2003-2004 UDC Info
- Thread starter cj42
- Start date
JOESHTRDDSL
Nothing Special
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Edge CTS. I try to use all 3 but I need to find a way to keep notes while I drive.
JOESHTRDDSL
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That's funny but a good idea.
bgreen776
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Great thread! Maybe you early third gen tuners could help a newb out?
Three questions if you don't mind me asking:
Approximately what are your timing splits like on your nastiest 03-04 tunes?
Approximately what is your max timing value?
Do these two pictures represent, approximately, the path you would see when downshifting at 55 mph and passing?
I'm fighting a stutter that my 03 Dually had, which John tuned out for me, but am now experiencing with my wifes 03 Single Wheel. If I mash the throttle at 55, the transmission will downshift and as the RPM's come up under load I will get a massive stutter/pop/whatevertheheck at around 3000 rpm that I was able to tune out by running very low timing. (16* at 2900 rpm)
My splits are really low too. See third picture.
Three questions if you don't mind me asking:
Approximately what are your timing splits like on your nastiest 03-04 tunes?
Approximately what is your max timing value?
Do these two pictures represent, approximately, the path you would see when downshifting at 55 mph and passing?
I'm fighting a stutter that my 03 Dually had, which John tuned out for me, but am now experiencing with my wifes 03 Single Wheel. If I mash the throttle at 55, the transmission will downshift and as the RPM's come up under load I will get a massive stutter/pop/whatevertheheck at around 3000 rpm that I was able to tune out by running very low timing. (16* at 2900 rpm)
My splits are really low too. See third picture.
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No sir. I'm probably don't another 30 prgs since then.
The stuttering at 55 I have experienced as well but I really have to stuff it to do that @55. I was thinking that was my tranny slipping a little. If I know I have to stuff it I turn off overdrive.. So now I need John to chime in to confirm this can be programmed out..
The stuttering at 55 I have experienced as well but I really have to stuff it to do that @55. I was thinking that was my tranny slipping a little. If I know I have to stuff it I turn off overdrive.. So now I need John to chime in to confirm this can be programmed out..
bgreen776
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It can be tuned out, if you and I are talking about the same thing. John did it with my Dually, and with some tips from him I've been able to do it with the wife's truck, but I had to turn the timing WAY down. I'm in the process of slowly re-advancing the timing in very select areas to prove out the location of the stutter.
JP-4.5
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- Feb 14, 2008
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I have a 2004.5 and use the Ultra gauge to monitor load and rpm.
I had a stutter at highway speeds. Watching the ultra gauge I was able to see load and rpm. When I looked at those areas in UDC there were timing values on adjacent cells that had values 5-7 degrees different. Between the cruise and spool area where yellow and red overlap. I smoothed that area out so adjacent cells were not so far apart and my stutter was corrected. I think if truck ends up on the edge of one cell or another if there is a large differences the stutter is ECM changing timing back/forth. Seems like it cannot decide which cell it wants to use.?
I had a stutter at highway speeds. Watching the ultra gauge I was able to see load and rpm. When I looked at those areas in UDC there were timing values on adjacent cells that had values 5-7 degrees different. Between the cruise and spool area where yellow and red overlap. I smoothed that area out so adjacent cells were not so far apart and my stutter was corrected. I think if truck ends up on the edge of one cell or another if there is a large differences the stutter is ECM changing timing back/forth. Seems like it cannot decide which cell it wants to use.?
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Sorry I didn't mean to come across that I didn't believe you. I was just hoping John would chime in and maybe give us the effect. What is happening to the engine...
I don't have the stutter then if it's in the cruising area. If I'm going 55mph cruising and just stomp on it sometimes I believe my tranny slips a little. So now I just turn OD off right before I stomp on it then I can turn it back on when I need to do rpm's.
I don't have the stutter then if it's in the cruising area. If I'm going 55mph cruising and just stomp on it sometimes I believe my tranny slips a little. So now I just turn OD off right before I stomp on it then I can turn it back on when I need to do rpm's.
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I had time to like what I'm at. I'm at program 80 so I have made a bunch of changes. I'll have to go back and compare that version to what I'm running now but I know my tq table is much higher now, I am messing with only a few cells in the duration table now and I'm sure I have tweaked my rail pressure in some areas as well.
