Update 01-May-21 >> I've edited the title to include 'race suspension' in case anyone else has this issue, vanishingly rare though it probably is.
I've had the dampers on my CSR 260 reconditioned and I'm attempting to set the ride height. I'm aiming for what seem to be the generally recommended settings: 140mm front / 155 rear / 15mm rake.
Adjusting the spring platforms, I've set the front at 140mm no issues.
But ... I've got stuck trying to set the rear ride height as I can't get it higher than about 150mm.
Raising the spring platforms further doesn't seem to increase the ride height. At these settings, when I rest the car back on its wheels, there's little or no suspension droop/settle. So, not surprising I can't get it any higher - the suspension is fully extended when up on stands and is hardly compressing when resting on its wheels.
Some other info: the car has caterham 'CSR Race' springs fitted front and rear. The rear are 300lb rate. The car is on a flat / level floor. The pre-adjustment ride height was quite low at the back, around 137mm, so rake would have been close to zero.
So the question is, what ride height / rake should I be aiming for with a CSR 260, with 'race' springs and dampers?
- Should a CSR 260 with 'race' springs run lower than the usual 140mm/155mm heights?
- Am I measuring from the right point ... I'm using a point just in front of rear wheel arch, at the edge of the chassis rail and corner of vertical side panel.
- Something else ?
Pic - my rear ride height measurement location...
Any advice on this gratefully received - cheers!