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Quick Coilover Preload Question

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Old Aug 22, 2011 | 02:21 PM
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EJ1_CRIS_909's Avatar
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Default Quick Coilover Preload Question

Ok i searched and had no luck. Just wondering, if i were to increase the preload on my coilovers (meaning i raised the spring perches up a couple mm), would the car lower from incresed preload, or raise up? All help is appreciated, Thank you

Last edited by EJ1_CRIS_909; Aug 22, 2011 at 08:52 PM.
Old Aug 22, 2011 | 04:48 PM
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Default Re: Quick Coilover Preload Question

49 views, no answer?
Old Aug 22, 2011 | 05:36 PM
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Default Re: Quick Coilover Preload Question

Originally Posted by EJ1_CRIS_909
49 views, no answer?
Because, honestly, it's a rather retarded question.

The preload itself doesn't affect the ride height, unless it is taken to extreme amounts (which is rather hard to do), but since you're moving a spring perch you will change the ride height.

Just do it "correctly", set a slight preload to keep the spring seated (preload has no effect on handling), set the ride height where you want it, then get the car aligned.
Old Aug 22, 2011 | 05:51 PM
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Default Re: Quick Coilover Preload Question

Yeah if I saw this earlier I would have said the same. The preload doesn't affect the height just the third, or bottom screw, given you have screwed the bottom of the coilover up to meet that third plate.. or till it stops then bring the screw down.
Old Aug 22, 2011 | 05:54 PM
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Default Re: Quick Coilover Preload Question

If you tighten the preload even more, you can lower the car more giving more threads to move the lower perch up even more but at the same time, you run a risk of voiding warranty and blowing the dampeners out even faster because your decreasing the stroke of the dampener and it has less travel i think
Old Aug 22, 2011 | 06:17 PM
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Default Re: Quick Coilover Preload Question

Originally Posted by TunerN00b
Because, honestly, it's a rather retarded question.

The preload itself doesn't affect the ride height, unless it is taken to extreme amounts (which is rather hard to do), but since you're moving a spring perch you will change the ride height.

Just do it "correctly", set a slight preload to keep the spring seated (preload has no effect on handling), set the ride height where you want it, then get the car aligned.
Hey theres no need for negativity, is this not what this website is for? Tech questions?
I was simply asking a question in which i could not find an answer to and did not know. Sorry I wasnt "Born" with knowledge of coilovers.
Old Aug 22, 2011 | 06:20 PM
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Default Re: Quick Coilover Preload Question

Originally Posted by 99civ
Yeah if I saw this earlier I would have said the same. The preload doesn't affect the height just the third, or bottom screw, given you have screwed the bottom of the coilover up to meet that third plate.. or till it stops then bring the screw down.
Ok thank you for the answer, Im not trying to go lower or higher, just simply trying to tighten up the suspension in the front a little bit. I know it voids warranty, but at the moment i have shitty suspension (function and form) and im not worried about their crappy warranty.
Old Aug 22, 2011 | 08:32 PM
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Default Re: Quick Coilover Preload Question

Yea you can try tightening up the pre load more but if that bottom part only tightens to "so far" then the pre load really doesn't matter. The pre load is obviously there to reduce spring sag unless you really are 'racing' which most aren't. Mine has hit the track once all summer and she is not my daily. fail. I blame work though.
Old Aug 22, 2011 | 08:33 PM
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Default Re: Quick Coilover Preload Question

Originally Posted by EJ1_CRIS_909
Ok thank you for the answer, Im not trying to go lower or higher, just simply trying to tighten up the suspension in the front a little bit. I know it voids warranty, but at the moment i have shitty suspension (function and form) and im not worried about their crappy warranty.
And yea fuuck their warranties.. i work retail sales for tv's and trust me.. fucuk manufacture's warranties.
Old Aug 22, 2011 | 08:52 PM
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Default Re: Quick Coilover Preload Question

It will raise the corner.

You are raising the point that the car rests on. It will reduce the "sag", which is how much the car drops from the point the tire touches the ground, and the position it rests at static height.

Its probably not the point you were looking for.
Old Aug 22, 2011 | 09:10 PM
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Default Re: Quick Coilover Preload Question

Originally Posted by Tyson
It will raise the corner.

You are raising the point that the car rests on. It will reduce the "sag", which is how much the car drops from the point the tire touches the ground, and the position it rests at static height.

Its probably not the point you were looking for.
So basically, increasing preload= raising the whole car?
Im just trying to stiffen it up a little without raising height/lowering ride height.
The lower perches are raised all the way, so its at its lowest, but its still not considered TOO low because its not even tucking tires or anything.
Its at the perfect "Functioning" height (its not too low)
Old Aug 23, 2011 | 09:51 AM
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Default Re: Quick Coilover Preload Question

Originally Posted by EJ1_CRIS_909
Im just trying to stiffen it up a little without raising height/lowering ride height.
You need to change springs then.

No reasonable amount of preload will change the spring rate. And an "unreasonable" amount in this case is so much preload that the car doesn't compress the springs at all when set down on its suspension...

Which is why I was being "negative", as you put it. There are plenty of threads discussing why and how preload is essentially meaningless, which can be found with some quick searching.

Use spring rubbers. They won't change the rate radically, but they do allow a little bit of adjustment in spring rate.
Old Aug 23, 2011 | 10:09 AM
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Default Re: Quick Coilover Preload Question

Ok basically, i need new suspension. Got it. Cuz im not putting any money into shitty coilover thatll just blow after a year. Ok well thanks for the info, and sorry about above, its just I get tired of people flaming posts when its not a common subject. Flame the people that post things like high idle or something lol...
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