How stiff do you like it?

Post by **Stuart** » Wed Jun 20, 2007 7:11 am

My trackcar suspension you potty minded mucky pups

I currently use Spax adjustables dampers with their matched springs, nothing special I know, but I would like to reduce the amount of pitch and yaw I get particularly when going through a chicane.
I would like to consider springs, rollbars and also the spring rates too.

duncan · Post by **duncan** » Wed Jun 20, 2007 7:13 am

Whats the geometry set up at Stu?

RX7 · Post by **RX7** » Wed Jun 20, 2007 7:25 am

You have Spax suspension on the Skyline ?!!!!!? Just kidding I know it was dagenhams finest you are talking about !!

What is your budget ? Surely it would be better investing in some coilovers ?

Post by **Stuart** » Wed Jun 20, 2007 7:39 am

Geometry? no idea Dunk, but I can't see how that would reduce the amount of pitch and yaw?
There is no way that I want to spend the amount of money required on coilovers. Cheaper the better without cutting corners please

duncan · Post by **duncan** » Wed Jun 20, 2007 7:45 am

The reason I ask is - the roll that you say you are getting - is it reducing grip or is it just a sensation - looks flat as a pancake from outside the car.

Geometry would help the grip, turn in and handling characteristics for the price of a good night out.

Post by **Stuart** » Wed Jun 20, 2007 7:57 am

I was getting tyre scrub on the front offside due to body roll mate,so I have to stop that. The car feels ok on more open bends but rolls too much at corners like Russells and the Esses at Donny or Snett.
Take your point about the geometry though, just don't know what you can adjust on a car like mine

duncan · Post by **duncan** » Wed Jun 20, 2007 8:06 am

I am sure adjustments can be made to get rid of the scrubbing and bring a bit of neg camber to the party.

Post by **Stuart** » Wed Jun 20, 2007 8:23 am

Have sorted the arch for now with the help of Bart, a tow bar and some pliers. No idea about spring rates anyone?

duncan · Post by **duncan** » Wed Jun 20, 2007 8:37 am

What are they at the moment ?

Hard isnt necessarily good Stu - suspension travel helps keep the tyres on the ground. The lap times prove what is working and what isnt.

I would say 1 min 31 is working pretty good but with accurate geometry set up would be able to get that down.

Spend the money on springs if you want but if you have wheels pointing in different directions, caster angles all over the place, camber not set up and thrust angles that are causing problems then I would say it is money not very well spent

When the geometry is set up - using a tyre pyrometer you can measure tyres temps to find out whether the temps are even across the tyres and then take it from there. Being a tight wad myself, i would get the best from what is there before jumping to a diff set of problems.

Pike · Post by **Pike** » Wed Jun 20, 2007 8:39 am

How much does it weigh Stu?