Running an 80 with free wheel hubs (long)

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Hi Guys
Could someone explain how you get better fuel economy from disconecting the front hubs.drive shaft etc.
I would have thought that you would use the same or more because you are now driving the same weight vehicle with only one axle drive now.
Would this not require a little more power to it to move what the original two exels were moving to begin with.
How could you possible test this set up without the use of a race track testing centre because all it would take on a normal road is one more or less braking or acelleration and the figures would be off.
Or naybe im way off.
cheers
john 92HDJ 80 1HDT
 
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john byrne wrote:
The amount of energy needed to move the car will not change when
converting from 4wd to 2wd . The idea is that when just "half" the
drive-chain is rotating only "half" of the energy that is lost to.
friction in the drive-chain is "saved"
I'm no scientist, but I'm quite sure that you don't need more energy to
move the car when running as 2wd, but how much is saved I just don't know.
Well.. people that have done it, does say that they get better
fuel-economy .. some say around 10-15% .. but I don't know..
My 80 was born a 4x4 and i think I'll keep it that way ;)
--
Michael Thorsager, Denmark, http://gallery.vx80.dk
1997 VX80, 2.5" OME (and some other stuff)
 
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John
it will be too much work and costs to do HDJ80 2wd-it just doesn't make
sense.
if you wish so buy J7 series...
I think that permanent AWD has undisputable advantages...
cheers
Lubo
 
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