SPRING RATES & DROPS: ALL IN ONE THREAD!!

prem

Well-Known Member
Joined
Oct 12, 2016
Posts
80
Reaction score
3
Location
50266
First Name
Prem
Vehicle(s)
2015 Ecoboost Mustang PP Magnaflow Street
I called Eibach and they mentioned their eibach prokit is a linear springs and not progressive but the shared document says otherwise
 

dsp4848

Well-Known Member
Joined
Oct 26, 2014
Posts
386
Reaction score
107
Location
Austin, Texas
First Name
David
Vehicle(s)
2015 GT PP Magnetic

prem

Well-Known Member
Joined
Oct 12, 2016
Posts
80
Reaction score
3
Location
50266
First Name
Prem
Vehicle(s)
2015 Ecoboost Mustang PP Magnaflow Street
Yes i did mention that their website and the other vendors listed them as progressive but the person over the phone reconfirmed with the R&D guys who actually worked on it and he mentioned their sportline kit is progressive which i very evident from the pics
 

dsp4848

Well-Known Member
Joined
Oct 26, 2014
Posts
386
Reaction score
107
Location
Austin, Texas
First Name
David
Vehicle(s)
2015 GT PP Magnetic
Yes i did mention that their website and the other vendors listed them as progressive but the person over the phone reconfirmed with the R&D guys who actually worked on it and he mentioned their sportline kit is progressive which i very evident from the pics
Yeah, I always thought the Pro Kit looked linear and just took their word for it being progressive. Did he happen to say what the spring rates were?

If they are linear, that kind of seems like a big deal, since they are advertised everywhere as being progressive and I'm sure some people buy them for that reason. If one of their R&D guys said so, I would trust that more than a sales guy. Very interesting, I'd really like to know the true answer. Thanks for posting that bit of info! :thumbsup:
 

prem

Well-Known Member
Joined
Oct 12, 2016
Posts
80
Reaction score
3
Location
50266
First Name
Prem
Vehicle(s)
2015 Ecoboost Mustang PP Magnaflow Street
the rates are same as whats posted in this thread or anywhere.. Front: 200-314 lb / in. Rear: 800-914 lb / in
 

dsp4848

Well-Known Member
Joined
Oct 26, 2014
Posts
386
Reaction score
107
Location
Austin, Texas
First Name
David
Vehicle(s)
2015 GT PP Magnetic
Yeah, I agree with you that those are the advertised spring rates, but those would be for progressive spring rates. A linear spring rate should be a single number, not a range.
 

K-Roll302

Well-Known Member
Joined
May 20, 2014
Posts
786
Reaction score
336
Location
Southfield, MI
First Name
Karl
Vehicle(s)
'17 Mustang EB/PP, '80 Porsche 931(924 Turbo)
So I'm given to understand that the Ecoboost PP springs are linear, so there shouldn't be much of a noticeable difference in ride quality if I go with linear lowering springs then? Compared to if I were to go with progressive springs? I want the a spring that does better than the EBPP spring in performance but doesn't compromise too much on comfort.
 
Last edited:

prem

Well-Known Member
Joined
Oct 12, 2016
Posts
80
Reaction score
3
Location
50266
First Name
Prem
Vehicle(s)
2015 Ecoboost Mustang PP Magnaflow Street
Had the steeda progressive springs yesterday and very happy with the drop and stance of the car. I didn't see much difference in ride quality over my stock pp springs. I thought it was about as stiff as the stock ones or may be tad bit little less stiff.. Handling defintely improved
 

Niz55

Well-Known Member
Joined
May 10, 2015
Posts
3,676
Reaction score
1,249
Location
Us
Vehicle(s)
17 GT350
Change out the bmr handling to 1.6 -1.7 drop on the front. 1.2 is not accurate at all.
 

BmacIL

Enginerd
Joined
Sep 21, 2014
Posts
15,029
Reaction score
8,834
Location
Naperville, IL
Vehicle(s)
2015 Guard GT Base, M/T
Vehicle Showcase
1
Contact [email protected] for ride and handling setup consultation and personalized worksheets and data for your car and setup options.
 
Last edited:

DivineStrike

Doomsday
Joined
Jan 30, 2014
Posts
2,919
Reaction score
191
Location
Charleston
Vehicle(s)
15 GTPP, 11 F150 FX4, 07 CBR600RR
Does ride frequency change in relation to damper setting as well?
 

Rebellion

Well-Known Member
Joined
Aug 30, 2016
Posts
1,053
Reaction score
272
Location
Houston
Vehicle(s)
2016 Competition Orange GT
Does ride frequency change in relation to damper setting as well?
From the little I know of...no, at least not at this level of analysis. This analysis relates to the first order oscillations, dampers related to the second order.

On a first order, I'm not really clear on the implications of the actual ratio of front/rear frequencies, just don't let it be exactly equal or 1/1 (which is pretty much impossible in real life).

On a second order, as ride frequencies increase, it becomes less important to be super precise on the dampening being critical. Of course, you'll want it to be as close to critical as possible, but the reaction times are so short that, let's say, an 10% difference in dampening on a high ride frequency will be much less noticeable that at a low ride frequency.
 

BmacIL

Enginerd
Joined
Sep 21, 2014
Posts
15,029
Reaction score
8,834
Location
Naperville, IL
Vehicle(s)
2015 Guard GT Base, M/T
Vehicle Showcase
1
Does ride frequency change in relation to damper setting as well?
No, it is completely independent. Damper settings need to be matched to ride frequency, though.
 

Bahndvr

Roushcharged
Joined
Jul 4, 2014
Posts
1,235
Reaction score
150
Location
Germany
Vehicle(s)
'16 Roush Warrior Mustang
Vehicle Showcase
1
I didn't see it, does anyone know the spring rates(progressive or linear) of the Ford 2015-2017 Mustang Track Handling Pack?
 

Niz55

Well-Known Member
Joined
May 10, 2015
Posts
3,676
Reaction score
1,249
Location
Us
Vehicle(s)
17 GT350
I didn't see it, does anyone know the spring rates(progressive or linear) of the Ford 2015-2017 Mustang Track Handling Pack?
looks like progressive to me. But FRPP will not release the info on the rate.
 
 
46 - Roush Performance - 3
Top