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Excursion - King of SUVs 2000 - 2005 Ford Excursion

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  #76  
Old 02-05-2014, 10:04 AM
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With the superchip and the pretty big lift and tires at 50psi. I get around 14-15 mpg's but I'm not easy on her
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  #77  
Old 02-05-2014, 08:26 PM
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Quote:
Originally Posted by Jmatthews View Post

When you use a taller tire it throws the speedo off a bit showing lower mileage. I think taller tires may help on the highway some but hurt in the city.
That is part of it.
You are going faster now, which increases air resistance.
You are going farther than the odometer says, thus mpg "seems" lower.
Probably uses more fuel to get moving since effective gearing has changed, but it would be offset by better hiway economy from that new effective gearing.

Your city vs. Hiway ratio determines the net effect based on your driving.

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  #78  
Old 02-06-2014, 07:02 AM
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Rough guess, about 12-14 city, 16-17 Hwy. Then again, the beast has 10" of lift and 42" Interco's. I'll know more accurate numbers once I perform the hand calculations at the pump.

I have an SCT tune (Performance), 4 inch turbo back exhaust and CAI. I don't speed.
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  #79  
Old 02-06-2014, 07:06 AM
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Quote:
Originally Posted by Az_Ray View Post
With the superchip and the pretty big lift and tires at 50psi. I get around 14-15 mpg's but I'm not easy on her

If you do drive "normal" what mpg do you get? Reason I ask I may scale down my 42's to the 37's Goodyears in your sig.
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  #80  
Old 02-06-2014, 07:55 AM
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Quote:
Originally Posted by a11m1ghty View Post
If you do drive "normal" what mpg do you get? Reason I ask I may scale down my 42's to the 37's Goodyears in your sig.
Maybe 2 more mpg's. I'm thinking of switching to the Goodyear MTR a little better tire for what I do. Hopefully with not as much square blocks I'll get even more mpg's out of it.

But the MTR is almost double the price of what I can get MT for. I hoping the increase is enough to offset the price.
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  #81  
Old 02-06-2014, 04:45 PM
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The one recent trip I took on the freeway...topped off before I got on and topped off when I exited....21.5 mpg. Totally stock...63-70 mph.
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  #82  
Old 02-09-2014, 10:57 PM
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Hand calculated 17.4 mpg on my recent 630 mile highway trip at 73 mph. Around town I get 14-15 mpg.
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  #83  
Old 02-09-2014, 11:16 PM
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thronsonskip
best we ever seen on lie o meter was 22 or so, highway.

Is the muffler delete helping for mpg any? i never seen a reponse on that.

00 7.3 auto ex 4x4 stock tire size and stock wheels. stock height.
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Old 02-09-2014, 11:16 PM
 
 
 
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