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Pre-Load

 
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  #1 (permalink)  
Old 09-22-2008, 12:36 PM
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Pre-Load

I have a set of Teins and I have no idea what pre-load is and what to set it to. I'm going for as comfortable a ride as I can get on these.
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Old 09-24-2008, 04:28 PM
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Re: Pre-Load

Really? No one knows what pre-load is?
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Old 09-24-2008, 04:45 PM
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Re: Pre-Load

I take it you are talking about shocks and struts? what kind did you get?
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Old 09-24-2008, 06:33 PM
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Re: Pre-Load

pre load the car at rest. its the compression of the suspension with no weight transfer. meaning no acceleration, no turning, no breaking on a flat surface. when you adjust it you probably want someone in the driver seat.
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Old 09-25-2008, 09:18 AM
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Re: Pre-Load

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Originally Posted by 99PreludeSh View Post
I take it you are talking about shocks and struts? what kind did you get?
Tein Flex Master.
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Old 10-01-2008, 10:15 AM
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Re: Pre-Load

Nada? I really have no idea what pre-load is.
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Old 10-02-2008, 04:41 AM
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Re: Pre-Load

All I know about it is that it needs to be adjusted with the front wheels OFF the ground (both of them). Not sure but just thinking logically about it, I would assume the more preload you have, the stiffer the ride. Just an assumption though.
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Old 10-03-2008, 06:43 AM
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Re: Pre-Load

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Originally Posted by dbd6604 View Post
All I know about it is that it needs to be adjusted with the front wheels OFF the ground (both of them). Not sure but just thinking logically about it, I would assume the more preload you have, the stiffer the ride. Just an assumption though.
not true. pre-load, if you read what i wrote before, is the compression of the suspension with the car AT REST. meaning no accel, no decel, and no turning. the car sitting still. key word here is the "COMPRESSION" if you break the word apart, PRE- meaning before something or prior to. and load is a load applied to something. so the whole word is prior to applying a load. meaning the car at rest with no weight transfer. you would want someone in the driver seat when you adjust.
yes, true the more pre-load, the stiffer the ride. but you don't always want a stiff ride. sometimes to stiff of a ride can worsen handling.
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Old 10-03-2008, 06:46 AM
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Re: Pre-Load

I feel like i just learned something but i'm not really sure....i guess i am asking how does one pre-load? or what exactly is being adjusted here?
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Old 10-03-2008, 06:50 AM
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Re: Pre-Load

heighth and damping no?
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Old 10-03-2008, 06:55 AM
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Re: Pre-Load

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Originally Posted by ogsmakdade View Post
heighth and damping no?
ok, dampening for example (height is the easy part); how do you know when it is adjusted properly? adjust it, take it for a test drive, and repeat?
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Old 10-03-2008, 08:57 AM
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Re: Pre-Load

To lessen the preload, should you adjust clockwise or counter clockwise? I'm also not sure if there is enough room in the wheel well to get in there when the car is on the ground.
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Old 10-04-2008, 12:59 AM
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Re: Pre-Load

I'm sorry. The way I was taught was that pre-load should be adjusted with the wheels off the ground. And obviously, I wasn't saying that you want the stiffest ride possible. I just thought that more pre-load meant stiffer ride. My bad.
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Old 10-04-2008, 06:56 AM
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Re: Pre-Load

pre-load is one of those things i'm not to sure about. i know what it means. but i couldn't tell you how to adjust it. honestly, i didn't think it could be adjusted. you'd have to look at your instruction manual for your setup. i'm not even sure pre-load has anything to do with comfort..... it shouldn't. all it is is the force the suspension applies to the car at rest. once the car isn't at rest it no longer applies. then it becomes another force like rebound.

i've been trying to educate my self on this but its hard to find good info on it. i can only seem to find stuff about motorcycles.

if you can't get in there to adjust it you would have to simulate on the ground. meaning, jack up the car, removed the wheels, lower the suspension on some jack stands. its not exact but thats as close as you're gonna get.
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Old 10-04-2008, 10:41 AM
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Re: Pre-Load

yea when i adjusted my old D2s (which i miss SO MUCH) i just had the car rest on flat ground and I adjusted all of them to the same measure. I dont remember exactly since they were 36-way adjustable but it was something along the lines of tighten all the way and fall back 3/4 of a turn to a specific "tick" mark. I dont know if it was the correct way to do it but i could always tell a difference after adjusting. I figured if they were all the same I would have less to troubleshoot.
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Old 10-08-2008, 09:09 AM
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Re: Pre-Load

So to lessen the preload, which way do I turn it?
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Old 10-08-2008, 09:57 AM
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Re: Pre-Load

thats not a question easily answered with out looking at some sort of instruction manual or having the suspension right in front of me.... but i think i figured it out. pre-load is the spring compression prior to shock compression. because shocks provide the opposite reaction. and pre load is prior to that. so you would adjust it while the suspension is fully extended. not compressed like i said before. so pre-load is only related to how compressed the springs are. so the more compressed the spring is the higher the preload. the more decompressed the spring is the less preload.

it seems like every time i find something new about pre-load it contradicts what i just finished reading. some say preload doesn't effect comfort. but some sites say it does. and logic tells me it does since you are compressing and decompressing the spring. some sites also say it doesn't effect ride height. but logic says, it does... again, cuz you are compressing and decompressing the spring. that whole first paragraph is all compiled information that logically makes sense from several of the sites i've researched. so it could be wrong. now the struts you have might have some design i'm not to familiar with, which could totally blow my logic out of the water. so in order to cover my logic possibly being wrong................... like i said before. read the manual that came with the suspension.... if you didn't get one call tein and have them mail you one. or something i don't know. honestly your best bet would be to just call tein and ask. you're only gonna find missinformation on the net..... as evident right here in this entire thread.
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Old 10-08-2008, 11:05 AM
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Re: Pre-Load

