HPC Ride Height advice - UPDATE

[finmac]

Well I have changed my wide CXRs (245/50 rears) for smaller Anthracite 8 spokes (205 rears). Output being ride height has dropped by nearly 2"'s and is now way too low.

 

I have a freestyle set up - Springs/dampers and adjustable ARB, car is wide track.

 

Looking for some advice as to a sensible starting point for front and rear ride heights please (car is primarily driven on road). Also where to measure the heights from on the car please?

 

I take it if I jack the car up and take the weight off the suspension its easy enough to adjust the spring platforms?

 

cheers

 

Edited by - finmac on 23 Apr 2011 20:18:35

[Pezky]

Blimey 2" drop

 

Anyway, basic ride height setting is front 140mm measured on the chassis rail in front of the pedal box. Rear 155mm measured in front of the rear wheel arch- the rear should be 15mm higher than the front.

 

Most people aim to set the lower front wishbones parallel to the ground but look for approx 70-80mm under sump.

 

Dampers should be easy enough to adjust.

[Stationary M25 Traveller]

And set heights with equivalent of your weight in the drivers seat.

 

In your location, I would look at sump clearance rather than parallel wishbones, then measure under chassis as described, then set rear 15mm higher.

[finmac]

Had another look this afternoon - sump at lowest point is down to 50mm or so, no chance of rolling a bottle of wine under it!

 

The other potential issue is the front spring platforms seem quite high already - so not a lot of space for further compression - probably 2cm MAX, any issues with compressing the spring so much?

 

Help please!!

 

Edited by - finmac on 23 Apr 2011 20:19:15

[Stationary M25 Traveller]

You don't want springs to become coil bound under compression ! I changed my fronts from 150 to 250 lb ..... smooths out the bumps nicely at speed, and keeps the sump clear on big dips

[Stationary M25 Traveller]

I take it if I jack the car up and take the weight off the suspension its easy enough to adjust the spring platforms?

Yes !

 

Once car lifted and secured, you can use the proper c-spanners (pair), or a pair of stubby crosshead screwdrivers to crack the locking rings apart, then one to turn as required before locking them up afterwards.