I will concede that the mpg off the ECM is spurious at best. But as for pump to pump calculations, if people can't get the tire rotation per mile for the tire they are using and put it in the ECM so that the calculations are close to reality, that is their problem. That way the odometer would be dead on. I have seen very few ECM mpg figures that were closer than .5 mpg to what the real mpg was. Even though I know that all the values are correct in the ECM.... transmission number, rear end ratio, tire rotation, etc..... my ECM alway shows about .6 mpg higher than pump to pump hand calculated. I don't think Henry's is off any more than that. He has discussed his hand calculated results and it still puts most of us to shame.
9+ MPG Class 8 5 Axel Trucks with Trailers
Discussion in 'Trucks [ Eighteen Wheelers ]' started by Dice1, Sep 15, 2011.
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Les2 Thanks this.
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http://sliceoftruckerlife.com/blogs/henry-albert/
Was reading over some of the blog posts. When he slowed to 60 mph, on a run, his mpg went to 10.51 mpg on the ECM. Now say what you will about how the ECM compares to actual, but with an ECM figure like that, he has to be doing well over 8 or even 9 mpg actual pump to pump.Les2 Thanks this. -
here we work in city 70k tipper truck get about 4.7mpg -
Here is an interesting read. Pete 389 getting high 7's low 8's running 70 mph tanking fuel.
http://www.pittsburghpower.com/support/viewtopic.php?f=7&t=849&sid=2e89e56d516c8d5be694ed488b0c8176 -
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I get arund 8 to a 8.5 on the Peterbilt with a serie 60 detroit 12.7 365 hp, there are a few big cam 350 and 400 cummins tha do about the same as my Pete. -
well you know what they say "if you cant say something nice dont say anything" -
Note: If you go to a bigger turbo with no wastegate you may want to replace stock OEM CAC for either a Duralite or a Vista Pro CAC that can handle 50+ lbs of boost pressure. I went with the Vista Pro that is an American made Duralite copy with a better warranty and less expensive.
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