Of course the manual doesn't say anything about the preload adjustment, just ride height and dampening adjustment. I talked to a guy at a local tuner shop and he said that the preload affects how quickly, or slowly the suspension returns to it neutral position. So it should affect ride comfort and handling. He said to turn it clockwise to lessen it, but that doesn't make sense.
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Old 10-08-2008, 12:20 PM
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Re: Pre-Load

if the manual doesn't say anything..... are you sure the preload is adjustable. the way these websites are describing how its adjustable.... its different then ride height adjustments. but like i said before. compress the spring more to increase. decompress the spring to decrease.
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Old 10-08-2008, 12:26 PM
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Re: Pre-Load

There are two different adjustment points. One at the bottom of the strut/shock, for height. And one at the top for preload. I can't imagine they would both be for height, plus it doesn't seem like it changes the height when I adjust the top one. So to decompress it, it only makes sense that adjusting it counter clock-wise would do that, i.e. lefty loosey.

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Old 10-08-2008, 01:05 PM
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Re: Pre-Load

ooooooooook, now we're getting somewhere. thats what i was trying to figure out how you adjust it in the first place. i see, so we got a top nut for preload. theoretically, lefty is loosy. but not on everything. spin the nut and see which way it goes. down would compress the spring. up would decompress the spring. so make it go up.

let us know what comes out of this. you should try different adjustments and take it for a ride just to see what each does. and report back to us. i wanna know once and for all what preload actually does.
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Old 10-08-2008, 03:39 PM
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Re: Pre-Load

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Originally Posted by Drew View Post
thats not a question easily answered with out looking at some sort of instruction manual or having the suspension right in front of me.... but i think i figured it out. pre-load is the spring compression prior to shock compression. because shocks provide the opposite reaction. and pre load is prior to that. so you would adjust it while the suspension is fully extended. not compressed like i said before. so pre-load is only related to how compressed the springs are. so the more compressed the spring is the higher the preload. the more decompressed the spring is the less preload.

it seems like every time i find something new about pre-load it contradicts what i just finished reading. some say preload doesn't effect comfort. but some sites say it does. and logic tells me it does since you are compressing and decompressing the spring. some sites also say it doesn't effect ride height. but logic says, it does... again, cuz you are compressing and decompressing the spring. that whole first paragraph is all compiled information that logically makes sense from several of the sites i've researched. so it could be wrong. now the struts you have might have some design i'm not to familiar with, which could totally blow my logic out of the water. so in order to cover my logic possibly being wrong................... like i said before. read the manual that came with the suspension.... if you didn't get one call tein and have them mail you one. or something i don't know. honestly your best bet would be to just call tein and ask. you're only gonna find missinformation on the net..... as evident right here in this entire thread.
Awesome post Drew! that is pretty much how I see it too. I don't know if it what you said is "correct" but logically, i see it the same way in my head I think the pre-load adjustment is all relative to how much the springs are allowed to compress, based on the pre-load adjustment.

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Originally Posted by mckillio View Post
There are two different adjustment points. One at the bottom of the strut/shock, for height. And one at the top for preload. I can't imagine they would both be for height, plus it doesn't seem like it changes the height when I adjust the top one. So to decompress it, it only makes sense that adjusting it counter clock-wise would do that, i.e. lefty loosey.
It should be lefty loosey righty tighty. On my previoius setup, if I loosened them all the way to the last setting, I felt like I was driving a floater, you know like a cutlass or an impala. When it was tightened all the way, felt more like a go cart. So I just found a happy medium in between. For me, I kept it a little tighter. I always did my adjustments with the car ON the ground though so I don't even know how relevant this is lol.
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Old 10-13-2008, 09:12 AM
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Re: Pre-Load

So I adjusted it over the weekend. I turned them counter-clockwise, which actually compressed the spring upwards. This made the ride more comfortable and raised it as well, so now I think I'm even more confused. Was I adjusting the height or the preload?
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Old 10-14-2008, 02:03 AM
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Re: Pre-Load

Both? And I was reading an article somewhere on the internet, can't remember where, about installing/adjusting a front strut tower bar. This article states that pre-load needs to be adjusted with the wheels off the ground like I thought. It's the internet, so I can't guarantee that this is 100% correct, but it seemed to be a pretty credible website.

Quote:
which actually compressed the spring upwards
Do you mean the spring actually extended and got longer, or it just shifted upwards on the shock body?
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Old 10-14-2008, 09:11 AM
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Re: Pre-Load

I can't say for sure whether or not the spring was moving upwards or compressing upwards, I hope that makes sense. I would assume it was compressing upwards though.
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Old 10-14-2008, 06:06 PM
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Re: Pre-Load

Quote:
I would assume it was compressing upwards though.
As in just stretching?
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Old 10-15-2008, 07:18 AM
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Re: Pre-Load

i think he means the bottom of the spring was moving up, hence the upward part, while the top of the spring stayed stationary, hence the compressing part.
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Old 10-15-2008, 12:50 PM
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Re: Pre-Load

I can't confirm whether or not the top of the spring was moving though. I assume it was since the ride is more comfortable now though.
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