Brake size and stopping power F350 vs F450 - Diesel Forum - TheDieselStop.com
Ford Diesel Forum / Powerstroke Forum
Ford Diesel Forum / Powerstroke Forum
Go Back   Diesel Forum - TheDieselStop.com > 2008-2010 Ford Super Duties > 2008- 2010 General Questions

2008- 2010 General Questions General questions related to 2008-Up Super Duty trucks. If it doesn't fit the other categories, post it here. Gas engine discussion that pertains to all models is allowed. Specific gas engine questions should use the Gas Engines forum.

TheDieselstop.com is the premier Diesel Truck Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 08-05-2008, 05:57 PM   #1 (permalink)
Senior Member
 
2x6 Bulldog's Avatar
 
Join Date: Feb 2001
Location: Buford, GA, USA
Posts: 692
My Photos: (0)
Feedback Score: 0 reviews
Brake size and stopping power F350 vs F450

The truck guy at the dealer told me that the '08 F350 and F450 have the same size brake rotors and stopping power and the 610 lbs. or so added weight of the F450 would make it a little harder to stop. However the '08 brakes are larger than my 99.5.

Any brake experts out there? I was thinking the 2008 F450 would have heavier duty brakes than a 2008 F350.

Also I'm debating new '08 at a great price. I tow a 13.5k fiver and can't decide between a
F450 with 4.30 rear end
F350 with 3.73 rear end
F350 with 4.10 rear end
Which would tow best with best fuel mileage?
__________________
2008 F450 DRW CC LWB 4x4 Off Road, Lariat, Oxford White, 4.30 LS rear end, Navigation, audiophile stereo, Memory package seats, heated seats, heated mirrors, warmup heat option, power back window, traction control system, backup alarm, rear DVD with wireless headphones.
2x6 Bulldog is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 08-05-2008, 10:38 PM   #2 (permalink)
Lifetime Supporting Member
 
SmokeyWren's Avatar
 
Join Date: Apr 1999
Location: Midland County,TX, USA
Posts: 18,799
My Photos: (44)
Feedback Score: 0 reviews
Quote:
Originally Posted by 2x6 Bulldog View Post
The truck guy at the dealer told me that the '08 F350 and F450 have the same size brake rotors and stopping power ...
He's an idiot. Find someone else to talk to.

As one example, per the 2008 SuperDuty brochure, the rear rotor on F-350 DRW is 13.39". Rear rotor on F-450 pickup is 15.35" diameter. So that's not exactly the "same size rotors and stopping power".

Other specs such as swept area and pad size also show the F-450 brakes are quite a bit heavier-duty than the brakes on the F-350 DRW.

Quote:
Which would tow best with best fuel mileage?
Depends on your load. Buy "enuff truck" for your load, but buying too much truck for your load wastes fuel.

If your load always grosses less than 20k pounds GCW, then get the F-350 SRW with 3.73. If your load sometimes grosses up to 23k GCW, then get the F-350 DRW with 4.10. If your load sometimes grosses up 26k GCW, you need the F-350 DRW TowBoss with 4.30. If your load sometimes grosses above 26k GCW, then you need the F-450 with 4.30 rear axle ratio.

If your load will never gross over 26k GCW, then it's silly to buy the F-450. But if your load will ever be more than 26k, then it's silly to buy anything less.
__________________

My Sierra Blanca in the sig pic was a great pickup for 11.5 years. I sold it a coupla years ago. I drove a hand-me-down 2003 F-150 SuperCrew 4.6L 2V for a while, but it was unacceptable for towing more than a rowboat. Replacement is a 2012 F-150 EcoBoost SuperCrew Lariat that tows my 5,000-pound TT like a dream.

Last edited by SmokeyWren; 08-05-2008 at 10:52 PM.
SmokeyWren is offline   Reply With Quote Quick reply to this message
Old 08-06-2008, 09:55 AM   #3 (permalink)
Senior Member
 
2x6 Bulldog's Avatar
 
Join Date: Feb 2001
Location: Buford, GA, USA
Posts: 692
My Photos: (0)
Feedback Score: 0 reviews
Thanks Smokey,
I thought this guy had some super secret brake information. Duh I could've found that if I had looked hard enough.

