I love Excel, so I whipped up this chart quick off the chart posted at Piers Diesel, basically just added an inches column, with the conversion formula.

I know you can convert mm to in by using the multiplication factor, figured some of you might just want a quick-ref chart.

I'll probably redo this again when I'm home so that I can do it with Photoshop instead of MS paint, and keep the borders. Anyways. Let me know if I screwed anything up or missed anything or if something could be made better.

 

how bout running the chart up to say 20° or so....looks good so far though!

 

I don't have those numbers, but if someone wants to provide them I'd be more than happy to add them. It looks fairly linear, I think I'll graph it so I can get a visual on it...

OK I graphed it, it's a pretty straight line. Looks about .003"-.004" per 1/2 degree of timing.

What's weird though it's not truly linear. Look at the 215HP pump for example, the mm column. It's adding .1, then .09 for the next few, then adds .1 again, then it's another .15 from 15.5 to Pier's estimated 16*...

On the 180 pump, it's in .08 mm increments from 12.5* to 14.5*, then jumps to .1mm inrements...any ideas? Timing is timing, a degree is a degree. My assumption is the lobe of the injector pump cams. My brain isn't working this early, but it's getting either steeper or flatter, requiring more cam lift to equal the same amount of engine degrees. I'm pretty sure the answer is steeper...I don't know.

 

on piers chart for the 215 it appears linear, starts at 11.5° which is 4.0mm of lift, and goes up to 16° which is 4.9 mm of lift.

 

Mostly linear, but a little weird in a couple spots?

For example, here is the inches increase per half-degree starting at 11* going up to 16* for the CPL 1968...

0
0.002
0.004
0.002
0.003
0.003
0.003
0.003
0.007
0.004
0.004

 

Here was my stab at it...

https://www.dieseltruckresource.com/...d.php?t=119848

 

Oh cool! I guess nobody's come up with a definite answer yet? I know it has something to do with the cam lobes within the pump...but I haven't found an answer through any searching yet.

 

it absolutely has to do with the cam lobe profile... x* of crank rotation = y" of plunger lift... it's not going to be linear as the cam lobes aren't triangular

 

It doesn't? I'm confused now...I figured the degrees of rotation vs. inches of lift had to do with the lobe on the cam in the pump? Steeper on the sides and flatter up top? I've never seen the cam so I don't know. What causes it not to be linear if it's not irregular? I'm confused.

 

a cam lobe has is not triangular... it's got a parabolic curve coming from the base and at the peak... so it's not going to be a linear deal...

 

OK I read you wrong...you said it absolutely has to do with the cam lobe....I read fast and thought it said "has absolutely nothing to do" with it.

My bad...misread ya! Ignore my last post

 

So, does anyone have the values in mm for a 215 pump above 16 degrees? I just shot for 17 degrees and used 5.8 mm as a measurement.