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Everything posted by raccoonjoe

  1. Real quick, before I end up forgetting. I spent a long time talking to Cummins, he told me that in stock form my truck makes 440 torque @ 1600-2100, and 235 hp @ 2300-2700 rpm. Im still waiting to hear back from Smarty to figure out what their programmers will do.
  2. OK, after a bit, I'm back. I took my truck to the local dyno, and got some mixed results. I was having troubles with the transmission wanting to shift, and it was giving me some mixed readings on torque and horsepower numbers. Basically, every time the transmission would shift, it would peak the torque curve. This seemed to happen about 2200 rpm or higher, under WOT. The closest thing I can guess, I did have a few runs that showed a peak torque between 1800 and 2000 RPM. I'm working on a few other sources of info, to see if I can get any more accurate information. May also be able to make another dyno run in a few weeks. I had a issue with fuel pressure up in North Dakota last week, ended up installing a FASS 150 Titanium lift pump. Truck is running great now, but for some reason my fuel gauge doesn't work now. It seems sometimes that if it's not one problem, it's another, right? On my last run back from Colorado, I seemed to get the same ~20 mpg whether running at 70 mph (1900 rpm), or running 65 (~1750 rpm). I know that going from fillup to fillup across states isn't the most accurate method of measuring, but it's what I have to work with. While regearing axles isn't really in the cards financially, I will be needing to replace my tires in the next few months. This should allow me to go smaller to adjust for the gear difference, if necessary.
  3. I'll do my best here. The ScanGauge provides readouts from the truck's OBDII system. (https://www.scangauge.com/products/scangaugeii/ for reference). I use it to keep tabs on IAT and coolant temps, as well as a "guessimate" of mpg. (All of my mileage figures are hand calculated, from the same station, same pump, unloaded every time. I fill up at the beginning of every trip, and log fuel purchases and mileage until the next time I can fill up at my favorite station.) The 6600# weight was from the scale at my local gravel pit. ~30 gals of fuel, driver + passenger, my toolbox/chains/straps/etc onboard, but not my 50 gal aux tank. My scale ticket from Alberta on 4/1/14 says 1960 k (4321#) front axle, and 1350 k (2976#) rear axle. Truck, with me, my gear, and about 50 gal. of fuel onboard, no trailer. That is a certified Canadian scale, so it's probably the most accurate. Total weight of 7297 pounds. Tires are Firestone TransForce A/T, 265/75R16, on stock steel rims. About 50% tread, run at 65 PSI. I run bumper pull travel trailers or horse trailers. Usually no 5th wheels right now, no in-bed campers at all. Curb weight and sizes will vary, from 2000# up to 10,000#, 20' to 37' I just bought this truck a couple months ago, haven't had time to get it completely outfitted yet. I've got a set of gauges, boost/pyro/temp. The only one installed right now is a trans temp gauge, mounted in the pan. The others should be going in this week, as I've got some time off. I will also pull a diff cover (probably the front) to verify the gear ratio of 3.54. I'm also going to try and make a couple of pulls on the dyno at a local automotive college. I want to make a pull with stock ECM programming, as well as a couple with the Smarty on different settings. I don't have much experience with these trucks, having mainly run bigger, IH and Cat motors in my past, where fuel efficiency wasn't nearly as much of a concern. I know there are aerodynamics issues with this big of a truck, things that I will be addressing. My only other comparison is word of mouth from other drivers. Just met another yesterday, with an identical rig, except 2wd. He claimed to get 14 loaded, 25 empty, but didn't have any numbers to back it up. YMMV, as they say
  4. Moses: I'm a camper jockey the same as Demerchant, and I could use some help. Truck specs are as follows: 02 Dodge 2500, 8' box, quad cab, 4wd, 3.54 gears, 250k miles. Completely stock, with the addition of a low fuel pressure light, a ScanGauge II, and a Smarty S03 programmer set to level 3 (towing). I also have a FASS DDRP lift pump, and a bed mounted 50 gal. fuel tank. Empty weight (without the bed tank), loaded with my gear, was about 6600 #. The best fuel loaded economy I've managed was 14.3, running from IN to NC with a strong tail wind. Empty? Maybe 22 mpg. Averages are usually more like 10.5 loaded and 18-20 empty. Round trip mileage usually comes out to 14. Loaded speeds are kept to 60-62 usually, downshifting to 3rd when climbing hills. I set the cruise at 62 when I'm running home empty. This keeps my rpm around 1600 in 4th. I lower speed in 3rd, according to the mountain I'm trying to climb, usually 50-55 I'm struggling to get good mileage out of this rig. I started in this business running a worn-out Chevy 2500 2wd, with a 6.5TD. I bought this Dodge a few months ago, hoping for more mileage and easier towing. The Chevy would deliver 22-24 empty and 11.2 loaded, consistently, driven the exact same way. I dropped a pretty penny on this truck, because it had a reasonably straight body, new factory transmission (with single disc billet TC), and a completely rebuilt fuel system (new stock injectors, VP44, and DDRP lift pump about 2 years ago.) I'm planning on adding a FASS Titanium 150 LP when I get my taxes back for longevity and reliability. Really hoping to have a million mile motor on my hands, but I've got to do something about fuel economy. Fuel prices are bad enough here in IN, but I spend most of my time in The Great White North, where fuel prices *start* at $5.25/gal. I had this crazy idea about lowering the truck, but can't figure out how to get around the issue of oil pan-front axle clearance. Thanks in advance Paul
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