Ae 82 Fwd Set Up

[rx3 ip]

What is the starting point to set up this car for track/road racing work , has full roll cage & weight 900kg.
ie. what is the front & rear spring rate , sway bars front & rear size .. ?
this car has (already set up ): positive castors ... cambers : front approx 4 degree neg , rear 1.5 degrees neg.:confused:
needs more cornering ability on dog legs / tight sweeper as right now it pushes , but o.k. on 90 degree or fast sweeper:mad:

[Wojtek]

Hi,

What tyres are you using?
Is it a road car at all, ot just a race car?

Wojtek.

[rx3 ip]

it is a race car , improved productions 1600cc class , fully worked engine with close ratio box & lsd , running yoko a32 185 X 60 X 14
fully adjust.coil overs ( don't know the spring rates , but will check next week end )
the car just have corner weighted before the last race
I have just given the price for the Whiteline rear sway bars 20mm , but don't know what springs to get etc...
thanks for your help wojtek

Michael:cool:

[Wojtek]

Hi Michael.
These are my pure theoretical suggetions only;
front ~ 250-300 lbs/in
rear ~ 200-250 lbs/in

... but you will really need to let a suspension specialist look at your car and complete suspension set-up to come up with a matching package.

Regards,
Wojtek.

[rx3 ip]

Hi again Wojtek
I read your column for the Suzuki GTI springs rate , you mention to run apprx. 150 front & 450 rear , it is a lot harder at the back than front , and yet for my car you mention to run slightly less for the back .. they both FWD .
Is there any special reasons for this .. ?
Do I have to re set up / change oil weight / re-valve the shocks if I change the spring rates.. ? and up to how much difference in spring rates I can get away without resetting the shocks
Do you have any idea what spring rates the Mirage Cup cars are running front & rear

Thanks
Michael

[Wojtek]

Hi Michael,
The reason is spring to wheel motion ratio.
http://www.whiteline.com.au/faqsprings.htm#Motion ratio, what are we talking about?

Regards,
Wojtek.