New member with low mileage IDI

[Greg5OH]

Well that sure is impressive to me!

 

[ZWilson07]

I have been averaging between 16-18 mpg on the highway. And that is going around 60-65mph with the engine turning 2600-2800 rpm no load flat land.

How is that possible lol.

I barely can pull that off going 60-65 in my truck. But im more at like 2000 rpms.




On OP related note, nice truck; nice to see another low mileager left around like mine.

Does that topper have like a center compartment where the window section is or something? Looks pretty cool

 

[justinray]

I get anywhere from 16 to 19 just depending on what I have to do that day.

 

[Hydro-idi]

How is that possible lol.

I barely can pull that off going 60-65 in my truck. But im more at like 2000 rpms.




On OP related note, nice truck; nice to see another low mileager left around like mine.

Does that topper have like a center compartment where the window section is or something? Looks pretty cool

Well it has been a consistent average mpg ever since I have gotten the rig. I get even better mpg when the hydrogen is kicked on but I haven't used it lately due to a leaking reservoir. So for the past month or so it has been right around 17 mpg going down the highway. In town mpg is obviously a little lower than hwy mpg. I do keep the truck well maintained and have a fairly fresh injection system. Tires have 60 psi in them and air filter box is unrestricted. IP has been turned up one flat as well by PO.

 

[ZWilson07]

Well it has been a consistent average mpg ever since I have gotten the rig. I get even better mpg when the hydrogen is kicked on but I haven't used it lately due to a leaking reservoir. So for the past month or so it has been right around 17 mpg going down the highway. In town mpg is obviously a little lower than hwy mpg. I do keep the truck well maintained and have a fairly fresh injection system. Tires have 60 psi in them and air filter box is unrestricted. IP has been turned up one flat as well by PO.

ah ok, I was just mainly curious because of the rpm's. While I know these trucks will run forever at redline, I always thought keeping it around 2,000 rpm was whats going to be best for mpg's.

 

[towcat]

2000-2500 is good for best fuel economy. these trucks will run at 3800rpm all day long. when you have F450's with 5.13 D80's you're bouncing off the gov all day long.

 

[justinray]

2000-2500 is good for best fuel economy. these trucks will run at 3800rpm all day long. when you have F450's with 5.13 D80's you're bouncing off the gov all day long.

And wishing for another gear!

 

[ZWilson07]

2000-2500 is good for best fuel economy. these trucks will run at 3800rpm all day long. when you have F450's with 5.13 D80's you're bouncing off the gov all day long.

im suprised there is such a big window for the same fuel economy lol

 

[towcat]

And wishing for another gear!

problem is, you're pulling 15k gross (actual 16k-18k) and even in OD, when you hit a hill, the power drop off like a rock. around here even with a IH 4700 with a DT466E and a 7spd, you're still doing the same at 26k gross( 28-32k actual) the hills around here suck.

 

[Hydro-idi]

And wishing for another gear!

Haha I am always wanting another gear when I'm plugging along going down the highway.

 

[blakpete91]

How is that possible lol.

I barely can pull that off going 60-65 in my truck. But im more at like 2000 rpms.




On OP related note, nice truck; nice to see another low mileager left around like mine.

Does that topper have like a center compartment where the window section is or something? Looks pretty cool

It is basically a cowboy camper and a regular full bedside camper fiber glassed together. My rear window on my single cab is gone that way I can crawl back there and sleep if I wanted to. There is a window that separates the sleeping part from the rest of the bed but i can slide it open and crawl thru there if I needed to. I like it because I can throw my backpack and other stuff back there and still have room for passengers.

 

[ZWilson07]

It is basically a cowboy camper and a regular full bedside camper fiber glassed together. My rear window on my single cab is gone that way I can crawl back there and sleep if I wanted to. There is a window that separates the sleeping part from the rest of the bed but i can slide it open and crawl thru there if I needed to. I like it because I can throw my backpack and other stuff back there and still have room for passengers.

doesnt that leave a way for moisture or stuff to get inside the truck.

I assume its just likea regular topper that has a small gap between the bed and the cab. Albeit a small one so its like a big animal is going to crawl in but you know what I mean.

On a side note though, I kind want that topper now lol.

 

[79jasper]

The sleepers use a rubber accordian boot style seal thing between the sleeper opening and the cab window.

 

[ZWilson07]

The sleepers use a rubber accordian boot style seal thing between the sleeper opening and the cab window.

I need more of these in my life!

 

[blakpete91]

doesnt that leave a way for moisture or stuff to get inside the truck.

I assume its just likea regular topper that has a small gap between the bed and the cab. Albeit a small one so its like a big animal is going to crawl in but you know what I mean.

On a side note though, I kind want that topper now lol.

79jasper is right. There is a rubber accordion seal that goes in between the bed and the cab. Was installed in 89 and so far no leaks (knock on wood)