2006 387 MPG Results

[Steel Horse Cowboy]

Ok, so I figured I would start a thread with my different MPG numbers for the new truck.

I run a dedicated lane, 4,500lbs down and empty back in a J&L Dry Bulk tank for roughly 2,700 miles round trip. My route never changes and it goes as follows:
Westville, IN (US421 to I-94 to I-57) to Tuscola, IL. Then from there I take I-57 to I-55, I-40, I-30 to Texarkana then AR549 to US71, I-220, I-20 to US79 to US59 thru Houston to Victoria then TX185 to Seadrift.

On my 1st trip this week I set my cruise at 1,350rpm which put me at 67mph. I got fuel and avg 7.2mpg for the trip down.
On the way back, i set my cruise at 1,250rpm which was 62mph and I avg 7.85mpg.

Next week i am going to set it at the 1,250rpm down loaded and see if it makes a difference with the 4,500lbs in the tank, which i doubt it will, but ya never know.

[Malaki86]

Since you run the same route with the same freight, I'd do a week at each RPM, then use the average for that week as the MPG for that RPM. Even though minor, things such as the wind, temperature and humidity will affect the MPG's. Just an idea, anyway.

[Steel Horse Cowboy]

Since you run the same route with the same freight, I'd do a week at each RPM, then use the average for that week as the MPG for that RPM. Even though minor, things such as the wind, temperature and humidity will affect the MPG's. Just an idea, anyway.

Yes, thats my plan...next week will be at 1,250rpm for the entire trip. Then the following week will be at 1,350rpm for the whole week, then I'll go 1400rpm (70mph) in the states I can go 70 in, the others will be at the 67mph setting

[solo379]

So, what's the point? What are you trying to find out? With that kind of weight, you don't need to worry about pulling power. You want better MPG, you run between 1250-1300 RPM. In your case it's 62-64 mph. You want to drive "faster", you'll have to pay for it. That simple. Have fun tho...

[mitchno1]

in new zealand you could tow that weight behind a 4+4 ute and get 10ks to the litre,just a thought

[Steel Horse Cowboy]

So, what's the point? What are you trying to find out? With that kind of weight, you don't need to worry about pulling power. You want better MPG, you run between 1250-1300 RPM. In your case it's 62-64 mph. You want to drive "faster", you'll have to pay for it. That simple. Have fun tho...

I just was seeing what the benifits were to driving slower compared to faster....or in this case, if things keep up this way, it will cost me $100 a week to go 4mph faster. Just was shocked at the idea was all. What can I say, i get bored doing the same damn thing each week LOL

[solo379]

What can I say, i get bored

I hear you....

[Steel Horse Cowboy]

Not to mention i did plan on doing some mods such as Pittsburgh mufflers, and maybe a PDI ECM and figured with my run being the same, I could post some REAL WORLD numbers up as I go along.

[solo379]

i did plan on doing some mods such as Pittsburgh mufflers,

Just for fun, ask any Pete dealer, how much is your muffler. I was thinking about the same thing, or Walker Noise-breakers, but it might be illegal emission wise.

[Steel Horse Cowboy]

Just for fun, ask any Pete dealer, how much is your muffler. I was thinking about the same thing, or Walker Noise-breakers, but it might be illegal emission wise.

I will do that tomorrow as the truck is going into the body shop to have the hood hinges replaced as they are bad (and the dealer is covering the total cost!)

I know my truck is not CARB compliant, so it keeps me out of CA anyways, but that's fine with me as I don't like going there. The Pitt mufflers are $275 for my truck a piece... but their same muffler that is 10" shorter, but the same width is $189? Since I'm going to replace the top of the stacks anyways, I think I'll go with the shorter muffler and a longer top stack (tyes it will fit, I measured) so the tops will be basically free! And the are 50 states legal!!!!!!!!!!!!!!

"Our new performance muffler solution for the 387

This muffler uses a acoustic louver sound dampening

This muffler is noticeably louder than our Quiet Performance muffler

Up to 50 additional horsepower and improved response

Lower exhaust gas temperatures

Fast return on investment and easy fuel mileage gains

Extra heavy duty construction. "

[solo379]

And the are 50 states legal!!!!!!!!!!!!!!

