RCA's for DC2R

[VTECMACHINE]

Hi all,

I have recently sort of learnt what RCA's do, and in theory I think they will help my bumpsteer / skipping across corners I get at higher speeds on bumpier surfaces.

I know they are a big thing for the DC5R, EP3R guys for McPherson strut. However, who is using these on DC2/EG etc. Did they make a noticable difference? Are they worth it?
It seems (maybe?) that some are different lengths... what difference would this make?

Below is some info on RCA's...

stolen from JDMST

RCAs - Roll Center Adjusters, also called "Bump Steer Spacers" - are designed to eliminate "bump steer".

Bump steer is when your wheels steer themselves without input from the steering wheel. This undesirable steering is caused by bumps in the road or track interacting with improper length or angle of your suspension and steering linkages. You can often feel the bump steer as a jerk in the steering wheel to the right or left when you go over a bump or uneven pavement.

When you lower a car it changes the geometry of the steering control arms resulting in bump steer. The RCAs return the lower control arms to their correct geometry and help eliminate this bump steer problem.

Please note, if you have an exessivly lowered or stiffly sprung car, these will have less of an effect.



Source

[ChargeR]

You haven't mentioned the effect of roll centre adjusters on the actual roll centre. Bump steer is a result of the location of the steering arm relative to the instantaneous centre of the suspension and its only relation to the roll centre is that by moving the instantaneous centre of the suspension you are also moving the roll centre.

Measure your bump steer. There is no point changing something for a perceived gain when you can change something for a measured gain.

Changing the location of the lower control arm to knuckle pickup point is a backward way of correcting bump steer and has the affect of completely changing your camber curves and relocating your roll centre, which may not be desirable considering that the migration of the roll centre toward the ground is not as bad on a double wishbone Honda compared to a McPherson strut and that a low roll centre has certain advantages. You would be better of adjusting the location of the steering arms either by spacing the rack slightly or relocating tie rod fixing points.

[VTECMACHINE]

Thanks man. Still learning about this topic, and honestly don't know much.

[tinkerbell]

Hi all,

I have recently sort of learnt what RCA's do, and in theory I think they will help my bumpsteer / skipping across corners I get at higher speeds on bumpier surfaces.

what are your wheel alignment settings first?

[VTECMACHINE]

0.8mm toe out front, and 1.2mm toe out rear.

But still did the same with 0 toe all around, also 0 toe front, 0.8 toe out rear.