Bigger brakes is the one of the biggest reasons for wanting a F450 over the F350. I would love the extra stopping power. With the price of fuel my truck is used only for towing my 13.5 k fifth wheel. I just wanted a bigger safety factor that a F450 would give.

I think I really need the 4.10 rear end with my gross weight.

Thanks again for your information.
__________________
2008 F450 DRW CC LWB 4x4 Off Road, Lariat, Oxford White, 4.30 LS rear end, Navigation, audiophile stereo, Memory package seats, heated seats, heated mirrors, warmup heat option, power back window, traction control system, backup alarm, rear DVD with wireless headphones.
2x6 Bulldog is offline   Reply With Quote Quick reply to this message
Old 08-06-2008, 12:57 PM   #4 (permalink)
Lifetime Supporting Member
 
SmokeyWren's Avatar
 
Join Date: Apr 1999
Location: Midland County,TX, USA
Posts: 18,799
My Photos: (44)
Feedback Score: 0 reviews
Quote:
Originally Posted by 2x6 Bulldog View Post
I think I really need the 4.10 rear end with my gross weight.
13.5k for the trailer plus 9k for the tow vehicle is 22.5k GCW. The F-350 DRW with 23,000 GCWR and 4.10 Dana 80 rear axle is available for that application, but you won't have any "wiggle room" for your better half to haul back those pretty rocks she saw 1,000 miles from home. I'd get the F-350 DRW with the TowBoss and 4.30 rear end for that load. But If you like the idea of the bigger brakes, then go for the F-450, even though it's overkill for that trailer. And it's not available with 4.10 rear end.
SmokeyWren is offline   Reply With Quote Quick reply to this message
Old 08-06-2008, 04:35 PM   #5 (permalink)
Senior Member
 
Engine31's Avatar
 
Join Date: Oct 2007
Location: Phx, AZ
Posts: 225
My Photos: (9)
Feedback Score: 0 reviews
I like the idea of buying more then I need. I've never been disapointed that way, and have been glad I did it in a couple of cases.
__________________
F450 Lariat 4X4, red, 4.88's, everything but the moonroof, S & B Intake, Banks exhaust, Amsoil.
Engine31 is offline   Reply With Quote Quick reply to this message
Old 08-08-2008, 04:12 PM   #6 (permalink)
Member
 
Join Date: Feb 2008
Location: Centennial, CO
Posts: 43
My Photos: (0)
Feedback Score: 0 reviews
The brakes are a high point, they really work. Here is a comparison to my F350:

2002 F350 gross lining area rear 34.72 Total swept area per axle rear 244.81
2002 F350 gross lining area front 49.60 Total swept area per axle front 264.48
2002 F350 rotor dia. Rear 12.83
2002 F350 rotor dia front 13.03


2008 F450 gross lining area rear 55.6 Total swept area per axle rear 361.9
2008 F450 gross lining area front 55.6 Total swept area per axle front 337.2
2008 F450 rotor dia. Rear 15.35
2008 F450 rotor dia. Front 14.53
__________________
2008 F450 PU 6.4, 4.30 gear
2008 Snowriver 108 truck camper
2005 Jeep Rubicon Unlimited
Clattertruck is offline   Reply With Quote Quick reply to this message
Old 08-09-2008, 06:56 PM   #7 (permalink)
Senior Member
 
Join Date: Jul 2001
Location: McHenry, IL
Posts: 355
My Photos: (1)
Feedback Score: 0 reviews
Wow..... Rears bigger than the fronts. Never heard of such a thing.

I'm borderline between a SRW and a DRW, but I've decided that if I go dually I'm getting the 450. I know it's prolly overkill, but it's not much more money for the bigger wheels/tires and brakes.
__________________

2002 F-350 PSD, CC, LWB, SRW, 4x4, Lariat, Auto, 3.73 LS, DSG + Flint 40/20/40 + Line-X. VDH2 pcm code.

Last edited by Dano959; 08-09-2008 at 06:58 PM.
Dano959 is offline   Reply With Quote Quick reply to this message
Old 08-09-2008, 09:05 PM   #8 (permalink)
Lifetime Supporting Member
 
SmokeyWren's Avatar
 
Join Date: Apr 1999
Location: Midland County,TX, USA
Posts: 18,799
My Photos: (44)
Feedback Score: 0 reviews
Quote:
Originally Posted by Dano959 View Post
Wow..... Rears bigger than the fronts. Never heard of such a thing.
Then you never heard of a real truck?

