Checked the engine tag on my 98, and it says 14 degrees. I'm curious how much difference going to 15.5-16 degrees would make. It's $225 to get it done, and I don't mind paying it, but only if I'll be able to see some benefit other than a little mileage gain. I only fuel up every 3-4 weeks, so it's not as big of a concern for me as it is some others.

I don't want to go past 16 because of my stock HG, so is it worth it?

Thanks,
Chad

 

i think you will be happy. i got the tools off ebay for $100 and did it myself. but the timing set from ebay was pretty much junk, get a good set if you do buy one.

 

Are you handy with tools? You can get the Snap On timing set (SP-500) for the same price you'd pay to have it done once, and then you know how to do it, and can do it in the future yourself for free.

 

IIRC, a good set is over $200. I don't plan to do it more than once, and I really don't have the time or desire to do it myself.

What kind of differences should I expect from a 1.5-2 degree advance? I believe you when you say you think I'll be happy, but I don't really know what to expect.

Thanks again.

 

little slower spool but lower egt's at highway speeds and supposedly a small increase in fuel mileage.

 

What else is in a kit thats needed besides a dial indicator? I bought one the other day and am planning tomorrow to fab up a magnetic base and read the manual to fiqure out how to do it. Im the right opposite, i try to do everything my self, with my mods i plan to go somewhere around 18-20*. Just need to find out what that is in thous. on the dial ind. ???

 

DV valve socket

 

I might skip on it if I'll loose my quick spool up. The slight mileage gain doesn't matter to me because I never drive my truck, and with the smallish loads I haul, EGT hasn't been an issue. Rarely gets over 1200* on a long hard pull.
Maybe later if I get more serious.

 

You may notice quite an improvement in performance if your timing has slipped at all over the years. And they do slip. Mine was down to around 9 degrees when I got it done. If you decide to get it done, make sure the shop finds your true TDC and not just use the timing pin.

 

it shouldnt affect your spool up, but it will play togher well with the 3k gsk. Just my opinion

 

I don't think mine has slipped, because it runs freakin great. Never gives a bit of trouble, and has great power for what's been done.

It'll go to Oregon Fuel Injection, as that's where the Cummins dealer said would do the best job.

I did have a guy offer to do it for me, but I shy'd away after he told me that he doesn't use a dial indicator, and the best way is to simply rotate the pump gear one tooth.
Seemed way wrong to me, so I said thanks, but no thanks.

Glad I've read a bit on here, or I might not have known better. Thanks, guys!

 

keep us updated after you get it done. i think youll be happy.

 

Still no specs from someones that done it. I always read all the data in mm im just curious to see what people are doing with a reg dial ind. that read thous. i will hunt up the conversion charts and see if it makes sence to me. But if anyones done it them selves on a 180hp pump and went somewhere in the 16-18 range, do you happen to know what that was for you in thous. on the dial? Thanks

 

DOes this help any?

CPL 2023/2175

STATIC TIMING (DEGREES BTDC)
PLUNGER LIFT (mm) AT TDC

12.5
4.89

13.0
4.98

13.5 (NOMINAL)
5.07

14.0
5.16

14.5
5.25

 

Divide mm by 25.4 to convert it to inches. ie: 5.07mm / 25.4 = .1996 or 199.6 thousandths.

If the timing chart doesn't go high enough, look at how much the plunger goes up for each 1/2 degree and add the amount for your desired timing.