It would be nice if there was a JRZ representative on this forum. He or she could probably give some good insight and really help some people out.
I also believe there are a good amount of R35's with their systems installed.
I wonder what they believe would be the optimal configuration for the RS Pro's on our cars? (spring rates/ settings)
We all know their are books on setting up suspensions and this discussion could get rather lengthy, but maybe JRZ has enough data by now that they would recommend a set up.
Just a thought.
It's a very good thought, if another user has spent time and effort setting up their JRZ pro's and found some good settings, then this would at least give you a starting point, and from there you can tweek it to obtain the balance and compliance you prefer.
Suspension set-ups are a bit like wine, individuals have their preference on what they like!
What I will say is, depending on tyres used and roads driven, adjust the compression setting to obtain the preferred compliance, if too soft the car may hit the bumpstops too often or feel too vague in turn-in and left/right/left transitions (anti-roll bars also affect these last two points) If too hard, the car will feel too bumpy for you and hitting bumps will push the car upwards and tend to loose grip/thow off line in a corner.
Spring rates used also have a big effect on roll/dive/squat, but hopefully these will be in the ball park for the type of usage of the kit/car.
With rebound adjustments, you want to adjust to the soft side and feel how it makes the car feel. To soft and it will feel floaty and have and unstable feel at higher speeds, due to the car rising (rebounding) too quickly after a compression. Keep hardening the rebound by one click at a time L/R, but one end of the car at a time. As the rebound becomes too hard, the car will again start to loose grip/traction and feel harsh.
You can also adjust balance a small amount, the end that is too hard, loosing grip first.
Try and imagine in your head what the suspension is doing, in basic terms the springs are supporting the car, the compression damping in controlling how quickly the suspension will compress when hitting a bump, and the rebound how quickly the shock extends, against spring pressure. If set right, when a bump is hit, the wheel/tyre should follow the up-ramp of the bump (compression) and the down-ramp of the bump (rebound) with the car/chassis staying in the same plane, ie, not moving up or down.
If the compression is too hard, the up-ramp of the bump will try to 'launch' the car upwards, and at the peak of the bump the wheel may leave the ground (exaggerated!) and if the rebound is too hard, the wheel will take off at the peak as it cannot extend quick enough and follow the down-ramp of the bump. This loosin grip and feeling harsh when the wheel lands!
Also try to 'feel' and seperate what the front and rear of the car is doing, to help you understand what is happening.
Hope that helps in some small way.
Edited by Techevo, 27 November 2012 - 04:57 PM.