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Front roll centre correction when lowering... options?

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Old Aug 14, 2017 | 12:56 AM
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Default Front roll centre correction when lowering... options?

Right folks, I'm in the process of doing my suspension refresh and coilover fit. So far I've completely stripped down the RH front corner and I'm trying to figure out what other parts I should fit at the same time while it's stripped, or would give me a benefit. Bushes all look in good condition (other than the caster bush, I knew this was seized but what a bastard to remove it was) so I'm sticking with them for ease/cost/refinement. Since I'll be lowering a bit when refitting everything, I figure I should maybe do something about the roll centre. I'm confused though.

So I'll use a random picture here to illustrate:



So imagining the blue J's balljoint/RCA is actually the stock part, is there such a mod for just the gold part pictured? Ie, just a spacer that moves the hub upwards from the lower arm, while still retaining the stock balljoint?

I might just be being thick, but I can't seem to find a product which does this. Seems everything includes new balljoints, and costs loads. There's nothing wrong with my stock balljoints, so why would I want to replace them? I think for best cost/reward I was hoping for a roll centre spacer and retain stock balljoints along with a anti-bump steer spacer set to correct the rack height.

Anyone who's done this able to shed a bit of light for me?
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Old Aug 14, 2017 | 01:18 AM
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I looked for exactly what you explained but found the same as you but to be honest most people on here don't lower the car enough to warrant these.
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Old Aug 14, 2017 | 03:55 AM
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I use them front and rear as my car is very low, and ran out of alignment room. I use Hardrace ones.

I don't think you can just shim them though?
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Old Aug 14, 2017 | 04:13 AM
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​​​​​So, I've found this:

J'S RACING S2000 Roll Center Adjuster Plate L2 | 6TWO1 HONDA TUNING

Which is exactly for a set of the gold plates I pictured earlier - but it states "It cannot be used with other camber joints or with the stock parts." Doesn't really make sense to me as the hole centres must be spaced the same as stock, I'll take another look at my stock balljoints this eve.

Originally Posted by MB
I use them front and rear as my car is very low, and ran out of alignment room. I use Hardrace ones.

I don't think you can just shim them though?
Thanks Mark, had already looked at the Hard Race ones but I'm loathed to pay £200 quid for a balljoint, especially when there isn't really any need. Just trying to understand why you can't shim/space up from the stock ones.
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Old Aug 14, 2017 | 04:16 AM
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They will work fine, good find. A lot of money for two pieces of aluminium and some bolts though
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Old Aug 14, 2017 | 04:35 AM
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Originally Posted by har-vey
They will work fine, good find. A lot of money for two pieces of aluminium and some bolts though
Indeed - but cheaper than balljoints at least. I just want to check that the stock balljoint has both mounting holes flush to the mounting plane - ie, if one is raised higher than the other then that's the only reason I can think of that this J's plate wouldn't fit.

Edit: just realised they are for an offset balljoint. Probably won't fit because the stock balljoint is centralised.
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Old Aug 14, 2017 | 04:35 AM
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Are the back of the standard ones flat though?
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Old Aug 14, 2017 | 04:46 AM
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because these are for the offset ball joints you'll have a lip protruding one side, not a big deal but If i was you i would buy some 10mm aluminium sheet and longer bolts and make your own
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Old Aug 14, 2017 | 04:58 AM
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May be that they are for an offset ball joint only ? would need to measure with oem correctly too check or may get too much positive camber.
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Old Aug 14, 2017 | 04:58 AM
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Originally Posted by Andy_F
​​​​​So, I've found this:

J'S RACING S2000 Roll Center Adjuster Plate L2 6TWO1 HONDA TUNING

Which is exactly for a set of the gold plates I pictured earlier - but it states "It cannot be used with other camber joints or with the stock parts." Doesn't really make sense to me as the hole centres must be spaced the same as stock, I'll take another look at my stock balljoints this eve.



Thanks Mark, had already looked at the Hard Race ones but I'm loathed to pay £200 quid for a balljoint, especially when there isn't really any need. Just trying to understand why you can't shim/space up from the stock ones.

Not sure if they will work with the standard ball joints as the standard ball joint protudes out the top of the holder only slightly but double check before you order , i have made my own 13mm aluminium bar milled to the correct shape and groved to miss the top of the ball joint, also made rack spacers all in cot me £15





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