|
|
09-28-2009, 02:37 PM
|
#11
|
Senior Member
Join Date: May 2007
Location: Washington - Ridgefield
Posts: 4,728
|
Re: Rear brake upgrade
Quote:
Originally Posted by j.whitbread
Technically the front brakes are upgraded from stock 07 E350 simply due to the front Dana 60, hence the 17 inch wheels to accommodate the bigger brakes.
I'll have to find a Ford dealer willing to sit down and go over parts. Maybe an 07 E450 would work better than the 08 parts. It will take some homework.
|
The 350 and 450 have different wheels and bolt patterns. 450 is 10 bolt dually wheels. Stick with the 350 non-dually unless you really want to spend alot of money.
Mike
__________________
Alaska to Key West, Labrador and more
Prostate cancer survivor. See Thread Prostate cancer and Sportsmobiles
2015 VW GTI 2020 Fiat 124 Spider
2012 E250 Hitop camper
|
|
|
09-28-2009, 09:28 PM
|
#12
|
Senior Member
Join Date: Jan 2009
Location: Corvallis, OR
Posts: 5,300
|
Re: Rear brake upgrade
[quote=Ford_6L_E350]
Quote:
Originally Posted by "j.whitbread":1oe28wl4
Technically the front brakes are upgraded from stock 07 E350 simply due to the front Dana 60, hence the 17 inch wheels to accommodate the bigger brakes.
I'll have to find a Ford dealer willing to sit down and go over parts. Maybe an 07 E450 would work better than the 08 parts. It will take some homework.
|
The 350 and 450 have different wheels and bolt patterns. 450 is 10 bolt dually wheels. Stick with the 350 non-dually unless you really want to spend alot of money.
Mike[/quote:1oe28wl4]
The E350 and E350 have the exact same bolt pattern and wheels. (8 x 6.5")
__________________
2000 E450 dually V10 wagon
|
|
|
09-28-2009, 09:32 PM
|
#13
|
Senior Member
Join Date: Jan 2009
Location: Corvallis, OR
Posts: 5,300
|
Re: Rear brake upgrade
Quote:
Originally Posted by SheepShagger
If you come even close to 50/50, it's very unstable braking at speed, since it's so easy to lock the rear vs front. Clever proportional brake valves will increase the rear % depending on the load (usually gauged by how much sag in the rear suspension), but the Ford van doesn't have this.
|
I'm pretty sure I am at 50% or greater rear brake bias when towing heavy, based on pad life considering the rear brake pads have more swept area (slightly). Remember this braking system is used on very rear-heavy cutaway chassis, so in rear heavy applications more rear brake bias is needed. Maybe next time I'm towing I'll trow some rotor temp paint and compare.
Brake bias is controller electronically through the ABS system. The system measure minute differences in wheel speed and adjusts the brake bias accordingly. Much more accurate than a old style proportioning valve. So yes, the Ford vans do have that.
__________________
2000 E450 dually V10 wagon
|
|
|
09-28-2009, 11:09 PM
|
#14
|
Senior Member
Join Date: May 2007
Location: Washington - Ridgefield
Posts: 4,728
|
Re: Rear brake upgrade
You're right, I was stuck in F-Series land.
Mike
__________________
Alaska to Key West, Labrador and more
Prostate cancer survivor. See Thread Prostate cancer and Sportsmobiles
2015 VW GTI 2020 Fiat 124 Spider
2012 E250 Hitop camper
|
|
|
09-29-2009, 08:34 PM
|
#15
|
Senior Member
Join Date: Apr 2009
Posts: 453
|
Re: Rear brake upgrade
Quote:
Originally Posted by carringb
Quote:
Originally Posted by SheepShagger
If you come even close to 50/50, it's very unstable braking at speed, since it's so easy to lock the rear vs front. Clever proportional brake valves will increase the rear % depending on the load (usually gauged by how much sag in the rear suspension), but the Ford van doesn't have this.
|
I'm pretty sure I am at 50% or greater rear brake bias when towing heavy, based on pad life considering the rear brake pads have more swept area (slightly). Remember this braking system is used on very rear-heavy cutaway chassis, so in rear heavy applications more rear brake bias is needed. Maybe next time I'm towing I'll trow some rotor temp paint and compare.
Brake bias is controller electronically through the ABS system. The system measure minute differences in wheel speed and adjusts the brake bias accordingly. Much more accurate than a old style proportioning valve. So yes, the Ford vans do have that.
|
I can't talk for your van or setup, but ABS has absolutely zero effect on brake bias, until the whole unit kicks in. ABS just reads different wheel speed and adjusts brakes accordingly. So until one or two wheels slip / skid / change speed from the other wheels it can't tell any change and will not change the brake bias. The ABS on the van is not changing a thing unless you feel the ABS pulsating through the brake pedal.
|
|
|
09-30-2009, 02:04 PM
|
#16
|
Senior Member
Join Date: Jan 2009
Location: Corvallis, OR
Posts: 5,300
|
Re: Rear brake upgrade
Yes, under minor wheel slip, it will reduce rear brake pressure without pulsing the brakes. On older disc brake vans, it would only reduce pressure without actually pulsing.
When you stop, it you feel a faint click in the brake pedal, that's the rear pressure being reduced.
__________________
2000 E450 dually V10 wagon
|
|
|
|
|
Thread Tools |
|
Display Modes |
Linear Mode
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
» Recent Threads |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|