[jjc034]

Hey,

I was wondering if anyone has swapped out their Bilstein B14 progressive springs with linear ones? Will that completely throw off the suspension performance due to the shocks not being tuned for those kinds of springs?

Your help would be greatly appreciated!

Best,
John

 

[UnfocusedST]

Hey,

I was wondering if anyone has swapped out their Bilstein B14 progressive springs with linear ones? Will that completely throw off the suspension performance due to the shocks not being tuned for those kinds of springs?

Your help would be greatly appreciated!

Best,
John

I don't think you could. The MFactory coilovers offer swift for front and rear.

Sent from another garage.

 

[mitch808]

The spring shape is unique to what Bilstein created, and not a standard coilover spring shape. So no.

If it were possible, you would have to machine custom spring seats, and switch to a new tophat. At that point, you would have just bought a brand new coilover system that came with or can run different spring rates. Since the machining alone would set you back over $1000 in labor.

 

[freakin_elrod]

Depending on the diameter of the spring perch, you may be able to, at least for the front. The rear you would have to get a spring perch similar to what ground control offers. The b14 dampers would essetially be like a koni/gc setup without the rebound adjustment. Not sure it would be worth the hassle though.

 

[jjc034]

Wah wah lol. Looks like fortune may get my business later on

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[freakin_elrod]

I would much rather be on the b14 spring rates than the fortune autos if you do any kind of track/auto- x, (ask UnfocusedST as he made the switch from fortune auto). Nothing wrong with them except you cant do jack for the rear rates unless you do custom rear perches, which in turn you'd be better off going with the MFactory's if you are adamant about making the switch.

 

[UnfocusedST]

I would much rather be on the b14 spring rates than the fortune autos if you do any kind of track/auto- x, (ask UnfocusedST as he made the switch from fortune auto). Nothing wrong with them except you cant do jack for the rear rates unless you do custom rear perches, which in turn you'd be better off going with the MFactory's if you are adamant about making the switch.

I've been enjoying the MFactory coilovers. You can pretty much do any rate you want front and rear. They use a standard 2.5" coil.

Sent from another garage.

 

[jjc034]

I would much rather be on the b14 spring rates than the fortune autos if you do any kind of track/auto- x, (ask UnfocusedST as he made the switch from fortune auto). Nothing wrong with them except you cant do jack for the rear rates unless you do custom rear perches, which in turn you'd be better off going with the MFactory's if you are adamant about making the switch.

Hmm...interesting. thanks for the insight! I thought progressive springs aren't good for track though

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[freakin_elrod]

While they are progressive springs bilstein does rate them at 340f/370r according to info obtained from bilstein by a forum user on here (post #33 i believe) http://www.focusst.org/forum/focus-st-suspension/42308-please-help-me-decide-4.html

 

[jjc034]

Yeah i know, just didn't know if i could swap easily

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[lijbu8]

I just installed my b14s and I can't find anything about preload on these springs. My height adjuster for the front is set halfway and I barely have any preload. If I go any lower the spring would be loose. Does anyone else have this problem?