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Old 09-19-2004, 07:15 PM   #1
deviseltd
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Default cutting pinks yay or nay?

O.k. all you PINK lovers and promoters you now who you are.......im going to get then for my sti..i only wish they were a tad lower but everything ive read says they handle greatand are a great suspension upgrade. What if one was to cut, let's say a half of inch to 3/4 of inch off, what do you think would be the outcome.would they handle the same, the spring rate would remain the same??? or would it make them pointless and basically tein s techs at that point.........has anyone ever done this???
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Old 09-19-2004, 07:27 PM   #2
DILLIGAF Racing
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you do not want to cut your springs, period
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Old 09-19-2004, 07:36 PM   #3
Arnie
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Not a good idea to do. If you want lower, definitely buy something already made lower.
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Old 09-19-2004, 07:39 PM   #4
DILLIGAF Racing
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better than cutting. Get a blow Torch out, heat the springs up REAL hot, and push down on that corner, then throw water at them. Instantly lowered.
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Old 09-19-2004, 07:44 PM   #5
hyp36rmax
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hmmm just buy lower springs, if you cut the springs then the integrity of the springs as well as the perrformance will degrade to the point where its not even worth it anymore, why dont you just get some coilovers to get the handling and look, otherwise there are some others such as the prodrives, eibach, tein, and others you can def go for....
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Old 09-19-2004, 07:47 PM   #6
DILLIGAF Racing
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oh yeah, if you couldn't tell, I was being sarcastic. NEVER heat springs. Just buy lower springs if you want a lower stance.
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Old 09-19-2004, 08:19 PM   #7
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Quote:
Originally Posted by DILLIGAF Racing
better than cutting. Get a blow Torch out, heat the springs up REAL hot, and push down on that corner, then throw water at them. Instantly lowered.
and cracked
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Old 09-20-2004, 02:38 AM   #8
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Quote:
Originally Posted by deviseltd
O.k. all you PINK lovers and promoters you now who you are.......im going to get then for my sti..i only wish they were a tad lower but everything ive read says they handle greatand are a great suspension upgrade. What if one was to cut, let's say a half of inch to 3/4 of inch off, what do you think would be the outcome.would they handle the same, the spring rate would remain the same??? or would it make them pointless and basically tein s techs at that point.........has anyone ever done this???
Where did you come from? I've been told since day one, NEVER CUT SPRINGS. you cut them, you destroy its integrity...

only people i've seen cut springs are ricey honda owners... you're not one of them now are you?
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Old 09-20-2004, 03:17 AM   #9
RS_to_WRX_swap
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I make fun of my friend daily who has cut spirngs on his integra. dont join him.
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Old 09-20-2004, 08:49 AM   #10
wrxman02
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no way. they look great the way they are.
later
andy
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Old 09-20-2004, 11:07 AM   #11
Siper2
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I'm fairly certain there's some "lowering springs" in the STi pink lineup. They are lower than the standard ones, perhaps??
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Old 09-20-2004, 05:26 PM   #12
NWWagon
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Cut springs = Rice
No springs = Fried Rice... mmm... fried rice (drools)
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Old 09-20-2004, 11:41 PM   #13
AaronWRX
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contact progress group. http://www.progressauto.com/ give them a call and find out what they have in the works. they make springs with a so-cal style drop. you may need camber bolts to correct your alignment
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Old 05-11-2005, 12:35 PM   #14
Pipercub
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I agree that 99% of the time cutting springs is just not the way to go, typicaly a honda with stock struts, springs cut in half so you are either bouncing off the bump stops or the struts are totally usless at that spring rate. However, in this case, the STI spring with a mild cut made it exactly what I was looking for. I ran STI V5 struts with P1 springs on my RS-T for about 4 years and was reasonable satasfied. When I got the STI last year the ride height (no I don't want slammed, just an inch and some change lower) and spring rate were a little too soft for me. I bought a set of STI pinks and was really dissapointed, it seemed to have even more front end dive and the ride height didn't drop by much at all. I knew I would not keep these on the car so I figured why not experement with them. I cut off one coil from the bottom, exacty even with the end of the coil using a liquid cooled cutter. On the rear I cut 2/3 of the bottom coil. I re-installed them on the car and after letting them settle and a few hundred miles I am very please to report that the result is ideal. The ride height is just right, about an inch of fender gap is maintained for reference, the car is not slammed and has pleanty of travel left. The spring rate is still well within what the struts can damp yet the front end dive is completely gone, body roll is much less than stock, and the ride quality while firm is not abusive. These springs are now exactly what I was looking for.
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Old 05-11-2005, 12:38 PM   #15
EntrustXXX
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you can cut dead coils and not have any problems but from what i remember the front springs don't have dead coils, everyone like to talk **** about cut springs but in all honesty you could cut a half a coil or a coil and you nor anyone would know the difference
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Old 05-11-2005, 12:40 PM   #16
eltrouble
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my answer: nay nay nay nay nay.
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Old 05-11-2005, 12:52 PM   #17
narenji
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god, rice is invading the subaru community... just get some tein s-techs... why waste a perfectly good set of sti pinks?
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Old 05-11-2005, 01:11 PM   #18
Pipercub
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Amazing, results are somehow less valuable than conjecture....... The STI pinks were far from perfectly good, now they are.
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Old 05-11-2005, 01:15 PM   #19
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only people how have actually cut springs should be allowed to post about this. i cut a half coil from the front of my scion springs and it's been fine
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Old 05-11-2005, 04:29 PM   #20
Vikingmoose
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Quote:
Originally Posted by EntrustXXX
only people how have actually cut springs should be allowed to post about this. i cut a half coil from the front of my scion springs and it's been fine
Why is that? I've never cut springs on any car, but that is because I know better. I have a BS in Mechanical Engineering and had to take a course on vibrations, which covered a lot about springs. Any mechanical engineer out there will tell you that cutting springs arbitrarily will seriously compromise the springs properties, or as others have said "integrity". Just because you think everything is ok, doesn't mean it is. ALL springs have characteristics and properties based on several things, and by cutting springs you are changing those characteristics and properties. Have you done any calculations before cutting your springs? If I put some basic equations for springs in front of you, I think you'd be surprised how complicated this is.