They are legal noise wise, but i was talking about emissions. CAT ACERT suppose to have catalytic converters in it. I was quoted $2500 each(i've got 2) at KW dealer.

[heavyhaulerss]

Why not just buy the donaldson 1000463 for $70.00 from ryder fleet products online? same as the p.p, one. straight thru design without the loud noise. http://www.ryderfleetproducts.com/ry...oductDetail.do

[Steel Horse Cowboy]

Why not just buy the donaldson 1000463 for $70.00 from ryder fleet products online? same as the p.p, one. straight thru design without the loud noise. Ryder

Because the DOnaldson one is only 9" wide, and mine are 11" wide. Unless I want to spend the money for someone to make a custom mounting set-up, I'm stuck with the 11" wide mufflers due to they mount to the truck AROUND the muffler, and the brackets would be too big for a 9" muffler.

[Steel Horse Cowboy]

They are legal noise wise, but i was talking about emissions. CAT ACERT suppose to have catalytic converters in it. I was quoted $2500 each(i've got 2) at KW dealer.

I have no idea what you are talking about here....this is my 2nd ACERT CAT enigne and none of them had catalytic converters on them. And the Pittsburgh mufflers are 50 state legal EMISSIONS wise as well.

[heavyhaulerss]

S.H.C. I am like you on the m.p.g. I document the mileage at every stop & every fill up. I know the wind, hills, weight, e.t.c. have a lot to do with the different m.p.g we get, but I want to keep track to see too what is the optimum speed,rpm to get the best m.p.g. without lugging the engine or going ridiculously slow. I also keep tabs on my m.p.g. to help me determine if anything may be needed such as time for overhead run or cac leaking. these can affect m.p.g. I had a great tailwind pushing me down i-65 last week. got 7.0 mp.g. had to recalculate 3 times to make sure I added the numbers correct. some may think different on this, but I have always put 5 lbs more air in tires than posted on sidewall. all mine show 105 psi. I put in 110 psi. none of them stay at 110 in the cold weather, they all drop over time. keep on experimenting with your m.p.g. & any other truck related info. it will be of use to someone.

[solo379]

this is my 2nd ACERT CAT enigne and none of them had catalytic converters on them.

That's why i've said ask your dealer. My truck is 2005, actually maid in may 2004, and engine february 2004. If it has no converters, why is such price? I'm trying to figer this thing out, let me know what did you find out....

[solo379]

Because the DOnaldson one is only 9" wide, and mine are 11" wide.

https://dynamic.donaldson.com/webc/W...210&item=21897

[Steel Horse Cowboy]

https://dynamic.donaldson.com/webc/W...210&item=21897

Still only 10" wide, plus it's 51" long...mine is 62.5"

[Steel Horse Cowboy]

That's why i've said ask your dealer. My truck is 2005, actually maid in may 2004, and engine february 2004. If it has no converters, why is such price? I'm trying to figer this thing out, let me know what did you find out....

I asked them today and the parts guy thinks you are talking about the resonator under the cab. Some call it a convertor, and mine was $875 to replace. Mine has this resonator and then 2 mufflers on the stack, so I asked them how much louder it would be if I just bought spools and removed the mufflers, and he said maybe 20dbl? Since the convertor/resonator is the main sound deadner, so i may just go thay route too..... aparently most KW's that have the stack out the rear (like mine) such as a T600 or T2000 doesn't have mufflers, but pete's do....guess to be more costly LOL

[repete]

I just was seeing what the benifits were to driving slower compared to faster....or in this case, if things keep up this way, it will cost me $100 a week to go 4mph faster. Just was shocked at the idea was all. What can I say, i get bored doing the same damn thing each week LOL

Are you sure it will ONLY cost $100 a week? That seems a little low to me after all thats only 25 gal. I'm just wondering. You get bored doing the same thing every WEEK? I do the same 3 roads every NIGHT! I watch the pot holes age!