[firebird_1252]

hello all, i'm looking in to a 05 378 pete. 63 stand up bunk, 10 speed, 3.55 rears. it has a 475 c15. not too sure if its acert or not tho. anyway, at 70-75 running 30000lbs gross, if i knock it down to a 435 do you think i can knock 6.5mpg or better? oh this is in a dry van. oh this is also on flat ground 100% of the time.

[Heavy Duty]

Originally Posted by firebird_1252

hello all, i'm looking in to a 05 378 pete. 63 stand up bunk, 10 speed, 3.55 rears. it has a 475 c15. not too sure if its acert or not tho. anyway, at 70-75 running 30000lbs gross, if i knock it down to a 435 do you think i can knock 6.5mpg or better? oh this is in a dry van. oh this is also on flat ground 100% of the time.

How you going to get 30000 gross, you'll weigh more than that empty.

Try knocking the 70-75 down to 55, then you might get 6.5 mpg

[firebird_1252]

i haul us. mail. that is no weight what so ever. what do you figure the mpg would be around 70-75?

i'm also looking at a 05 volvo with a 400st isx.

[solo379]

Originally Posted by firebird_1252

if i knock it down to a 435 do you think i can knock 6.5mpg or better?

No. It will probably get worse. It is an Acert, and if you could run it steady at 1300-1350 rpm, ON A FLAT GROUND, you should get 7.0-7.5 mpg, or better. Running 70-75 at those specs, would do you 6.0 at best, but i wouldn't bet on it. If you want a CAT, to run at those speeds, look for 3.25 or higher. That's wont be a problem on a flat ground. Make sure your torque is 1850, than you might get 6.5 mpg, if slowing down, is not an option....

[firebird_1252]

looks like its the ISX for me.. thanks for the imput all.

[rank]

2005 C15 Acert, T2000 KW, 475 hp, 35,000 - 80,000 lbs, 75 mph, 4.8 mpg.

[Fredog]

I have a 2004 c-15 acert 475 13 speed, 355 rears, 5.5 at 80,000 and 6.5 empty

[firebird_1252]

unfortinaly that is way off where i want/need to be.

[Fredog]

me too, but you learn to live with it, at least I can pull a mountain.

[550hpW900L]

HAHAHAHA i bet the volvo will get 20mpg too doing 75mph.