Short bed Dually

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Sep 13, 2008 | 10:16 PM

#16

jpeters1

Senior User

Joined: Aug 2007

Posts: 156

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I have seen short bed duallies and they have the gas door on the fiber glass fenders also since the fenders cover it up.

Sep 14, 2008 | 09:22 AM

#17

podirtfarmer

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As I have read and researched there is not to much difference detween the 250 and the 350 rear diffs unless spec orders this truck has a nice posi in it now. and as the basics will tell more rubber on the street more traction. The engine has a Bully dog six position computer plus a Injector pressure chip Injectors are also set up for about a 120hp increase 4"down pipe 5" straight pipe exhaust Stage 3 cold air intake and Methaneole injection. The truck has not been Dynoed yet. the estimated HP is based on the math of the up grades. I am looking at building just a different truck that should run in the 11's at the strip. Cause there is nothing more fun than smoking car with a old diesel truck

Sep 14, 2008 | 01:25 PM

#18

Monsta

Sit. Stay.

Joined: Oct 2001

Posts: 18,308

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From: Washington State

There's quite a difference between the axle of an F-250 SRW and an F-350 DRW.

The SRW uses a Sterling.

The DRW uses a Dana 80. It is a much stronger axle by comparison.

Sep 14, 2008 | 06:55 PM

#19

bigrigfixer

The Pacifier

Joined: Jan 2003

Posts: 8,245

Likes: 7

From: Cloverdale, BC

Quote:

Originally Posted by podirtfarmer

The truck has not been Dynoed yet. the estimated HP is based on the math of the up grades.

Don't forget stickers add 50 hp each...

Sep 14, 2008 | 07:38 PM

#20

podirtfarmer

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No stickers on this ride no need to advertise also the comparison is between srw trucks

Sep 14, 2008 | 07:54 PM

#21

texastech_diesel

Token Redneck

Joined: Jun 2007

Posts: 9,335

Likes: 344

From: Breckenridge, TX

Quote:

Originally Posted by podirtfarmer

As I have read and researched there is not to much difference detween the 250 and the 350 rear diffs

Thers IS a difference though. The 250 has a 35 spline shaft and the 350 has a 37, its just a touch bigger too. Figured I'd post up the numbers, it's enough to rate the truck differently I suppose. Read: https://www.ford-trucks.com/forums/5...-and-f350.html

And here's even more about the differences between a 250 and 350. Just copied this guys post over.

Quote:

Originally Posted by CAFordDude

https://www.ford-trucks.com/forums/4...d-an-f350.html

https://www.ford-trucks.com/forums/4...ifference.html

https://www.ford-trucks.com/forums/5...psd-value.html

https://www.ford-trucks.com/forums/5...ifference.html

https://www.ford-trucks.com/forums/4...0-or-f450.html

https://www.ford-trucks.com/forums/4...-and-f350.html

https://www.ford-trucks.com/forums/4...fferences.html

https://www.ford-trucks.com/forums/4...-srw-f350.html

Sep 14, 2008 | 08:36 PM

#22

texastech_diesel

Token Redneck

Joined: Jun 2007

Posts: 9,335

Likes: 344

From: Breckenridge, TX

Wait your profile says 1999. Totally different book than the new SDs. I was in the mindset that you were running a newer PSD.

If it's a 1999.5 and up its a Sterling 10.5", no difference between the 250 and 350. Not sure when they changed stuff?

What engine are you running? 7.3 DI?

Sep 15, 2008 | 06:01 AM

#23

podirtfarmer

Thread Starter

New User

Joined: Aug 2008

Posts: 6

Likes: 0

Yes no cats no muffler

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Sep 15, 2008 | 07:02 PM

#24

King of the Road 04

Senior User

Joined: Jul 2004

Posts: 375

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From: W. Philly Burbs

Quote:

Originally Posted by Monsta

Sorry...that's isn't correct either.

You have no traction in the snow because snow doesn't offer the friction coefficient of asphalt! If if had the same friction then a dually would have the same traction. Dually's have higher flotation in snow and rain but that can be offset (to a degree) by having weight over the wheels.

The larger the tire's contact patch, the larger the area of friction, hence the more available area for traction. Tread design, the friction coefficient of the road surface, weight displaced all have bearing on available traction.

Obviously snow doesn't have the same friction coefficient as asphalt, believe me Ive found out on more than one occasion.

Not to bust anyones gonads, but isn't higher flotation directly related to the size of the tire/tires contact patch area? I mean, why would Tanks need larger and larger tracks in order to offset their increased weights, why would off road trucks (HEMITTS and the like) have extra large wide tires?

Tire design is of the utmost importance, but so is tire sizing depending on the situation at hand.

And again, I know I'm comparing apples and oranges, but look at the the difference in tire size on a WRC Rally Car, let alone tire design, depending on the conditions of the track.