For example, the 2006 F-650 with optional air brakes has front brake drums 15" diameter x 4" wide. But the rear drums are 16.5"x7".

Because the max weight on the front axle is 8,500 pounds, but the max weight on the rear axle is 13,500 pounds. It takes bigger brakes to stop 13,500 pounds than it does to stop 8,500 pounds.
SmokeyWren is offline   Reply With Quote Quick reply to this message
Old 08-09-2008, 09:31 PM   #9 (permalink)
Senior Member
 
fireguywtc's Avatar
 
Join Date: Jun 2008
Location: central tx
Posts: 539
My Photos: (4)
Feedback Score: 0 reviews
[/quote]Bigger brakes is the one of the biggest reasons for wanting a F450 over the F350. I would love the extra stopping power. With the price of fuel my truck is used only for towing my 13.5 k fifth wheel. I just wanted a bigger safety factor that a F450 would give.

I think I really need the 4.10 rear end with my gross weight.

Thanks again for your information.[/quote]

Some food for thought. You might end up dollars ahead buying a F350 they way you want it and upgrading the brakes. There are some killer aftermarket brakes out there that greatly increase brake capacity.
__________________
2012 F350 Lariat ultimate 6.7 PSD LB CC SRW Fx4,
67 F-250 Project truck, currently in a billion pieces
70 F-250 4x4 (highboy)
Past trucks: 07 F-350 xlt 6.0 PSD LB CC SRW 4x4, black on tan, A/T, 5" exhaust w/4" downpipe, SCT livewire Traded in 04 F-250 xlt 6.0 PSD SB extcab 4x4, 6spd, all stock and 97 F-250HD xlt 7.3 PSD extcab LB 4x4, 5spd, Superchips tuner, 4" turbo back exaust, K&N CAI, 02 intercooler installed, Sold

Last edited by fireguywtc; 08-09-2008 at 09:49 PM.
fireguywtc is online now   Reply With Quote Quick reply to this message
Old 08-10-2008, 12:20 PM   #10 (permalink)
Senior Member
 
2x6 Bulldog's Avatar
 
Join Date: Feb 2001
Location: Buford, GA, USA
Posts: 692
My Photos: (0)
Feedback Score: 0 reviews
Thanks Smokey and the rest!

I bought it and so far I love it! See signature.

Now for a hitch. Maybe Reese this time. Mo' money!

Thanks guys!
__________________
2008 F450 DRW CC LWB 4x4 Off Road, Lariat, Oxford White, 4.30 LS rear end, Navigation, audiophile stereo, Memory package seats, heated seats, heated mirrors, warmup heat option, power back window, traction control system, backup alarm, rear DVD with wireless headphones.
2x6 Bulldog is offline   Reply With Quote Quick reply to this message
Old 08-31-2008, 11:38 PM   #11 (permalink)
Senior Member
 
Join Date: Oct 2001
Location: Republic of Texas
Posts: 577
My Photos: (0)
Feedback Score: 0 reviews
Quote:
Originally Posted by Engine31 View Post
I like the idea of buying more then I need. I've never been disapointed that way, and have been glad I did it in a couple of cases.
And you give yourself room for more trailer in the future.

Tom
__________________
02 CC XLT Dually 4x2, PSD w/6 spd, White w/Med Flint 40/20/40, TTT Mirrors, 4.10 L/S, PCM=AEB4, Receiver, Cab Steps, Homelink X Visor, Husky F&R Mud Flaps, AIS Ford Filter, WD Pyro & Boost in A-pillar, Line-X, Hutch Tank Mod, Pre-Pump Racor 645R30, 4" Banks Monster Exhaust, Mag-Hytec Diff Cover, Amsoil in Tranny & Diff.
Bye-bye 99 diesel-sucking automatic!!!
tomshep is offline   Reply With Quote Quick reply to this message
Old 08-31-2008, 11:40 PM   #12 (permalink)
Senior Member
 
Join Date: Oct 2001
Location: Republic of Texas
Posts: 577
My Photos: (0)
Feedback Score: 0 reviews
Quote:
Originally Posted by 2x6 Bulldog View Post
The truck guy at the dealer told me that the '08 F350 and F450 have the same size brake rotors and stopping power and the 610 lbs. or so added weight of the F450 would make it a little harder to stop. However the '08 brakes are larger than my 99.5.

