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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Suspension | Brakes | Chassis > Swift Sport Springs!



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      09-06-2013, 03:56 AM   #89
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Quote:
Originally Posted by lafuerza View Post
Would you stop there or are there other M3 pieces to add since the car is apart already. M3 sway bar or anything in the rear? Don't want to go back to the drawing board later.
M3 subframe bushings. I'd leave the sway bars alone
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      09-09-2013, 06:22 PM   #90
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will the swift r spec drop so low that it looks slammed? Currently have sport suspension.

planning on changing bump stops.

m3 rear bushings I am torn on due to the big install hit.
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      09-09-2013, 06:24 PM   #91
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No it will be like eibach pro kits. Search for images of those.
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      09-09-2013, 06:54 PM   #92
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Quote:
Originally Posted by lafuerza View Post
will the swift r spec drop so low that it looks slammed? Currently have sport suspension.

planning on changing bump stops.

m3 rear bushings I am torn on due to the big install hit.
Here are the specs:

335i lowering:

1" in the front and 0.8" in the rear.

Spring rates:

-4kg/mm or 223 lb/in in the front

-11kg/mm or 615 lb/in in the rear
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      09-10-2013, 12:18 PM   #93
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Quote:
Originally Posted by HP Autosport View Post
Here are the specs:

335i lowering:

1" in the front and 0.8" in the rear.

Spring rates:

-4kg/mm or 223 lb/in in the front

-11kg/mm or 615 lb/in in the rear
What shock would you pair with these springs?

These springs are linear correct?
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      09-10-2013, 12:41 PM   #94
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Quote:
Originally Posted by jwt67 View Post
What shock would you pair with these springs?

These springs are linear correct?
Yes, Swift Spec-R's are linear. Koni Sport Yellows.
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      09-10-2013, 04:13 PM   #95
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So 1" front drop from non-sport stock? That's 25mm. Will be pairing with Koni Yellows.
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      10-03-2013, 04:07 PM   #96
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Quote:
Originally Posted by lafuerza View Post
So 1" front drop from non-sport stock? That's 25mm. Will be pairing with Koni Yellows.
Yes, from non-sport height.
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      05-07-2014, 09:26 AM   #97
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Quote:
Originally Posted by HP Autosport View Post
Here are the specs:

335i lowering:

1" in the front and 0.8" in the rear.

Spring rates:

-4kg/mm or 223 lb/in in the front

-11kg/mm or 615 lb/in in the rear
How do these compare to the Eibach Pro Kit Springs?
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      05-07-2014, 11:19 AM   #98
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Quote:
Originally Posted by Hierlevelz View Post
How do these compare to the Eibach Pro Kit Springs?
Eibach Pro Kit spring rates are lower. The "spring rate" sticky shows their rates, compare to what HP Autosport shows.
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      05-07-2014, 11:45 AM   #99
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Quote:
Originally Posted by Hierlevelz View Post
How do these compare to the Eibach Pro Kit Springs?
Is it safe to say that a progressive spring like Eibach Pk's will "sag" and be "softer" overtime beacuse of its progressive nature as opposed to a linear spring like Swift Spec R's? I am having some wheel fender clearance issues and my thought process is if I swap from Eibachs to Spec R's I can regain some additional ride height and alleveiate my rubbing issues. Swift does market their spring as having a 1.0"/0.8" lowering height front to rear on the 335i vs. Eibachs 1.4"/1.0".
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      05-07-2014, 12:03 PM   #100
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Quote:
Originally Posted by Hierlevelz View Post
Is it safe to say that a progressive spring like Eibach Pk's will "sag" and be "softer" overtime beacuse of its progressive nature as opposed to a linear spring like Swift Spec R's? I am having some wheel fender clearance issues and my thought process is if I swap from Eibachs to Spec R's I can regain some additional ride height and alleveiate my rubbing issues. Swift does market their spring as having a 1.0"/0.8" lowering height front to rear on the 335i vs. Eibachs 1.4"/1.0".
what you say about progressive springs may be true, however in the case of Eibach pro kit, you may be surprised to know (as I was), that they are in fact LINEAR.

