So you moved the barrels. I guess to raise them? or twist them away from idle? to increase stroke before the spill port opens?
My question is did you notice any negative effects at idle or engine shutdown?
I have never done any pump work or mods. I need to wait until I get a spare pump. I am cuious if all the internals are as interconnected as reported? More fuel at the top end= less fuel at the bottom end?
I would have originally thought you would have re-indexed the junction where the rack and the plunger meet, to give ( i don't know ) more or less twist?
This is very interesting. How did you figure it out to move the barrels. Is this posted somewhere on a different thread?
" transportation.centennialcollege.ca/.../inline.pdf " Not sure if the link will work as it is a pdf.
So you moved the barrels. I guess to raise them? or twist them away from idle? to increase stroke before the spill port opens?
My question is did you notice any negative effects at idle or engine shutdown?
I have never done any pump work or mods. I need to wait until I get a spare pump. I am cuious if all the internals are as interconnected as reported? More fuel at the top end= less fuel at the bottom end?
I would have originally thought you would have re-indexed the junction where the rack and the plunger meet, to give ( i don't know ) more or less twist?
This is very interesting. How did you figure it out to move the barrels. Is this posted somewhere on a different thread?
#155
#156
I have also been conversing about this in a a mercedes diesel forum. the consensus for the inline bosch pumps on the OM617 benz is that clocking/turning the barrels will give a good amount more fuel, but getting the clocking correct so that all cylinders receive the same amount more fuel, is extremely difficult to do with out a pump test bench.
The procedure on the bosch pump seems very simple to do, but very difficult to get correct. I still want to see what is involved to do the mod on the Kubota.
Usedkubotaman, do you have any more details or pictures about what was involved for you?
The procedure on the bosch pump seems very simple to do, but very difficult to get correct. I still want to see what is involved to do the mod on the Kubota.
Usedkubotaman, do you have any more details or pictures about what was involved for you?
#158
#159
Thanks. I'm planning on using a 4spd muncie behind mine, and Greg at Overland Diesels is working on a Chevy adapter, but not sure what I'll end up doing. Just finished reading all the build threads I could find and learned a lot from what other people have done. For a low-budget adapter, think it'd be hard to beat milling the Kubota flywheel housing down and then making a steel adapter plate like Kubotaman has done. Super-simple. But I'm a product designer and do a lot of CAD work, so it's tempting to have a nice billet adapter made that would bolt right to the back of the block.