timing cp3 engines

[Nootch]

Don't know how if this exactly applies to this forum, but i'll give it a whirl.

I was recently on a product training course with CAT and their CR based engines all have timed pumps. Specifically timed that the top of the compression stroke of the pump lines up with an injection event. The theory being if you time it properly, you can make a small pump act like a big one.

Question being, on the CP3 engines does the pump line up in gear selection so you can effectively time them to match compression with injection? Has anyone toyed with this concept and timed multiple pumps to maximize everything they can?

 

[JL Builders]

I've never timed any of my pumps. Even on my triple cp3 setup. They run at different speeds.

 

[TheBigNasty]

What happens when the injection timing changes?

 

[Nootch]

I don't think CAT times it that precise, but more of within the range of timing. the idea being the pump at or near top of the compression stroke when the injector would be desiring fuel. In theory, i can see the advantages of that.

 

[Howling]

It was brought up in the past on CF http://www.cumminsforum.com/forum/3rd-gen-powertrain/23399-cp3-timing-results.html