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post #1 of 13 Old 12-23-2009, 08:01 AM Thread Starter
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Most Efficient Rpm

I do alot of highway driving and was wondering what is the most efficient rpm for the 6.0L at highway speeds?

2007 F250 Xlt 4wd
aFe stage 2 intake, 6" Aussie stacks, Sct X3 (Erics tunes)
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post #2 of 13 Old 12-23-2009, 08:06 AM
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I saw the best mileage between 1900-2000 RPMs
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post #3 of 13 Old 12-23-2009, 08:17 AM
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I found that with my tune I efficiently pass everyone around 3500-4000 RPM

My milage is there not so much at a specific RPM but when that little friendly boost gauge says down. Do 55-65mph with 3:73s and you will be good!

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post #4 of 13 Old 12-23-2009, 08:24 AM
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Under 2K, will give you the best MPG


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post #5 of 13 Old 12-23-2009, 08:30 AM
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When I tow 10k going 60mph I get better on 5th gear than 4th. 4th sits over 2k and 5th is arround 1700,1800
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post #6 of 13 Old 12-23-2009, 08:32 AM
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Quote:
Originally Posted by Galaxie View Post
My milage is there not so much at a specific RPM but when that little friendly boost gauge says down. Do 55-65mph with 3:73s and you will be good!
Where is your boost usually at while cruising at 65ish with no load?

2005 F350 SRW, Crew cab short bed Lariat FX4. 85k. BPD HD oil cooler setup, BPD EGR cooler, Scanguage monitor.


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post #7 of 13 Old 12-23-2009, 09:20 AM Thread Starter
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Ok i usually run at 2000 or below

Quote:
Originally Posted by Galaxie View Post
I found that with my tune I efficiently pass everyone around 3500-4000 RPM

My milage is there not so much at a specific RPM but when that little friendly boost gauge says down. Do 55-65mph with 3:73s and you will be good!
Yea mines pretty efficient at passing too when you kick the boost up to 30, always fun passing the sport cars screaming

2007 F250 Xlt 4wd
aFe stage 2 intake, 6" Aussie stacks, Sct X3 (Erics tunes)
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post #8 of 13 Old 12-23-2009, 09:24 AM
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if you can keep under 10 psi of boost you chould get the best milage

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post #9 of 13 Old 12-23-2009, 09:30 AM
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Originally Posted by Salebarn Rob View Post
if you can keep under 10 psi of boost you chould get the best milage
YUP
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post #10 of 13 Old 12-23-2009, 09:53 AM
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Quote:
Originally Posted by Salebarn Rob View Post
if you can keep under 10 psi of boost you chould get the best milage
Cool. Good info. I am used to my Grand National which does not "carry" boost while cruising. Big diff with this 6.0 PSD...

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