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Originally posted by glnr13 View Poste30 rears don't have preload, just ride height adjustable. Unless you've switched to a rear coil that is on the shock.
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Originally posted by E30_Narek View PostThey most certainly do have preload. I adjusted the shock height which completely messed up the ride quality. The preload's on the spring.
is your spring on the shock body or wedged between the frame and trailing arm?
if it's on the shock body than just crank the spring perch upwards.
if it's on the trailing arm you can't adjust preload, that's just ride height adjust.Last edited by glnr13; 11-20-2017, 02:22 PM.sigpic
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Originally posted by glnr13 View PostI'm not following what you're saying. From my use of coilovers e30's aren't set up for spring preload in the rear unless there are 2 sleeves.
is your spring on the shock body or wedged between the frame and trailing arm?
if it's on the shock body than just crank the spring perch upwards.
if it's on the trailing arm you can't adjust preload, that's just ride height adjust.@IRON-E30 aka Edwin:D
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Originally posted by glnr13 View PostI'm not following what you're saying. From my use of coilovers e30's aren't set up for spring preload in the rear unless there are 2 sleeves.
is your spring on the shock body or wedged between the frame and trailing arm?
if it's on the shock body than just crank the spring perch upwards.
if it's on the trailing arm you can't adjust preload, that's just ride height adjust.
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Originally posted by E30_Narek View PostThen what's the difference between the adjuster on the shock and the adjusters on the spring? And why did my ride quality go completely to shit when I shortened the shock a little?
this is an example of preload adjustment on a bc front coil:
the rear does not have a second sleeve to control the compression of the rear so there is no preload on our oprhaned spring set up.
what coilovers are you running?
when you shorten the shock length you are losing shock travel. less travel means less comfort in it's simplest form.sigpic
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Thanks for the detailed post! I'm running BC's on mine. I searched around google a bit and found a video BC made on preload adjustment for cars that have independent rear suspension. The video said to unbolt the shock at the bottom, lower the spring as much as possible, then jack up the control arm to a desired height and adjust the spring to that height and finally lower or raise the shock to that chosen height. Apparently that's how you set the preload. But now I'm confused since 2 people are saying these cars don't have preload in the rear.
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my opinion tells me that the technique described by BC doesn't apply to oprhaned spring/shock combos but a shorter shock does in theory affect ride height so there may be some truth to that. try their suggestion, worst case you go back. I definitely would not call this preload on our setup though.
by the way, how do you feel about those BC's? how long you been on them? when you're going down the 2 southbound and you hit those 2 bump/dips by glendale high and eagle rock plaza how's the car feel? does it float at any point or does it feel like it's crashing down? or just smooth all the way through?sigpic
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Originally posted by glnr13 View Postmy opinion tells me that the technique described by BC doesn't apply to oprhaned spring/shock combos but a shorter shock does in theory affect ride height so there may be some truth to that. try their suggestion, worst case you go back. I definitely would not call this preload on our setup though.
by the way, how do you feel about those BC's? how long you been on them? when you're going down the 2 southbound and you hit those 2 bump/dips by glendale high and eagle rock plaza how's the car feel? does it float at any point or does it feel like it's crashing down? or just smooth all the way through?
Yeah I'll try it out tonight, hopefully it works. Getting tired of every small bump causing the car to bounce or harshly shake. One more thing, what do you mean when you say "orphaned spring/shock combo?" Never heard that term before.
The BCs have been great so far. I've had them for about 2 and a half years. They are a bit on the stiffer side and I do have poly urethane bushings all around so I guess that adds to the stiffness. I haven't driven around eagle rock with this thing in a while so I don't really remember how it feels around there but recently, the car felt like it's been "crashing down" whenever I hit any dip on the freeway though that's because I messed up something when I was lowering the rear.
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Originally posted by E30_Narek View PostYeah I'll try it out tonight, hopefully it works. Getting tired of every small bump causing the car to bounce or harshly shake. One more thing, what do you mean when you say "orphaned spring/shock combo?" Never heard that term before.
orphaned = spring one place, shock in another
e30, lots of volkswagens, some older mercedes have orphaned set ups.sigpic
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