Time For Timing

[Old Smoky]

I am advancing my pump timing within the next few days and am using a timing tool that reads in degrees, not mm. I would like to be in the 1. 4-1. 5mm range. Is this the same as 15 degrees?



Mike

 

[Power Wagon]

Out of couriosity, what tool is that? Timing is measured with plunger travel in the head, and that's what specs are given.



You have a dial indicator marked off in degrees?

 

[Old Smoky]

Well, the tool I was going to use is a Snap-On Lumy/Mag 2, Tach/Timing Meter. But it won't work because glow plugs are required for use. Who needs electronics anyway? I am using a dial indicator. Thanks

 

[Power Wagon]

Let me caution you slightly...



Sometimes the TDC pin is not accurately placed. If that's teh case, you'll never be where you think you are.



I would use some method of determining true TDC first, and then go about setting the pump. The pin can be moved to the appropriate TDC point, using just a torx bit to loosen the retaining screws. It will slide back and forth quite a ways.

 

[Old Smoky]

Thanks for the advice Power Wagon. I will be sure to use an alternative method for determining TDC. I hope mine wasn't made on a payday on Friday afternoon. I will post the results.



Mike

 

[Old Smoky]

Thanks for the advice Power Wagon. I will be sure to use an alternative method for determining TDC. I hope mine wasn't made on a payday on Friday afternoon, if you know what I mean. I will post the results.



Mike

 

[paccool]

Mike,

Power Wagon is right about the timing. Mine was off about 2. 5 degrees.

 

[BushWakr - RIP]

Yup, me too, off by about 2*

Mine was timed with a light though. A pulse sensor is used to clamp over the #1 inj. line near the injector, then that signal is sent to a timing light. (all after finding and marking TDC of course)

It seems that 14. 5-15MM is equiv. to about 15* advance.



FWIW.



Bush'

 

[Old Smoky]

Set the timing today. It was at 1. 2mm. Idaho Diesel Tech talked me out of anything past 1. 31mm. So, that where it sets. I would be lying if I said I could tell a difference. Nothing seemed to change at all. Oh well.



I also tightened up the slack in the throtal linkage. There was abouth a 32nd" gap between the high-idle at WOT. That should be good for a whopping 1-2 hp. It now revs up to 2800rpm.



Mike

 

[paccool]

Mines set at 1. 7 and pulls strong from a standing start. Runs cooler EGT's as well.

 

[Power Wagon]

Originally posted by Old Smoky

Set the timing today. It was at 1. 2mm. Idaho Diesel Tech talked me out of anything past 1. 31mm. So, that where it sets. I would be lying if I said I could tell a difference. Nothing seemed to change at all. Oh well.



I also tightened up the slack in the throtal linkage. There was abouth a 32nd" gap between the high-idle at WOT. That should be good for a whopping 1-2 hp. It now revs up to 2800rpm.



Mike

Nonsense. You can run 1. 3 to 1. 8 and be ok. I would be hesitant to pass the 1. 7 range, though. Would think it a bit noisy and harsh sounding.



This isn't the opinion of a tinkerer... I worked in a shop for years. Many B engines are timed clear up to 2!

 

[JFitzgerald]

PW,



What timing setting would you recommend for my rig? It's my daily driver (at least 60 miles per day), and tows about 12K frequently also. I plan on swapping in a smaller housing soon too, leaning toward a 14. Thanks.