UDC Sample Tunes

[jjpage]

jjpage
You can change any part of this you want to make it work how you want on your vehicle. I just tried this sample but left the rail pressure below 24k on the higher end as I am not sure my CP3 will keep up to this program. When I update my truck to handle more I can then turn it up. You can always try this and go back to the setup you are comfortable with also.

Just my opinion.. But I will say this tune is smooth and feels real strong. All I have done is try the lower and mid range at the moment, no WOT runs made and I like how it is working on my truck.

I need the roads to clear up around here before I do anything. Been driving my 99 Tacoma instead of my Dodge, hate all this liquid de-icer these idiots keep dumping on the roads.

My rail has been capped for years, knocking on wood here...

 

[jjpage]

Using the Lawless as your starting point. Compare your existing UDC file and CMP over only the sections of the timing section you want from your file to the Lawless version.

The use of CMP to copy sections from a compared file are very handy when doing exactly what you are hoping to accomplish.

I don't have any existing UDC files, haven't even plugged the dongle into my laptop yet...Thanks for the tip.

 

[JP-4.5]

There are alot of Sample files that can be used as starting points for your 2003-2004 years. I think they are standard Revo files.

 

[rlawless]

JJ,

When you are ready to start building your tune, use the 2003-2004 sample files provided with UDC and with the compare feature (CMP Button) build the low timing areas from the UDC sample and the upper areas from my tune.. It's almost like copy and paste..

IIRC cj42 has a 2003 and posted up a sample file somewhere.. I have it if you need a copy.. Below is what his timing looks like compared to the 2003-2004 Revo 9 sample..

 

[AH64ID]

As you can see in the sample files the timing for 03-04 and 04.5+ is quite different for the same tune.

 

[cj42]

jjpage I glad I can see another 03. John is right IMO in regards to timing on the 03's. If you look at the our stock timing vs 05's you see it. Our lowest timing is like -.4 then everywhere else is will below at 2-3 degrees. The 05's will have values as low -5 in the spool areas. I don't know if it's my injectors but I had to drop my timing down in the cruise areas to get rid of some timing rattle. I need to do some more driving on what I'm running now but I dropped my timing way down in the spool areas. Based on some of John comments I have been playing with tq management and my PoD to clean up some smoke. I would like to play more with rail pressure in the cruising areas.

 

[cj42]

I need some input from John and Randy on cruising rail pressure. What are you guys running for rail pressure in the 15% engine load areas @ two rpm ranges 1800-2000 and 1300-1500. Mine for example at 1850 rpm @12% engine load is around 8500 psi. I'm thinking I would want around 12000 psi. My thinking is higher pressure I would get better fuel optimization. I have been searching the Web on the 03's. I thought the 03's like shorter duration at higher pressure but I can't find anything yet.

 

[JP-4.5]

CJ, Why not look at Randys sample file he sent earlier. This would allow you to compare to his.

 

[rlawless]

I'm not at my computer right now, but I'm a fan of higher fuel pressures within reason for better atomization.. John stays within stock fuel pressure parameters..

2005 - HE351/A5K - ARP - Arson lll - 70HP Nozzles

 

[JP-4.5]

CJ This what you are looking for?

 

[AH64ID]

At 1800 rpms and the 18.9/25.0 cell I am at 14.8K and at 2K in the same cell I'm at 16.3K. I am running lower than stock in that region and really like it.

 

[cj42]

CJ, Why not look at Randys sample file he sent earlier. This would allow you to compare to his.

My rail pressure table is similar to Randy's but I thought they were both tweaking their tables to get max mileage. I just know that when I'm cruising on the highway at 70 mph in the 10-15% area my pressure seems low at 8000-9000 range. I'm thinking 12,000-14,00 is where I want to be.

 

[cj42]

CJ This what you are looking for?

Thanks JP. I'm just looking at what other people are running.

 

[JP-4.5]

CJ the image is from Randys sample file.. Is what he is running from his post yesterday. I am also running this but have lowered the rail pressure in the high ranges so not to go over 24k.

 

[rlawless]

I just know that when I'm cruising on the highway at 70 mph in the 10-15% area my pressure seems low at 8000-9000 range. I'm thinking 12,000-14,00 is where I want to be.

What is your RPM at 70 mph? 8000 to 9000 seems low, but so does your load percentage for 70mph, but I think your right, you should be at least 12000-14000 psi fueling.. The Revo 9 sample for an 2003 is between 11,000-13,000 in the cruise areas.

My load percentage is 19-25% (25-31% Headwind or slight inclines) most of the time @ 68 mph (1800 rpm) and the fuel psi is about 17,000-18,000..

 

[AH64ID]

The 03-04 and 07.5+ run lower pressure at cruise, I am not sure if it's all emissions or piston/nozzle combo. But I think both.

 

[cj42]

What is your RPM at 70 mph? 8000 to 9000 seems low, but so does your load percentage for 70mph, but I think your right, you should be at least 12000-14000 psi fueling.. The Revo 9 sample for an 2003 is between 11,000-13,000 in the cruise areas.

My load percentage is 19-25% (25-31% Headwind or slight inclines) most of the time @ 68 mph (1800 rpm) and the fuel psi is about 17,000-18,000..

Depending on incline my engine load is between 10-25%. My throttle will be higher though. I believe my RPM's at 70mph are around 1850.

 

[cj42]

. So if you put this on something with a better flowing turbo it may rattle a little.[/QUOTE]

Hey John I missed this quote a while back on your sample tune. why would a larger or higher flowing turbo cause rattle?

 

[metal_miner]

My rail pressure table is similar to Randy's but I thought they were both tweaking their tables to get max mileage. I just know that when I'm cruising on the highway at 70 mph in the 10-15% area my pressure seems low at 8000-9000 range. I'm thinking 12,000-14,00 is where I want to be.

I see the same thing with my 2003 in terms of load range at 70-75 mph empty cruise speeds.

Also, at less than 45* outside temperature the rail pressure readings do not match the UDC maps. The rail pressure is lower than the UDC maps by about 1000-2000 psi in the cruising speed range.

I have not noticed this temperature effect with my torque management though.

Do the users with +04.5 trucks notice the same rail pressure versus IAT trend?

It would be interesting if any EFI users can find a rail pressure versus IAT table.

If this is the case is the UDC rail pressure map optimization only useful for temperatures above 45*?

Well, we'll never really know unless we can datalog.

 

[cj42]

I just came back from the highway and I am noticing the same thing. The temp outside is 31 degree's and this is what I am seeing at 1850 RPM.
5% Eng ld 8500 psi
15% Eng ld 8900 psi
20% Eng ld 9000 psi