3406e fuel consumption

The place for all your high performance discussion

3406e fuel consumption

Postby homer on May 24th, 2010, 7:38 am

got a 3406e that we have never been happy with, we ballanced it, stuck a FASS on it PP ballancer, ported exhaust manifoild, gave it a 3 angle valve job, had all the injectors checked out at cat's, no faults. it gets 1.8km's to the litre. runs at 1500rpm at 100km/h. single trailer running east west accross australia, so easy running except for wind. seems to go good from 1500 to 1700. oh yea a turbo blanket, gutted the muffler, put a bigger intercooler on it. how can i get better fuel economy out of it. seems dopey and the turbo whistles something shocking (cat reman)
homer
 
Posts: 2
Joined: May 24th, 2010, 7:28 am

Re: 3406e fuel consumption

Postby Fernando on July 19th, 2010, 10:57 am

Is this truck a 475 or a 550? If your running more than 550 that the stock cat turbo you are running might have become a restriction. Also are we talking about a 379? a W900? Or something else? How strong are the cross-winds over there? A nice crosswind hitting the trailer at 45 degrees can be worse then a direct headwind. Whats the ratio on your drives? What transmission? Are you running in overdrive?
Fernando
Site Admin
 
Posts: 305
Joined: May 18th, 2009, 12:36 pm

Re: 3406e fuel consumption

Postby homer on September 8th, 2010, 11:37 pm

its got 358 gears and is 4964 herratage western star. it is spose to be 475, i have a 600 box i could throw on, also i have a 79 deg. thermostat in it, could it be running too cold and the computer is telling it to fuel up? could be cheaper to buy a detroit powered truck than keep pouring fuel down its guts. we run on cruise most of the way and the cruise seems to let the motor die then gives it a boot full.
homer
 
Posts: 2
Joined: May 24th, 2010, 7:28 am

Re: 3406e fuel consumption

Postby Flyingpig on September 13th, 2010, 8:05 am

Check your muffler! I once installed a straight through muffler. It was 5 inch all the way. You could have dropped a softball through it but it proved to be a major restriction. I could tell as soon as I pulled out of the driveway. It was surprisingly quiet but nothing happened when I stepped on the loud pedal. Ive always kept careful track of my mileage and that muffler cost me $147 extra for only 5 days of running. It came off when I got home and a straight through resonator went on. It was louder but the mileage came back.
Flyingpig
 
Posts: 8
Joined: August 19th, 2010, 11:30 pm


Return to Power and Fuel mileage

Who is online

Users browsing this forum: No registered users and 1 guest