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Well my first relaxed trip to Caldwell ID. I know the odometer is off and speedometer is off by about -3 to what is actual speed. Now that being said I know its 125 miles from home to Ontario. Now I filled in Riggins ID that's adds on another 15 miles. From Riggins to Ontario showed 123 miles. The odometer is slow too. All from the 285 tires.

 

All that said I've hit 21.0 MPG which would actually be higher if the odometer wasn't slow.

 

The other thing I'm pretty sure this truck is 3.73 gears which with the 285s I'm running the RPMs are roughly the same as my 2002 with 3.55 gears and 245s tires. This combo seems to be great for towing weight.

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Now I've gotta ask about tuners for the 3rd Gen. I've worked with Smarty for nearly 3 years. I've played with self contained EFI Live tuners (not the full package). Then another friend mention ed another tuner like HP? He was sure of the name at the time but I figured I'd ask.

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1 hour ago, Doubletrouble said:

 Quad adrenaline won't fit the bill? Or are you just looking to experiment with something different?

I believe quad is the best for vp not for common rail, smarty should be good for that.

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3 hours ago, Doubletrouble said:

 Quad adrenaline won't fit the bill? Or are you just looking to experiment with something different?

No. Quadzilla is not a solution being its just a rail pressure box. On common rails you need to flash the ECM with all the core values. Even Jacob Kidd suggested other solutions for Common Rails. 

 

2 hours ago, Dieselfuture said:

I believe quad is the best for vp not for common rail, smarty should be good for that.

Correct. Smarty after working with them this is not a solution either knowing how the whole thing works. I really don't want to deal with Smarty for a tuner. I know what they have for support and not what I want to deal with either. I know way too many secrets of that group. Not one I would like to visit again.

 

 

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This truck had a "Bully Dog" again another tuner that is just a rail pressure adder. Doesn't flash the ECM for core values. Like Quadzilla is all 2D layout for the most part but when you get to common rail its all 3D graphs. Then this data is flashed back to the ECM. most of these hijacks the CANBus signal throws a "priority command" then injects the new value to the bus and the VP44 takes it.  The other thing I'll need to setup Virtualbox and get my copy of Windows back out. 

 

The only two common tuners that do flash the ECM is...

  • Smarty Touch
  • EFI Live

Both of these tuners have full tables of timing, fuel, boost, etc... Example.

 

image.png

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21.77 MPG seems pretty darn good to me!  I know if I had a truck like that and wanted more power/MPG I'd be asking Apache John where I should start.

 

I know you guys have emissions testing in ID, does that rule out camshaft change to something more similar to the 12 valve?

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Posted (edited)

An MM3 with UDC Pro is what I would run. UDC Pro has more tables that can be adjusted and that leads to a better daily driver. 
 

The MM3 is the same hardware as the Touch but doesn’t have the canned tunes, which you don’t need. The MM3 also comes with the commod included, while the touch doesn’t. 
 

My 05 had some good mods: cam, turbo, injectors, pistons, and tuning. It ran cleaner than stock and had no issues passing emissions. 
 

Which bully dog was on the truck? Some are very similar to basic S06/Touch Smarty tunes, some are not. The basic Smarty tunes are better thou. 
 

Aside from a very few trucks that ended up being recalled all G56 5.9’s have 3.73’s. 
 

With the G56 AD ratios the 35’s are helping out quite a bit. On 04.5-06 5.9’s the timing really falls off above 2000 rpms and takes the mileage with it. Nothing some tuning can’t fix thou. Light load, like the downhill from Riggins to Ontario, and sub-2000 rpms will get great mileage. 

Edited by AH64ID
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