Check out this thread. Eibach reps join the thread to answer questions and I asked them about progressive or linear. Posts 11 and 12.

http://www.e90post.com/forums/showthread.php?t=959982

Before this thread, I called them on the phone, got the same answer: LINEAR. Still, for some reason I didn't believe it

D's Bimmer also confirmed this with respect to pro-kit springs used with the Bilstein B12 kit.
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      05-07-2014, 12:26 PM   #101
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Quote:
Originally Posted by Hierlevelz View Post
Is it safe to say that a progressive spring like Eibach Pk's will "sag" and be "softer" overtime beacuse of its progressive nature as opposed to a linear spring like Swift Spec R's? I am having some wheel fender clearance issues and my thought process is if I swap from Eibachs to Spec R's I can regain some additional ride height and alleveiate my rubbing issues. Swift does market their spring as having a 1.0"/0.8" lowering height front to rear on the 335i vs. Eibachs 1.4"/1.0".
is your rubbing in the rear or the front?

if it's in the rear, you could gain ride height with ride height adjusters and 60mm or 2.5 id rear springs, your choice of spring weight. I'm pursuing something similar in order to increase spring rate and maintain ZSP rear height.

for the front, some increase negative camber to work around it.

also for the front, I've looked at but haven't tried BMW performance springs. They might provide a little less drop, are linear, and you can buy them individually.
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      05-07-2014, 01:11 PM   #102
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Quote:
Originally Posted by mlifxs View Post
is your rubbing in the rear or the front?

if it's in the rear, you could gain ride height with ride height adjusters and 60mm or 2.5 id rear springs, your choice of spring weight. I'm pursuing something similar in order to increase spring rate and maintain ZSP rear height.

for the front, some increase negative camber to work around it.

also for the front, I've looked at but haven't tried BMW performance springs. They might provide a little less drop, are linear, and you can buy them individually.
Its the rears that I am having clearance issues with. So the ride height adjusters with 60mm spring in the rear doesnt affect the attitude of the vehicle given that we would still be using eibach coils at the front? I mean I suppose the car doenst know the difference between brand names right lol? Beside coilover for these cars are essentiallly the same in the rear?
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      05-07-2014, 01:29 PM   #103
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Quote:
Originally Posted by Hierlevelz View Post
Its the rears that I am having clearance issues with. So the ride height adjusters with 60mm spring in the rear doesnt affect the attitude of the vehicle given that we would still be using eibach coils at the front? I mean I suppose the car doenst know the difference between brand names right lol? Beside coilover for these cars are essentiallly the same in the rear?
I'm guessing you might look a little raked but I think it would be pretty similar if you keep the spring rate close.

The ride height adjuster I chose is also used in the same vendor's coilover kit, I just bought it separately.

I'm ZSP now on heavier duty dampers (BMW PS V1), and I want to increase my spring rate in the back, without lowering. So, I bought ride height adjusters and linear #500 lb springs. Have not installed them yet, maybe in a week or two. I did get some consultation from the vendor on what length to choose and how I might set the ride height adjusters.

I'm thinking too though, if you're happy with your springs, would it be easier to fender roll? Idk I haven't tried that but some folks seem to go after that like it's no big deal(?)
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      05-07-2014, 11:35 PM   #104
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Quote:
Originally Posted by mlifxs View Post
I'm guessing you might look a little raked but I think it would be pretty similar if you keep the spring rate close.

The ride height adjuster I chose is also used in the same vendor's coilover kit, I just bought it separately.

I'm ZSP now on heavier duty dampers (BMW PS V1), and I want to increase my spring rate in the back, without lowering. So, I bought ride height adjusters and linear #500 lb springs. Have not installed them yet, maybe in a week or two. I did get some consultation from the vendor on what length to choose and how I might set the ride height adjusters.

I'm thinking too though, if you're happy with your springs, would it be easier to fender roll? Idk I haven't tried that but some folks seem to go after that like it's no big deal(?)
I'm going with the HPA Coilover kit specd out by Harold. I had fenders rolled but I'm not 100% convinced they were rolled enough to maximize clearance.
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