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  • 1996 - 2004 SN95 Mustang -General/Talk-

so i cut my springs today!!

  • Thread starter Thread starter jlds91389
  • Start date Start date Apr 20, 2009
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Twista

Active Member
May 7, 2004
510
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@ the z00 in chicago
Apr 28, 2009
#41
  • Apr 28, 2009
  • #41
still looks 4x4
 
J

jlds91389

New Member
Feb 1, 2009
241
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Orange Tx
Apr 28, 2009
#42
  • Apr 28, 2009
  • #42
^^
 

32ValveRom

Member
Feb 15, 2009
328
0
17
Fl
Apr 29, 2009
#43
  • Apr 29, 2009
  • #43
bonestock87 said:
I actually did quite a bit of reading on the pro's and con's of cutting my stock springs. I ended up deciding it was going to be just fine for me. I cut 3/4 of a coil in the back and 1 full coil in the front. I added MM caster/camber plates and headed straight for the alignment shop. That was 2 years ago and I've experienced zero negative effects. Ride height is spot on and ride quality was not affected enough for me to notice whatsoever.
Click to expand...

What are the CC plate for?
 

bonestock87

Founding Member
Dec 19, 2001
732
12
38
Cape Coral, FL
Apr 29, 2009
#44
  • Apr 29, 2009
  • #44
What are the CC plate for?
Click to expand...

To get a proper front end alignment. Any lowered car, whether with aftermarket springs or cut stock ones must be aligned after install.
 
J

jlds91389

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Feb 1, 2009
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#45
  • Apr 29, 2009
  • #45
^^ CORRECT lol
 
N

ninjastang125

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Nov 1, 2008
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maryland
Apr 29, 2009
#46
  • Apr 29, 2009
  • #46
i like my 4x4 stance and ride.i had the eibach pro kit and had it aligned and liked the stance but the ride was bouncy as hell so i went right home and put the stockers back on. is there any lowering kit that will not be bounce me like im driving a jeep through the woods.
 
J

jlds91389

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Feb 1, 2009
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#47
  • Apr 30, 2009
  • #47
^^ my cut rear springs dont bounce at all fells just like stock havent dont the fronts yet so i dont know what thats going to be like
 

four six

Member
Jan 19, 2006
506
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Hobart, IN
Apr 30, 2009
#48
  • Apr 30, 2009
  • #48
Spring delete!
 

Stan Weiss

Member
Dec 8, 2006
347
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Philadelphia, PA
Apr 30, 2009
#49
  • Apr 30, 2009
  • #49
crazystang25 said:
Spring rates are off. Therefore causing suspension to wear faster and bottom out. So who's is worthless.

Posted via Mobile Device
Click to expand...

Cutting a spring does change its rate. The rate will increase. How much depends on how much is removed, how many coils the spring had to start with, and many other factors. How does this cause faster suspension wear?
 

stangalator

New Member
Mar 3, 2009
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NY
Apr 30, 2009
#50
  • Apr 30, 2009
  • #50
ninjastang125 said:
i like my 4x4 stance and ride.i had the eibach pro kit and had it aligned and liked the stance but the ride was bouncy as hell so i went right home and put the stockers back on. is there any lowering kit that will not be bounce me like im driving a jeep through the woods.
Click to expand...

they wont bounce if you update your struts, when ford designed the mustangs suspension they generally shot for a hair under critically damped systems.
Long story short this is c^2=4km (critically damped) c being your damping coefficient, k being the spring rate and m being the mass of the vehicle (well ~1/4 of the vehicle for each wheel, but anyways...)

Anyways, when adding lowering springs the k value has to go up becuase if left stock it would bottom out like nobodies business. So, if the c is left as it is the system goes to c^2<4km and it will become bouncy. SO if you don't want to replace your struts shoot for a spring with similar spring rates as your stock springs.

Hope this helps
 

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  • common springs and their rates1.doc
    common springs and their rates1.doc
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J

jlds91389

New Member
Feb 1, 2009
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Orange Tx
Apr 30, 2009
#51
  • Apr 30, 2009
  • #51
spring delete lol
 

Stan Weiss

Member
Dec 8, 2006
347
2
16
Philadelphia, PA
Apr 30, 2009
#52
  • Apr 30, 2009
  • #52
stangalator said:
they wont bounce if you update your struts, when ford designed the mustangs suspension they generally shot for a hair under critically damped systems.
Long story short this is c^2=4km (critically damped) c being your damping coefficient, k being the spring rate and m being the mass of the vehicle (well ~1/4 of the vehicle for each wheel, but anyways...)

Anyways, when adding lowering springs the k value has to go up becuase if left stock it would bottom out like nobodies business. So, if the c is left as it is the system goes to c^2<4km and it will become bouncy. SO if you don't want to replace your struts shoot for a spring with similar spring rates as your stock springs.

Hope this helps
Click to expand...

But remember that a shorter spring of the same rate will bottom out from less load than the long stock spring.
 
N

ninjastang125

New Member
Nov 1, 2008
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maryland
Apr 30, 2009
#53
  • Apr 30, 2009
  • #53
oo gotcha
 
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