Roll Center Adjusters?
#1
Roll Center Adjusters?
Preface: For those who dont know what an RCA is in this sense, its an adapter fitted between the stock hub and control arm in a macpherson strut setup aimed at correcting the camber curve on a lowered vehicle by moving the control arm back towards its "natural" position, effectively helping the lowered cars benefit from proper suspension gometry at their new ride heights.
So ive done some searches on here and a few other forums, and i must ask, why has nothing like this been created for our vehicles?
The idea appears to have been tossed around sometimes but i dont believe its ever turned into anything substantial, and yet it appears like it should be a fairly simple part to create for our cars and not too expensive either. My only point of concern is that in our vehicles, it would have to be fitted between the control arm balljoint and the control arm. So I suppose the question is, would the balljoint be stressed too much or put outside of its range of acceptable motion?
Let the discussion begin.
TYLER
So ive done some searches on here and a few other forums, and i must ask, why has nothing like this been created for our vehicles?
The idea appears to have been tossed around sometimes but i dont believe its ever turned into anything substantial, and yet it appears like it should be a fairly simple part to create for our cars and not too expensive either. My only point of concern is that in our vehicles, it would have to be fitted between the control arm balljoint and the control arm. So I suppose the question is, would the balljoint be stressed too much or put outside of its range of acceptable motion?
Let the discussion begin.
TYLER
#8
Preface: For those who dont know what an RCA is in this sense, its an adapter fitted between the stock hub and control arm in a macpherson strut setup aimed at correcting the camber curve on a lowered vehicle by moving the control arm back towards its "natural" position, effectively helping the lowered cars benefit from proper suspension gometry at their new ride heights.
So ive done some searches on here and a few other forums, and i must ask, why has nothing like this been created for our vehicles?
The idea appears to have been tossed around sometimes but i dont believe its ever turned into anything substantial, and yet it appears like it should be a fairly simple part to create for our cars and not too expensive either. My only point of concern is that in our vehicles, it would have to be fitted between the control arm balljoint and the control arm. So I suppose the question is, would the balljoint be stressed too much or put outside of its range of acceptable motion?
Let the discussion begin.
TYLER
So ive done some searches on here and a few other forums, and i must ask, why has nothing like this been created for our vehicles?
The idea appears to have been tossed around sometimes but i dont believe its ever turned into anything substantial, and yet it appears like it should be a fairly simple part to create for our cars and not too expensive either. My only point of concern is that in our vehicles, it would have to be fitted between the control arm balljoint and the control arm. So I suppose the question is, would the balljoint be stressed too much or put outside of its range of acceptable motion?
Let the discussion begin.
TYLER
The only reason why I ask that is because this is what hatchi owners call them. Other car guys call it other things like roll center kits and random names.
Anyways RCA's may change the camber curve slightly but it's not really intended for that, considering the camber gain through the motion of the wheel is very minimal on a macpherson suspension. It is more to correct the roll centers. Which is the axis on which your car rolls on. This is changed as you lower your vehicle, but making the Lower control arms sit more parallel to the ground puts it back to its original position.
Last edited by ninjlao; 10-04-2010 at 10:09 PM.
#9
Nope, not a AE owner, but have had an Mk2 MR2 before and found them to be a god send on that. And correct, they adjust the body roll center lower, back within a range closer to where the wheels lateral force is supplied to the suspension. Effectively increasing the cornering force the car can sustain before the suspension begins bearing some of the cornering load(allowing the base/desired alignment to have a wider range of static coverage) hence my statement earlier . Thanks for the catch as I realize my previous statement may have not been completely encompassing as to the benefits. I just felt this community would be more interested in retaining suspension geometry on "slammed" daily drivers, than in parts designed to enhance a vehicles performance capability. Cant help the skepticism from time to time
So when can we get these for the tc??? pretty please!?!
TYLER
So when can we get these for the tc??? pretty please!?!
TYLER
#10
Do you happen to own an AE86 by chance?
The only reason why I ask that is because this is what hatchi owners call them. Other car guys call it other things like roll center kits and random names.
Anyways RCA's may change the camber curve slightly but it's not really intended for that, considering the camber gain through the motion of the wheel is very minimal on a macpherson suspension. It is more to correct the roll centers. Which is the axis on which your car rolls on. This is changed as you lower your vehicle, but making the Lower control arms sit more parallel to the ground puts it back to its original position.
The only reason why I ask that is because this is what hatchi owners call them. Other car guys call it other things like roll center kits and random names.
Anyways RCA's may change the camber curve slightly but it's not really intended for that, considering the camber gain through the motion of the wheel is very minimal on a macpherson suspension. It is more to correct the roll centers. Which is the axis on which your car rolls on. This is changed as you lower your vehicle, but making the Lower control arms sit more parallel to the ground puts it back to its original position.
2. OP, I am interested in these, though mainly for adjusting the camber curve. Dropping the car more than 1" pushes it into positive-camber territory in bumps and aggressive driving--> camber wear and poor performance
3. I think there is little interest because Scion owners are not educated in the nuances of suspension geometry, don't know what they're missing.
#12
I am talking to TechnoToyTuning, the same ones who made the tie rod flip kit about making something. They say if we can get 10 people interested, they can make something similar to this for much less. I am currently having this developed for the celica. What someone needs to verify is if the tie rod from the 90s celica will fit. I know the camry and rav 4 is compatible. The tc later celicas etc.. have the same design, the dimensions of the mounting holes need to be compared.
So I will put a list here for a couple of days and if there is little response I will make a group buy thread.
01) cms-gt4
02)
03)
04)
05)
06)
07)
0
09)
10)
So I will put a list here for a couple of days and if there is little response I will make a group buy thread.
01) cms-gt4
02)
03)
04)
05)
06)
07)
0
09)
10)
#13
I am talking to TechnoToyTuning, the same ones who made the tie rod flip kit about making something. They say if we can get 10 people interested, they can make something similar to this for much less. I am currently having this developed for the celica. What someone needs to verify is if the tie rod from the 90s celica will fit. I know the camry and rav 4 is compatible. The tc later celicas etc.. have the same design, the dimensions of the mounting holes need to be compared.
So I will put a list here for a couple of days and if there is little response I will make a group buy thread.
01) cms-gt4
02)
03)
04)
05)
06)
07)
0
09)
10)
So I will put a list here for a couple of days and if there is little response I will make a group buy thread.
01) cms-gt4
02)
03)
04)
05)
06)
07)
0
09)
10)
#20