964 RS suspension setup
Discussion
Can anyone help give guidance on a standard RS setup as reference?
I have a 964 C2 with modified Porsche 993 RS Cup suspension.
We had originally a lot of negative camber dialled (f&r)with awesome turn in but with a lot of snap oversteer at the limit.
Now dialled front and back camber back 1/2 a degree and turn in is sloppy. How do i get more balance on sharper turn in without so much oversteer at the limit?
I have a 964 C2 with modified Porsche 993 RS Cup suspension.
We had originally a lot of negative camber dialled (f&r)with awesome turn in but with a lot of snap oversteer at the limit.
Now dialled front and back camber back 1/2 a degree and turn in is sloppy. How do i get more balance on sharper turn in without so much oversteer at the limit?
Std RS book figs for comparison are-
Fr
toe, +25' +5'
camber, -1deg +/- 10' max dif L to R 10'
caster 4 deg 25' +/- 15' mad dif L toR 15'
Toe dif angle @ 20 deg lock, 1 deg50' +/-30'
Rr
toe, +15' +/-5'
camber, -1deg 15' +/-10'
A decent pork alignment specialist- Parr, Tognola etc etc, is best to advise you really.
Fr
toe, +25' +5'
camber, -1deg +/- 10' max dif L to R 10'
caster 4 deg 25' +/- 15' mad dif L toR 15'
Toe dif angle @ 20 deg lock, 1 deg50' +/-30'
Rr
toe, +15' +/-5'
camber, -1deg 15' +/-10'
A decent pork alignment specialist- Parr, Tognola etc etc, is best to advise you really.
Snap oversteer with 993RS Cup suspension on a 964 is probably due to unsuitable bump settings of the rear shock. So since the package is stiff I presume you will be using it on track, so first of all keep running around 2 degrees negative all round and dial in more rear toe-in, maybe 20' or more per side.
Changing the ride height on the either end may also help as this moves the roll centre. If none of this makes sense, find a track specialist to set it up for you.
If I haave presumed wrong and you have the kit on a road car, sell it and buy something more suitable.
Changing the ride height on the either end may also help as this moves the roll centre. If none of this makes sense, find a track specialist to set it up for you.
If I haave presumed wrong and you have the kit on a road car, sell it and buy something more suitable.
What do you mean by mod cup suspension,what are you running exactly.
Turn in needs some extra toe on the front to help turn in,dont forget less camber will give you more contact at front for intial turn in,but less grip when leaning on it in fast loaded corners.
These cars are sensative to the correct rake as well,which will help your rear end!As colin has just said.
Sounds to me like you need it setting up
Turn in needs some extra toe on the front to help turn in,dont forget less camber will give you more contact at front for intial turn in,but less grip when leaning on it in fast loaded corners.
These cars are sensative to the correct rake as well,which will help your rear end!As colin has just said.
Sounds to me like you need it setting up
Thanks Ninenmeister & Burzel.
Yes I'm using it on track as a Time Trial Car in the Porsche Club South Africa Series.
Ran a GT3 last year (won class 7)
Now there's a lot of setup to do on this years car.
Its a 90 Carrera 2 LHD with 993RS Cup suspension,300hp motor mods, l/w flywheel,1240kg,full rollcage.
Will try your advise on -2deg and toe in with a specialist to setup. Dont see many 964RS here and are seeing them form the rear taking a beating in the series this year
Yes I'm using it on track as a Time Trial Car in the Porsche Club South Africa Series.
Ran a GT3 last year (won class 7)
Now there's a lot of setup to do on this years car.
Its a 90 Carrera 2 LHD with 993RS Cup suspension,300hp motor mods, l/w flywheel,1240kg,full rollcage.
Will try your advise on -2deg and toe in with a specialist to setup. Dont see many 964RS here and are seeing them form the rear taking a beating in the series this year
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