Injector pump timing quick reference chart
11-29-2006, 07:17 AM
#1
Registered User
Thread Starter
Join Date: Jun 2005
Location: Pasadena, MD
Posts: 851
Likes: 0
Received 0 Likes
on
0 Posts
Injector pump timing quick reference chart
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.
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.
11-29-2006, 08:02 AM
#3
Registered User
Thread Starter
Join Date: Jun 2005
Location: Pasadena, MD
Posts: 851
Likes: 0
Received 0 Likes
on
0 Posts
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.
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.
11-29-2006, 03:50 PM
#5
Registered User
Thread Starter
Join Date: Jun 2005
Location: Pasadena, MD
Posts: 851
Likes: 0
Received 0 Likes
on
0 Posts
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
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
11-29-2006, 05:52 PM
#6
Registered User
11-30-2006, 11:09 AM
#7
Registered User
Thread Starter
Join Date: Jun 2005
Location: Pasadena, MD
Posts: 851
Likes: 0
Received 0 Likes
on
0 Posts
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.
Trending Topics
11-30-2006, 03:42 PM
#9
Registered User
Thread Starter
Join Date: Jun 2005
Location: Pasadena, MD
Posts: 851
Likes: 0
Received 0 Likes
on
0 Posts
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.
11-30-2006, 08:06 PM
#11
Registered User
Thread Starter
Join Date: Jun 2005
Location: Pasadena, MD
Posts: 851
Likes: 0
Received 0 Likes
on
0 Posts
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
My bad...misread ya! Ignore my last post
Thread
Thread Starter
Forum
Replies
Last Post
madhat
3rd Gen High Performance and Accessories (5.9L Only)
5
11-04-2009 07:30 PM
kokalit
3rd Gen Engine and Drivetrain -> 2003-2007
0
05-26-2008 12:12 AM