MPG VS. SPEED
#71
Member
Join Date: Jan 2007
Location: Greenville, NH
Posts: 185
Originally Posted by solo379
Originally Posted by serbie
Spec's and speed will determine your mpg. Simple, easy fact.
It's also important, how you get to that "speed", be gentle with that pedal, it's not a NASCAR! Keep it steady, remember,"up and down", cost you money! I use just enough peddle to get the truck rolling.. when I can.. grab the next gear with lugging the hell out of the motor and do it again.. till I'm up to road speed.. then maintain that speed with as little peddle as possible.
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Don't drive like an ass! ![]()
#73
Senior Board Member
Join Date: Aug 2005
Location: jackassville (winnipeg, mb)
Posts: 3,280
There you go with your ad hom attacks again. Sorry, I'm not going to stoop to your level.
Again, I ask for you to participate in the debate, and counter my points. So far you've acted like a 13 year old kid. anyways, until you bring up some valid points, I'm done here.
#74
Board Regular
Join Date: Oct 2005
Location: Effort, PA
Posts: 222
Originally Posted by allan5oh
There you go with your ad hom attacks again. Sorry, I'm not going to stoop to your level.
Again, I ask for you to participate in the debate, and counter my points. So far you've acted like a 13 year old kid. anyways, until you bring up some valid points, I'm done here. And it's about time your done here, it less garbage to sift through.
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Lets go....
#76
Board Regular
Join Date: Oct 2005
Location: Effort, PA
Posts: 222
Originally Posted by SteveBooth
Don't waste your time Allan. I think most everyone on here agrees with you.
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#77
Senior Board Member
Join Date: Aug 2005
Location: jackassville (winnipeg, mb)
Posts: 3,280
Originally Posted by jegzus
Originally Posted by SteveBooth
Don't waste your time Allan. I think most everyone on here agrees with you.
If you think that a car/truck can get the same fuel mileage at 70 mph then at 60 mph, your a complete fucking moron. That's all there is to it. One truck, not two different trucks, ONE truck. Slow it down to 55 mph, and it will even get better fuel mileage. If it's geared incorrectly, you can drop it to 12th gear and still get better fuel mileage. I've tried this several times. So what can you bring to the table other then your "stupid" comments? So far you've completely struck out.
#78
Senior Board Member
Join Date: Aug 2005
Location: jackassville (winnipeg, mb)
Posts: 3,280
Here's a link for you to chew on:
http://www.kenworth.com/brochures/FuelEfficiency.pdf http://www.kenworth.com/FuelEconomyWhitePaper.pdf
#79
Board Regular
Join Date: Oct 2005
Location: Effort, PA
Posts: 222
Originally Posted by jegzus
Originally Posted by allan5oh
If I'm not right about this, counter my points, and refrain from ad hom attacks.
You have offered nothing but your opinion and a reference to an article that you read somewhere and that is all. If going slower saves you fuel in your vehicles that is fine and dandy. But that is not always the case, just like in my 97' ford dually power stroke, i got better fuel mileage at 72 than I did from 60 up to 72. So hmmmm looks like you were right. As I said get over yourself, you do not know everything. I know it's hard to believe being a trucker and everything but the sooner you realize that the better it will be for everyone. Hmmm I have PERSONAL experience with getting better fuel mileage by going faster. Oh and here is the biggest thing in that brochure.....
Originally Posted by Kenworth brochure Driver tips
Maintain optimal RPM for the specific engine. Each engine has a unique torque curve. Drivers should operate at the appropriate RPM to maintain speed
and maximize fuel economy as recommended by their engine manufacturer. This range is typically between 1,200 and 1,600 RPM’s.
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#80
Senior Board Member
Join Date: Aug 2005
Location: jackassville (winnipeg, mb)
Posts: 3,280
Originally Posted by jegzus
So your saying that if in high gear my sweet spot is 65-68mph I should slow down and run below that to get the best fuel mileage??? In all that aerodynamic hog wash even they say to follow the ENGINE's manufactures recommendations for best fuel economy. So what now all knowing super trucker?
The sweet spot is the best compromise between fuel mileage and pulling ability. Also, the sweet spot changes depending on the load of the engine. Notice that engine manufacturers recommend a higher cruise rpm for heavy haul applications. Do you think it will get better fuel mileage? No it will not, it's a compromise between mileage and gradability. The same can be applied to speed. You'll need more rpms to run at 75 then you would at 55. Show me anywhere that states running slightly below or below the sweet spot will result in worse fuel mileage. I'm begging you. And yes, if you slowed down, you would get better fuel mileage. Try doing a few repeatable tests, eliminating variation (temperature, weight, wind, driving habits, overfilling the tanks, always filling up at the same spot). You'll be surprised.[/i] |


