Potential power increase for CK2610?

Billrog · Feb 25, 2022

Jim I don't know how that works and he explained it real well to me but I leave injection pumps to experts because explaining it doesn't mean i know anything about them.
My machine started in colder than -20 C this winter many times within a couple cranks of the engine. Black smoke and rattling and banging for a couple mins. then all is well. After 15- 20 min. warm up I plowed snow.

Trippy1313 · Feb 26, 2022

Yeah interesting. I'm curious if they changed ignition timing too???

I was reading and now understand that shims before or after the fuel pressure pump can advance or ****** fuel injection timing....

But did they only remove shims to advance the fuel timing, or did they also do something to change the ignition timing???

I'm certain likely they didn't mess with the valve timing.

the old grind · Feb 26, 2022

Pump timing vs ignition timing and likely only a very few degrees. Valve events may be different for turbo versions than for NA with the same block. LD1 found out about that with his Kubota. IIRC 'The Fred' (?) didn't need that when he added one.

Billrog · Feb 26, 2022

No valve timing was mentioned. Removing shims and I don't recall mentioning timing. He very well could have as I was interuped when he was telling me. He takes for granted I know more than I do because he's been in my shop and knows I've removed and replaced pumps and adjusted govenors. There's mechanics here I'm sure would understand the processes.

jimglassford · Feb 26, 2022

The CK2610 uses the old inline pump that bolts to the block. There is a fuel cam shaft that actuates each individual fuel injector. The shims go between the pump and the block. There is no in front of or behind. This has nothing to do with the valves in the head. The fuel injection timing is the only thing controlled by the shims. The shims come in different thicknesses. If you remove 0.15 mm of shim/shims, you will advance the injection timing by 1.5 degrees. If you insert 0.15 mm of shims, you ****** the injection timing. The injection event is at 12 degrees before top dead center. The pressure, heat and injection timing dictate ignition. There is no ignition timing like a gasoline engine. In a diesel, the only thing that is controlled is the amount of fuel injected.

The one thing I do not know for sure is if by advancing the timing, (removing shims), do you also extend the injection event.

thepumpguysc · Feb 27, 2022

Keep a GOOD EYE on the temperature gauge..
Extending the burn time (advancing the timing) creates more heat..
and we all know these little engines can not take the heat..
Glad ur happy with the results.. Me personally, would have went with the rack screw..

jimglassford · Feb 27, 2022

So I did some research on the internet with interesting results. And the general consensus is that advancing the timing on a mechanical injection pump will increase the power output. I remember my father adjusting the timing on the old point type gasoline engine where he would advance the spark until the engine would ping then back it off a little. That was if he did not have a timing light.

I may try the same thing on my DK55. I do not need more power but from what I read, as diesels rack up the hours, the timing can get retarded. This could lead to hard starting, smoking at startup and lower performance. The hard starting and smoking on startup are two issues I have been fighting. However, I will not randomly remove shims. I have a few different thickness shims and I will play with the spacing. On the older DK55s the timing mark is on the balancer versus the flywheel so the mark is not as exact.

Billrog · Feb 27, 2022

The dial on the temp. gage on mine has never even reached the midway point at 40 C last summer . The cooling system is excellent.

LevesqueOnline · Mar 15, 2022

Wanted to share some more videos I found on facebook from people who did this.

https://www.facebook.com/video.php?v=3288491047869515

also some posts on the kioti facebook tuning group around this, seems everyone is just turning the screw a turn or 2 and mention it is immediately noticeable especially on hills.