Moonface Roll Center Adjusters
09-18-2008, 06:06 PM
#1
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Moonface Roll Center Adjusters
As far as I know, there is not another roll center adjuster for the Z, but a definite must if your car is lowered.
http://cornerbalance.wordpress.com/2...nter-adjuster/
Three things happen when you lower your ride (other than it looking much better 
). You will:
1. Lower the center of gravity.
2. Change the suspension geometry that countless Japanese engineers (who also happen to be much smarter than you) had created for the car when it leaves the factory.
3. Lower the roll center that again, came preset by factory
When you lower a car, the distance between the center of gravity and the roll center increases, causing the roll stiffness to decrease, and voila you ended up inducing something you thought you were correcting - body roll. Sure you can mask this with stiffer springs and stiffer sway bars, but this is only a band-aid. If this is on your street car, stiffer springs also means a harsher ride.
The Moonface Roll Center Adjuster will raise the roll center up (without affecting the ride height) and bring the suspension geometry back into factory spec. This decreases the distance between the center of gravity and the roll center and as a result, drum roll please … less body roll.
Another byproduct of correcting the suspension geometry, is that you will increase turn-in speeds and reduce bumpsteer. Which if you don’t know … are good things
). You will:1. Lower the center of gravity.
2. Change the suspension geometry that countless Japanese engineers (who also happen to be much smarter than you) had created for the car when it leaves the factory.
3. Lower the roll center that again, came preset by factory
When you lower a car, the distance between the center of gravity and the roll center increases, causing the roll stiffness to decrease, and voila you ended up inducing something you thought you were correcting - body roll. Sure you can mask this with stiffer springs and stiffer sway bars, but this is only a band-aid. If this is on your street car, stiffer springs also means a harsher ride.
The Moonface Roll Center Adjuster will raise the roll center up (without affecting the ride height) and bring the suspension geometry back into factory spec. This decreases the distance between the center of gravity and the roll center and as a result, drum roll please … less body roll.
Another byproduct of correcting the suspension geometry, is that you will increase turn-in speeds and reduce bumpsteer. Which if you don’t know … are good things
Last edited by Moroccan_Mole; 09-18-2008 at 07:06 PM.
09-18-2008, 06:50 PM
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it typcially goes on the lower control arm on the front suspension, but with the way z's front a arm attaches to the hub, i'm not sure how this goes on.
OP, do you have pics of these installed?
my sister has these on her rsx (pls no "almighty" rsx jokes) and they did wonders. car handled and steered like **** when lowered, till i got these for her, now it drives like stock again
OP, do you have pics of these installed?
my sister has these on her rsx (pls no "almighty" rsx jokes) and they did wonders. car handled and steered like **** when lowered, till i got these for her, now it drives like stock again
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09-19-2008, 04:08 PM
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you've got it backwards I think - it would have to be longer than stock, in order to bring the lower control arm back to a position parallel to the ground. With the OEM one, the lower control arm would be in a pivoted position relative to the ground. If it was shorter than stock, it would further exaggerate the issue
this might help
left is stock, right is after install of RCA - different car, same affects though
edit - just to clarify, it's not the position of the arm that necessarily matters, but rather the plane that the two bushings (which are at opposite ends of the LCA) that is important - having these on a parallel plane is the important thing
this might help
left is stock, right is after install of RCA - different car, same affects though
edit - just to clarify, it's not the position of the arm that necessarily matters, but rather the plane that the two bushings (which are at opposite ends of the LCA) that is important - having these on a parallel plane is the important thing
Last edited by Z1 Performance; 09-19-2008 at 04:23 PM.
09-19-2008, 11:44 PM
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in the picture you posted in post 8, the longer ball joint corrects the problem because the lca is mounted under the hub mounting point. so that when the ball joint is longer, it puts the wheel side of the lca closer to the ground. but on the z, the lca is mounted the other way around, with the lca over the hub mounting point, so a longer ball joint would raise the the wheel side of the lca, causing it to be even further away from stock geometry
09-20-2008, 06:47 AM
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whomever does the first install for/with/us, we'll get pictures posted. The way it was explained to me, the stock one is pressed out and the new one installs from underneath
09-20-2008, 10:29 AM
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no rear kit offered as of yet - no idea if they plan on releasing one or not
really no way to make an adjustable kit that I can think of without compromising the strength of the part - any joint you have that is adjustable then becomes the flex point. I'll see if I can get some info as to what range of lowering they recommend this for
really no way to make an adjustable kit that I can think of without compromising the strength of the part - any joint you have that is adjustable then becomes the flex point. I'll see if I can get some info as to what range of lowering they recommend this for
09-20-2008, 01:23 PM
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Originally Posted by Beau
So why are roll center adjusters only $165 for 240SX's when it's virtually the same thing? $460 for 350Z adjusters? $295 difference when the product is very similar.
10-20-2008, 04:49 AM
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they're sitting in my house still - haven't had a bunch of time for car stuff lately between packing up the house for my move and work (october is my fiscal year end)