1700 rpm and maybe about 3 psi

 

Thats what I call hyper-miling with a 12valve.They had an article a while ago where they got 30mpg on a dually by folding in the mirrors and taping the wheel openings closed as well as some other stuff with tape.

Wayne

 

tonneau cover x 10

However, someone put a 12v, 215 with either an HX40 or just a 16cm housing & a 10 plate in a Dakota & beat 30.

 

those bigger exhaust housing help alot. im hoping the sps62 helps too

 

What rpm are you at when you are doing 70mph?

 

like 1700 1800. the only time i see over 2K is upwards of 90+

 

haha wow with numbers like those it might be fun to see the top end on that beast, have you ever seen where it tops out?

 

i get about 10mpg

It sounds like you have a 3.55 rear?

 

I bet the transmission (8 speeds) has a lot to do with the mileage increase. I would like to see someone put in a real low gear ratio rear end in and hit the mileage out of the park. The vehicle would have terrible torque but I figure the diesel would make up for the loss in torque and allow more speed.

DK

 

Congrats Crabbelle, and thanks for sharing what all you hae done.

 

I get 12mpg I'm glad to find out someone else is living in my world

 

Think its due to your 370's? I know mine is the ddp4's. I got 18 before that. however I can now close down 4 lanes of highway, the black cloud just never stops rolling out. I think i need to keep tuneing

 

My last fillup was 15.9 mpg, mostly city stop and go, 100% AC, and the occasional turn up of the Adrenaline and burning the tires in 3rd and 4th. For my current tank of fuel, I have committed to leave it on level one=timing only, and try to get maximum mpg in stop and go Las Vegas traffic. I will report in a week when I fill up.

 

ive buried the needle a few times on the road and still had more to go like about 1,000 rpms (4k gsk). i just cant find a long and flat enough road to crank it up. the next time im on the dyno im going to see what my top speed is. but after like 90 2,ooo rpm this 14 year old truck starts to "rattle".

 

when i got my 97 it had 160k on it. at 175k I put a new trans in it and the gear vendors. I went from 18mpg to 24 mpg empty on the highway at 75. 285/75 tires, 4:10 gears. Then I put a #5 plate and 370s in and when I was careful, empty I was able to get almost 25. now Ive gone down to 18-19 again. I cant figure that one out oh ya, at 75 my rpms are at 1800