The TS Diesel programmer makes a difference in mileage and Power. With out the programmer, with the cruise control, on the engine speeds up and slows down a lot to try and maintain the certain speed. When you turn the programmer on you can feel the surge in the engine and the constant on/off gas goes away and the engine has that extra power to maintain speed. The programmer does not effect the ECM, so international will not know you are using it. I just take it off before I take it in for service and they have never said anything. Check out TS Diesel Website for more information.
I also started running Monster diesel additive, instead of the one that is in a white jug (most common one out there in stores), and since then it has run smoother and seems to get better milage. This also helps keep the injectors lubed up so there is less chance of a failure.
On my trip is was all 60mph road so i never went faster then 65, mostly had cruise set at 63. I seem to get 8-9+ when I keep it under 65. Most of the time, except when pulling boat, I get at around 8mpg. Not sure why this much better, maybe the really cold air helped make a difference.
As far as sound proofing, here is the post with a link to pictures that I have put up before.
http://www.flickr.com/photos/schmittm/
I purchased sound deading from fatmat.com, total cost is under $400.00.
Buy the Fatmat urethane Hoodliner kit
Buy the Rattle Trap bulk pack of 100sq ft
This will give you enough to put the Fatmat down first under the whole hood then put the cut and piece the hood liner on top of it. This will take you some time and sitting on your radiator putting the pieces on.
Then I took door panels off and put one layer on doors. To take panels off push the little circle inside the clip in and then with a small flat blade you can pop clip out. Take screws holding pocket off and then the two screws in the top handle by window. Pull up on panel and it will come right off. Very easy.
When panels were off I took them down to upholstry shop and had them put matching leather in the inserts instead of the blue fabric so they will match the darker color of my seats. Still need to add this picture.
Then I took the trim off, seats out and pulled the rubber floor back as far as possible and put on two layer of the Fatmat. I used left over hood liner foam and did the whole fire wall were I could reach.
Then get a can of expandable foam and look between where the cab meets the coach, by the batteries and from underneath on the passenger side. You will see a bad seal job and gaps that let sound or a possible mouse in. Stuff your arm in and pump the crack full of foam.
Then I put sound deading material in the battery compartment and under the floor of the motor home. Get your self a creeper to lay on and mover around. I also used some of the left over hood liner and put that between the transmission and the floor from underneath.
I then put the sound deading material on the under side of the floor where it was easy to get to, for example by propane tank almost from one side to the other. This will help keep the noise from the drive line and the sound that bounces off the road. Every little bit helps.
If it does not want to stick well or after a short trip check to make sure it is not falling off. If it is, get a heat gun and go over it with heat gun and roller again and it will stick for sure.
If you want to add wood dash kit you can call Forest River Automotive directly and for $240.00 get the three piece kit.
(574) 522-7472 and ask for John.
57884 County Rd 3
Elk Hart, IN 46517
Any questions let me know.