I don't mean to single you out, this is more of a general comment. But please trust me when I say, "DO NOT CUT YOUR SPRINGS!" Any mechanical or vibration engineer will back me up.
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Old 05-11-2005, 04:36 PM   #21
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I'm on coilovers so this doesn't apply to me. And I think that I would sell the pinks and buy some shorter springs if I were you...however my question is:

If the spring is linear, not progressive, the spring rate would not change if you cut them, would it?
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Old 05-11-2005, 06:04 PM   #22
Pipercub
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"I don't mean to single you out, this is more of a general comment. But please trust me when I say, "DO NOT CUT YOUR SPRINGS!" Any mechanical or vibration engineer will back me up."

"Any mechanical engineer out there will tell you that cutting springs arbitrarily will seriously compromise the springs properties, "


Very sorry to dissapoint you exactly as you challenged. As a Scientist II for Boeing in the space program I can assure you I have sufficient engineering and scientific credentials and I do not back you up. Of course other than to agree that modifying the springs does comprimise/alter the properties. In this case the end result was desireable with reasonable spring rate and ride height. I understand your doubt as the average spring cutting job is a height based choice and usually the results are as flawed as the planning. But I will not agree that the results I got are somehow invalid because the majority of other results are negative.
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Old 05-11-2005, 07:04 PM   #23
Vikingmoose
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Pipercub-

I don't disagree that good results can be had. But the truth of the matter is most people just cut without thinking about what the results will be, other than their car is now lower. We both agree that modifying the springs does comprimise/alter the properties, but my main point was the fact that if you don't know what you're doing then things may/will not turn out how you wanted.

Did I make myself clearer?
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Old 06-06-2005, 10:41 PM   #24
Call_me_Tom
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Quote:
Originally Posted by Pipercub
I agree that 99% of the time cutting springs is just not the way to go, typicaly a honda with stock struts, springs cut in half so you are either bouncing off the bump stops or the struts are totally usless at that spring rate. However, in this case, the STI spring with a mild cut made it exactly what I was looking for. I ran STI V5 struts with P1 springs on my RS-T for about 4 years and was reasonable satasfied. When I got the STI last year the ride height (no I don't want slammed, just an inch and some change lower) and spring rate were a little too soft for me. I bought a set of STI pinks and was really dissapointed, it seemed to have even more front end dive and the ride height didn't drop by much at all. I knew I would not keep these on the car so I figured why not experement with them. I cut off one coil from the bottom, exacty even with the end of the coil using a liquid cooled cutter. On the rear I cut 2/3 of the bottom coil. I re-installed them on the car and after letting them settle and a few hundred miles I am very please to report that the result is ideal. The ride height is just right, about an inch of fender gap is maintained for reference, the car is not slammed and has pleanty of travel left. The spring rate is still well within what the struts can damp yet the front end dive is completely gone, body roll is much less than stock, and the ride quality while firm is not abusive. These springs are now exactly what I was looking for.
^^^Thanks for all of the help. Here are before and after pictures.
Stock Set Up

STI Springs & WRX Struts (Sorry for the bad pic I used a cheap cam that day)


STI Springs & STI Struts (Note Front springs bottom coil cut, Rear untouched)
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Old 06-06-2005, 10:47 PM   #25
Call_me_Tom
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Stock Set Up Front

STI Springs Front

STI Spings (cut) STI Struts Front
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