FordExcursions.com Forums
Scott McNabb
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• Lubbock, TX, USA |
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• Registered on 10/5/2003 |
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• 9 posts |
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 Posted:9/3/2005 23:20 |
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Any one here have an aftermarket overdrive unit installed? What would a 30% overdrive at 70 mph cruise translate to in mpg increase? I currently get 15 to 16 on trips with the V10 |
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E. Long
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• Subscriber since 1/1/2001 |
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• Atlanta, GA, USA |
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• Registered on 1/23/2001 |
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• 2,229 posts |
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Posted:9/3/2005 23:58 |
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| Quote: | | Any one here have an aftermarket overdrive unit installed? What would a 30% overdrive at 70 mph cruise translate to in mpg increase? I currently get 15 to 16 on trips with the V10 |
Essentially, it will lower your RPM by 30%. Try driving at highway speeds at 30% lower RPM and see what your mileage is. This would be the best indication of what you can expect. I would also anticipate a loss in horsepower due to the additional component in the drivetrain (no idea how much, though). I would imagine the increase in fuel economy would negate the loss in HP.
Gear Vendors also makes a similar product. http://www.gearvendors.com
-Eric
'67 Galaxie 500 - 390 FE, .030" over, FE to AOD adapter, disc brake conversion. The Daily Driver.
'00 Excursion - 7.3L PSD, LANDYOT Gen-II Radius Rods, Factory Tech Valve Body, 200K+ miles and going |
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JohnBoy
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• DFW, TX, USA |
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• Registered on 9/3/2002 |
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• 972 posts |
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Posted:9/4/2005 08:39 |
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Hi Scott....
You may get some mpg improvement, but at what cost ?
I wonder if it is just like buying a 3-400 dollar tuner, it can get you some mpg help, but will probably take a VERY long time to recover that initial investment....
Not sure how much an overdrive unit is, but let's say $1000 for our discussion...
How long is the return on investment of that $1000 and are you going to keep the bus that long ?
Just like trading in our buses for a more fuel effecient one,
there's some economic considerations NOT to do it as well 
I mean, if I get $10,000 for my $30,000 bus.... I can buy a lot of fuel for $20,000 
so there's more to figure than just the mpg increase...
2005 6.0L 4x4 Eddie Bauer Ex
2003 6.0L 4x4 Limited Ex - traded in (BooHoo )
"The Republicans should back off and let men marry men, women marry women, and legalize abortion. In three generations there would be no Democrats." |
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Scott McNabb
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• Lubbock, TX, USA |
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• Registered on 10/5/2003 |
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• 9 posts |
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Posted:9/8/2005 22:09 |
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Thanks, Eric and Johnboy. I think I will just enjoy riding in style and pay a little extra for the safety, comfort, and power. |
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