JP-4.5
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cj42,
Do you have a rail pressure gauge? I had my truck pop/backfire long ago when loading truck under hard acceleration. I believe I was draining the rail and running out of fuel. Since then I added an arson III to stock CP3 and a little larger injectors and had not had any pops/backfires since doing that. Maybe you are just running out of fuel? Might be calling for a little to much fuel than truck can provide?
Do you have a rail pressure gauge? I had my truck pop/backfire long ago when loading truck under hard acceleration. I believe I was draining the rail and running out of fuel. Since then I added an arson III to stock CP3 and a little larger injectors and had not had any pops/backfires since doing that. Maybe you are just running out of fuel? Might be calling for a little to much fuel than truck can provide?
xDiesel03
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- Oct 29, 2013
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Here is the tune I've been running recently in my 03. My mileage is way down, but it spools very fast and EGTs are extremely low. I used a combination of some of the sample tunes posted to get a baseline for rail pressure, splits, and duration, and then used the timing calculator for the timing map. My max split on this tune is 48.2 at 3500rpm and 100%.
Light Towing: In sixth it spooled up to 20psi at 1600rpm accelerating with a 2200lb load uphill. I see a max of around 34-35 psi with the 63/68/12 wastegated - I haven't opened the wastegate all the way up because I only have a 30psi gauge and no studs. Towing up a 4-5 mile 6-7% grade with cruise set at 75mph I didn't exceed 725 post-turbo. Max boost was 29psi. Mileage was 14.23 and 14.61 hand calculated.
Empty: I'm seeing 500 post turbo and 6psi cruising on flat ground at 75mph. Mileage was 17.42 and 17.6 hand calculated.
I still have a good bit of smoke under heavy acceleration at low rpms, but once I pass 2000rpm its clean and smooth all the way to the top.
Ok, and now for my questions...
What are you guys running for splits to get the best mileage on an 03? I used to see over 20mpg with the Smarty Jr at 75mph and would like to get it back over 20.
What about maximizing power? I know rail pressure will get me there, but what is the maximum "safe" limit for the injectors, and are the bodies, internals, or nozzles the limiting factor?
I really need to get a new boost gauge and something to monitor load and rail pressure to properly tune. Has anyone used the Motorsport Diesel Common Rail Monitor, or will an ultra-gauge do just fine for UDC tuning? http://www.motorsportdiesel.com/storename/motorsportdiesel2/ViewDept-277840.aspx
Light Towing: In sixth it spooled up to 20psi at 1600rpm accelerating with a 2200lb load uphill. I see a max of around 34-35 psi with the 63/68/12 wastegated - I haven't opened the wastegate all the way up because I only have a 30psi gauge and no studs. Towing up a 4-5 mile 6-7% grade with cruise set at 75mph I didn't exceed 725 post-turbo. Max boost was 29psi. Mileage was 14.23 and 14.61 hand calculated.
Empty: I'm seeing 500 post turbo and 6psi cruising on flat ground at 75mph. Mileage was 17.42 and 17.6 hand calculated.
I still have a good bit of smoke under heavy acceleration at low rpms, but once I pass 2000rpm its clean and smooth all the way to the top.
Ok, and now for my questions...
What are you guys running for splits to get the best mileage on an 03? I used to see over 20mpg with the Smarty Jr at 75mph and would like to get it back over 20.
What about maximizing power? I know rail pressure will get me there, but what is the maximum "safe" limit for the injectors, and are the bodies, internals, or nozzles the limiting factor?
I really need to get a new boost gauge and something to monitor load and rail pressure to properly tune. Has anyone used the Motorsport Diesel Common Rail Monitor, or will an ultra-gauge do just fine for UDC tuning? http://www.motorsportdiesel.com/storename/motorsportdiesel2/ViewDept-277840.aspx
estrada5.9
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- Feb 27, 2007
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Look at the Smarty Jr. tunes you used to run and use those values for your cruise zone. Then adjust as needed at least you will be close to what you were.
I like my ultra gauge. Cheap and it works. With 03's rail pressure won't read with a ultra gauge FYI.
I like my ultra gauge. Cheap and it works. With 03's rail pressure won't read with a ultra gauge FYI.