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Old 12-07-2011, 10:54 PM   #21 (permalink)
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wow this is nice!

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Old 12-08-2011, 01:06 AM   #22 (permalink)
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Old 12-08-2011, 03:40 AM   #23 (permalink)
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Originally Posted by kach22i View Post
Dude, great minds think alike - I did the same thing two years ago on my S-10. Picked up 3-mph hwy.

Link:
Chin Spolier - fast/easy/cheap/effective - Pelican Parts Technical BBS


I did hit a snow drift (spun) this last winter when I went on to a side street and touched the gas coming out of the turn. I was trying to save gas keeping it out of 4WD, not always a smart thing to do. I now have a crack in the plastic chin valance above my home garden chin spoiler (in one corner). I still have to fix it, helps that the truck is all black, I forget it's even cracked.
2WD instead of 4WD doesn't save gas. All the same drivetrain parts are spinning, except it's the road spinning them.
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Old 12-08-2011, 04:30 AM   #24 (permalink)
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Originally Posted by winkosmosis View Post
2WD instead of 4WD doesn't save gas. All the same drivetrain parts are spinning, except it's the road spinning them.
If this were true, why would companies even bother with optional 4WD? Why not just make all their trucks permanent 4X4's?
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Old 12-08-2011, 07:37 AM   #25 (permalink)
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Quote:
Originally Posted by winkosmosis View Post
2WD instead of 4WD doesn't save gas. All the same drivetrain parts are spinning, except it's the road spinning them.
That is a nice theory, but in real world practice (on my truck) I can tell you that 4WD eats a very noticeable amount more of gas.

Off the top of my head, I lose about 3 mpg in 4WD.

When your are only getting 18 mpg hwy, and 13 mpg city this can add up quickly.

Lets say I average 15 mpg half/half, 12 mpg is way too low for me.
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Chin Spoiler:
http://forums.pelicanparts.com/off-t...effective.html

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http://forums.pelicanparts.com/off-t...xperiment.html

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http://ecomodder.com/forum/showthrea...1-a-19525.html
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Old 12-08-2011, 01:48 PM   #26 (permalink)
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Originally Posted by Sven7 View Post
If this were true, why would companies even bother with optional 4WD? Why not just make all their trucks permanent 4X4's?
The trucks with part time 4WD usually have a 4WD mode where the front and rear axles are locked together. You should only use it on loose surfaces, not on dry, wet, or icy roads.
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Old 12-08-2011, 01:48 PM   #27 (permalink)
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Quote:
Originally Posted by kach22i View Post
That is a nice theory, but in real world practice (on my truck) I can tell you that 4WD eats a very noticeable amount more of gas.

Off the top of my head, I lose about 3 mpg in 4WD.

When your are only getting 18 mpg hwy, and 13 mpg city this can add up quickly.

Lets say I average 15 mpg half/half, 12 mpg is way too low for me.

Is it because your front and rear axles are locked together and scrubbing during turning?
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Old 12-08-2011, 01:54 PM   #28 (permalink)
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The 4WD stuff does add weight and usually a taller, dirtier aero profile. And even in 2WD mode there's more drivetrain stuff spinning even if it's only in the transfer case- a larger drivetrain loss.
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Old 12-08-2011, 01:59 PM   #29 (permalink)
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Originally Posted by Frank Lee View Post
The 4WD stuff does add weight and usually a taller, dirtier aero profile. And even in 2WD mode there's more drivetrain stuff spinning even if it's only in the transfer case- a larger drivetrain loss.
But it's not just the transfer case. The front axles and driveshaft still spin in 2WD, it's just that the tires are turning them instead of the engine.
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Old 12-08-2011, 02:00 PM   #30 (permalink)
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Quote:
Originally Posted by winkosmosis View Post
The trucks with part time 4WD usually have a 4WD mode where the front and rear axles are locked together. You should only use it on loose surfaces, not on dry, wet, or icy roads.
People use 4WD in the snow and wet roads all the time, which is why such trucks exist in the marketplace. To say never use it unless on loose surfaces may be correct, but not realistic in my opinion.

I limit my 4WD use as much as possible, two sand tubes over the rear axle helps.

My multiple aerodynamic improvements; front chin spoiler, roof cab wing, and rear spoiler all help to keep her on the road at speed.

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George
Architect, Artist and Designer of Objects

1977 Porsche 911s Targa
1998 Chevy S-10 Pick-Up truck
1989 Scat II HP Hovercraft

Chin Spoiler:
http://forums.pelicanparts.com/off-t...effective.html

Rear Spoiler Pick Up Truck
http://forums.pelicanparts.com/off-t...xperiment.html

Roof Wing
http://ecomodder.com/forum/showthrea...1-a-19525.html
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