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Roll center kit... are the current kits not as useful as one thinks?

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Old Nov 8, 2015 | 07:48 PM
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From: S. FLA
Roll center kit... are the current kits not as useful as one thinks?

I have been considering getting a roll center kit. But judging by the difference it raises the LCA and tie rod arm its seems useless. If we are lowering our cars 1.5-2" what measurable and actual "performance" and handling benefits are we getting by raising it .25"? Makes no sense (to me). If there were difference height units avaiable depending on how many inches you drop the car then i would be game. But are we (or I) spending $200 and 4 hrs of install for "piece of mind" and buying into a minuscule upgrade?

I am going to be on Flatout Suspension coilovers 10k | 11k, lowered to about 1.75-2in", F&R sways, rear adjustable toe & camber arms. I feel i have a solid setup but would rather use the $200 towards my corner balancing.

Looking for to some knowledge and insight!
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Old Nov 9, 2015 | 06:00 AM
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If you do indeed have a 2013 EVO, you posted in the wrong forum
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Old Nov 9, 2015 | 08:38 AM
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From: S. FLA
Originally Posted by MinusPrevious
If you do indeed have a 2013 EVO, you posted in the wrong forum
Why? is not not the same idea? Do we not have interchangable LCAs and similar suspension geometry? I posted in this section cause there are alot more people racing previous generation Evos than there are Xs'.
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Old Nov 9, 2015 | 01:36 PM
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I did my RCK after I did my coilovers. It was a noticeable enough difference in the front end that I didn't have to "look" for it to notice it. It wasn't a life changing transcendent change, but it was noticeable.


And it shouldn't take 4 hours to install. I would say 2, maybe 2.5 at most.
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Old Nov 9, 2015 | 01:48 PM
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Has more to do with geometry of the suspension and its proper function. Thinking the car is so low you cant adjust the suspension back to compensate for the drop. So yeah, in your case it might not be worth it.
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Old Nov 9, 2015 | 02:49 PM
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It has more to do with bumpsteer correction then roll center correction IMO. If you pay close attention, you'll notice it doesn't move the tie-rod pivot the same distance as the balljoint distance...
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Old Nov 9, 2015 | 07:06 PM
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Originally Posted by letsgetthisdone
I did my RCK after I did my coilovers. It was a noticeable enough difference in the front end that I didn't have to "look" for it to notice it. It wasn't a life changing transcendent change, but it was noticeable.


And it shouldn't take 4 hours to install. I would say 2, maybe 2.5 at most.
What difference did you feel exactly? More steering response?

Originally Posted by meckert
Has more to do with geometry of the suspension and its proper function. Thinking the car is so low you cant adjust the suspension back to compensate for the drop. So yeah, in your case it might not be worth it.
I completely understand what its ultimate goal. I just dont think the difference really does something with how little it actually moves things.

Originally Posted by 03whitegsr
It has more to do with bumpsteer correction then roll center correction IMO. If you pay close attention, you'll notice it doesn't move the tie-rod pivot the same distance as the balljoint distance...
Can you please explain this a little more? I know very little about suspension geometry.
Do you mean the difference between both parts makes a bigger difference overall?
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Old Nov 9, 2015 | 08:45 PM
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More front end grip at all times, except for very slow speed corners. Which is what I expected.
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Old Nov 10, 2015 | 08:26 AM
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Why do you want to lower you Evo so much?
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Old Nov 10, 2015 | 09:02 AM
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From: S. FLA
Originally Posted by mrfred
Why do you want to lower you Evo so much?
The plan is ~1.75 on a X. Not sure if that's alot on the 789. I want a lower center of gravity. And let's face it, it looks better. I am currently on GTWORX 1.25 and 5.5kg springs.

What are your thoughts?
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