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For mine with the 3:55 rear end, 265/75r16 tires my spot on the rpms is 1600-1625
Now that gives me 58-59mph.
Even on the parts of the Alaska Highway that I could do 65, I don't for me it is not worth the extra speed for fuel that I will burn.
I have been keeping records of mileage and fuel on this van from day one. I have run tests to see what a higher rpm, speed will do for mpg, and for me it lowers it.
With Diesel at 3.699 here..... it is a difference between .22 or .30 per mile...
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Winter is here again, and yes I mean WINTER.. the temps are likely to reach -25F and then there is the snow and the dark.
2000 E350 7.3PSD, Hellwig Stablizer bar,140 Lightforce with covers, 55Watt High/Lows HID's , extras in the bumper. 4"Aero Turbin and 4" all the way back. 1705 program, Scangauge II,265/75/16E Toyo Open Country, My Photos http://photos.thedieselstop.com/showgall...&stype=&ppuser=
"FAILURE IS NOT AN OPTION"
IT IS MINE ALL MINE.....  (The Van that is, it has been Released by Lenholder)
Last edited by Alaskapsdvan; 10-25-2009 at 04:10 PM.
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