Evolkidbell

Badlands
Well-Known Member
First Name
Brian
Joined
Jul 17, 2020
Messages
110
Reaction score
158
Location
Northern Colorado
Vehicle(s)
1966 Bronco, 2013 F-150
Clubs
 
You can use the same springs and shocks to get different amounts of lift and travel. Bilstein does this on shocks with different settings for the spring perch. Increase preload, increase lift, decrease travel.
Increase pre-load, increase lift, decrease droop travel/increase jounce travel.
You're not limiting travel, just moving the static position.
I used to love reactions when people would ask if "I crank coilovers up to 2" of lift what size tire can I run?" ..."Technically anything that would fit at stock ride-height"

Details like spring length and rate would be nice to know, but I imagine we won't know that until people actually get their Bronco and start taking it apart. Ford isn't giving up much info on the subject right now.
Most OEMs won't provide spring rate of the stock suspension.
I worked with Toyota for years on an aftermarket basis and they wouldn't even give me that data.
If I had to take a wild guess, rate would be around 450 lb/in to 550 lb/in in the front.
Rear would be lower.





Advertisement

 
OP
Werkedperformance

Werkedperformance

Black Diamond
Well-Known Member
First Name
Mike
Joined
Jul 16, 2020
Messages
226
Reaction score
692
Location
Philthy
Vehicle(s)
03 FX4 Level 2
OP
Werkedperformance

Werkedperformance

Black Diamond
Well-Known Member
First Name
Mike
Joined
Jul 16, 2020
Messages
226
Reaction score
692
Location
Philthy
Vehicle(s)
03 FX4 Level 2
Well at least they provided a link to your thread as credit, not everyone does that.
I was looking for new intel from Bilsten and got directed to that.... I was like hey, wait a minute..... lol

how you been man?
 

North7

Badlands
Well-Known Member
Joined
Feb 21, 2020
Messages
4,560
Reaction score
14,755
Location
North Texas
Vehicle(s)
Bronco Badlands
Clubs
 
I was looking for new intel from Bilsten and got directed to that.... I was like hey, wait a minute..... lol

how you been man?
It just shows you still have the leading Bronco Bilsten intel.

I'm doing great, thank you, living the dream.
 

AcesandEights

Badlands
Well-Known Member
First Name
Ace!
Joined
Nov 19, 2020
Messages
925
Reaction score
1,724
Location
Oregon
Vehicle(s)
2016 or 2017 Ford
...
Most OEMs won't provide spring rate of the stock suspension.
I worked with Toyota for years on an aftermarket basis and they wouldn't even give me that data.
If I had to take a wild guess, rate would be around 450 lb/in to 550 lb/in in the front.
Rear would be lower.
Just saw this and thought, hmmm. Ford gives this out, at least on some vehicles. It's in their printed specs all the time.
 

AcesandEights

Badlands
Well-Known Member
First Name
Ace!
Joined
Nov 19, 2020
Messages
925
Reaction score
1,724
Location
Oregon
Vehicle(s)
2016 or 2017 Ford
@Evolkidbell

I don't think it's out for the Bronco yet; however, if you look at the body builder's guides for any of Ford's vehicles, it lists things that specific. For example (this is for the 2021 Ranger):

Spring Speciļ¬cations ā€” Front Coil
Model
Combined Rating @ Ground (lbs.)
Normal Working Height of Spring (in.)
Inside Dia. (in.)
Wire Dia. (in.)
Deflection Rate @ Ground (lbs. per in. ea.)

Cut and paste screwed up the formatting, so I deleted the numbers. I used it back in the day for my Super Duty to come up with suspension stuff I wanted to do, and knowing specifics about the axles for installing limited slip differentials

Interestingly enough, it lists the axle ratings for the Ranger which show the limited overall GVWR. Axle ratings are pretty low. I expect they're pretty low for the Bronco too.
 

Evolkidbell

Badlands
Well-Known Member
First Name
Brian
Joined
Jul 17, 2020
Messages
110
Reaction score
158
Location
Northern Colorado
Vehicle(s)
1966 Bronco, 2013 F-150
Clubs
 
@Evolkidbell

Deflection Rate @ Ground (lbs. per in. ea.)
Interesting as I've never seen this in older Builders Guides.
Typically they'd give a Load at a given height (wheel rate)
To get rate you would have to measure the free length of the spring, loaded length and back into it from the wheel rate.
Was always easier to pull the spring and rate test it.
Most IFS trucks are on the low (Tacoma) at 450 lb/in to around 600-650 lb/in (full size trucks)
SFA trucks would be quite a bit lower as the motion ratio is closest to 1:1.
IIRC the old Jeep Cherokees were close to 150lb/in.
 

AcesandEights

Badlands
Well-Known Member
First Name
Ace!
Joined
Nov 19, 2020
Messages
925
Reaction score
1,724
Location
Oregon
Vehicle(s)
2016 or 2017 Ford
Yeah, I think the coils I bought for my Jeep were close to 150, maybe 10% more or less.
 

MadMan4BamaNATL

Badlands
Well-Known Member
First Name
Ray
Joined
Jul 10, 2020
Messages
1,076
Reaction score
2,948
Location
Atlanta
Vehicle(s)
2019 BMW X3 2018 BMW 440i Soon: 21/22 Bronco 2DR
Clubs
 
https://www.musclecarsandtrucks.com...-sensitive-escv-shocks-explained-by-bilstein/

This turd played off my research for his own writing career. I'mma take that paycheck please.
I'm just discovering your thread and really appreciate the time and effort you put into doing the research and sharing with us. Not sure how in the heck I missed this.

Love how you went after that auto blog, as they should have said a little more.

You really should post more often. If you're bringing the high heat like this, I know you have much, much more to share and add perspective on. I know it drains time, but we're getting close to delivery and it's obvious you've got a lot to say and contribute.

Cheers! šŸŗ
 

Karl_in_Chicago

Badlands
Well-Known Member
Joined
Jul 19, 2020
Messages
726
Reaction score
1,713
Location
Chicago
Vehicle(s)
Corvette, Acura RL, H-D FLHTC
Nice pic's; there's a lengthy discussion on this, with video, here, that's pretty informative. Mods, you may want to merge. From the discussions with the drivers from the Moab ESJ event it sounds like the usual approach of ditching the stockers and going aftermarket ASAP might not be as advisable (or needed) with what Ford has engineered with their partners for the Bronco.
 

Advertisement





 
fifteen52


Advertisement
Top