Any brake experts out there? I was thinking the 2008 F450 would have heavier duty brakes than a 2008 F350.

Also I'm debating new '08 at a great price. I tow a 13.5k fiver and can't decide between a
F450 with 4.30 rear end
F350 with 3.73 rear end
F350 with 4.10 rear end
Which would tow best with best fuel mileage?
One of the experts on here can probably answer this with certainty. I recall reading calculations and after factoring in the ratios and tire sizes the 450 w/4.30s is nearly identical to a 350 w/4.10s due to the tires heights.

Tom
__________________
02 CC XLT Dually 4x2, PSD w/6 spd, White w/Med Flint 40/20/40, TTT Mirrors, 4.10 L/S, PCM=AEB4, Receiver, Cab Steps, Homelink X Visor, Husky F&R Mud Flaps, AIS Ford Filter, WD Pyro & Boost in A-pillar, Line-X, Hutch Tank Mod, Pre-Pump Racor 645R30, 4" Banks Monster Exhaust, Mag-Hytec Diff Cover, Amsoil in Tranny & Diff.
Bye-bye 99 diesel-sucking automatic!!!
tomshep is offline   Reply With Quote Quick reply to this message
Old 09-22-2008, 06:28 PM   #13 (permalink)
Senior Member
 
Wobblin-Goblin's Avatar
 
Join Date: Feb 2005
Location: Eastern CT
Posts: 1,409
My Photos: (0)
Feedback Score: 0 reviews
Interesting thread. I wouldn't have thought that a pickup would have bigger brakes in the rear.

Learn something new every day.
__________________
2003 F-350 SRW XLT 7.3L 4R100 PSD 4x4 Supercab SB 3.73
1994 Dodge 3500 SLT Dually 5.9L Cummins NV4500 5spd US Gear "splitter" Exhaust brake 4x4
RETIRED: 1985 Chevy K20 6.2L Turbo-400 3spd auto 4x4 4.10
2003 Ford Explorer XLT 4.0L V-6 5-spd auto 4wd 3.55
NRA Life member
Wobblin-Goblin is offline   Reply With Quote Quick reply to this message
Old 09-22-2008, 06:51 PM   #14 (permalink)
Member
 
Join Date: Sep 2008
Location: CA
Posts: 73
My Photos: (0)
Feedback Score: 0 reviews
Quote:
Originally Posted by Wobblin-Goblin View Post
Interesting thread. I wouldn't have thought that a pickup would have bigger brakes in the rear.

Learn something new every day.
It's because the maximum weight allowed on the front axle is 8,500 pounds, but the maximum weight on the rear axle is about 5,000lbs more.

Ad regards the bigger brakes, I'd agree with another poster who said if you get a great deal on a 350 dually then just get some high quality aftermarket brakes. I'm planning to do that with my SRW Super duty and just wish Ford offered a big brake upgrade kit from the factory. 450 brakes will do the job but will need to overcome certain fitment issues re lug bolts etc. When I have loved ones in the car I want the biggest brakes that will fit behind my 20s as 8,000lbs take a lot of stopping at 75mph.

Last edited by Carl Lassiter; 09-23-2008 at 10:35 AM.
Carl Lassiter is offline   Reply With Quote Quick reply to this message
Old 09-24-2008, 08:42 AM   #15 (permalink)
Senior Member
 
Harley350's Avatar
 
Join Date: Feb 2008
Location: Ft. Lauderdale, FL
Posts: 284
My Photos: (0)
Feedback Score: 0 reviews
Are the breaks on a 2008 F250 the same as a 2008 F350?
Harley350 is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

  Diesel Forum - TheDieselStop.com > 2008-2010 Ford Super Duties > 2008- 2010 General Questions

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Diesel Forum - TheDieselStop.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



Wheel & Tire Center

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 09:13 PM.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.