RIDE HEIGHT

[PIRATEPETE]

Can anyone tell me what is the standard ride height for the RS.? My car is 630mm front and 620 rear measured from ground to wheel arch lip. The reason for asking is i am thinking of raising the height to give more travel. I thought this may improve the way it handles bumpy roads. As i will not be doing any more track days this year, and drive through the winter.

I am also softening the ARBs. Also should the front not be lower than the back?.


Thanks

pete

 

[Melv]

Pete

According to 'Porsche 911 Technical Specifications', when car at quoted kerb weight with full fuel, spare wheel and tool kit:

Height adjustment mm 125 + or - 5 from wheel contact area to outer hex. head bolt of cross member mount on body.

Height adjustment mm 223 + or - 5 from wheel contact area to measurement surface on control arm.

Are you any the wiser???

Why do you want to slacken the ARB's?

Generally, RS's appear to sit lower at the rear, although the Germans seem to favour lower front end in the theory that it gives them better stability on the autobahn at speed.

 

[Laurence Gibbs]

If you alter the ride height you will need to recheck your toe' and camber settings as these can be affected by the change.

 

[Tony]

ORIGINAL: Melv


Generally, RS's appear to sit lower at the rear, although the Germans seem to favour lower front end in the theory that it gives them better stability on the autobahn at speed.

You're right Melv but it means minimal suspension travel before the car is on the bumpstops - at which point spring/damper rates, anti-roll bars all cease to function - perfect on a perfectly flat surface!

ARB settings are a personal thing and offer a means of compensating (to some degree) for different tyres/road conditions etc. the only way is to start from a known point (softest setting both ends) the adjust to taste!

Tony

 

[PIRATEPETE]

Melv

Thanks for that i am slightly wiser. I wish to experiment with the arbs as softening the car will give me a bit more grip over the winter on the crap roads. Also just want to play so i can tune the setup to optimum at track days. After all whats the point of adjustable suspension if you ignore it.

Ps what happened about your visit to Ringwood and my model cars?.

thanks

 

[Hacki]

Don´t know for an RS, for the Cup car it is adjustable. How low? It depends on what you use the car for. The camber also has an influence on the ride hight and the look that you describe. The ride hight is also part of the set up, e. g. lower or higher rear influences under- or oversteer. So, no general answer is possible. Try and find out. For track use a lot of camber and a very low car is probably the choice, for road use little camber (especially in the rear!) to keep the car controlable and more ride hight to save body and bodywork.
It´s fun to find out, I needed professional assistance. That helped a lot for my personal use, a mixture of road use and a few track days. A friend of mine used to run his Cup car a hell of a lot lower with way more camber using it on (modern!) tracks only. (...leaving me behind easily on the Nürburgring GP track)

It also helped to run on track behind other cars with different set up to see how the handle.....

Whatsoever, let us know your solution!

Rgds

Hacki

 

[Melv]

Cup Car is allegeldy 50mm below standard.

RS should be:
FRONT AXLE 125 +/-5mm from wheel contact area to outer hex. head bolt of cross member mount on body.

REAR AXLE 223 +/-5mm from wheel contact area to measurement surface on contol arm.

But just don't lower it as it can have a huge knock on effect on the set up and handling of the rest of the car. Full four wheel alignment recommended!!

As Hacki says, low set up with loads of camber (mines about -3 front and rear) is great on a smooth surface, but no doubt Hacki would leave his mate behind on the Nordschliefe where the bumps aren't exactly friendly to a track set up.....

 

[Hacki]

Gruss Melv!

100% correct, if you wanna be ejected into the good old Eifel forest try a fast lap on the Nordschleife with your set up!

All the best,

Hacki

 

[Melv]

ORIGINAL: Hacki

Gruss Melv!

100% correct, if you wanna be ejected into the good old Eifel forest try a fast lap on the Nordschleife with your set up!

All the best,

Hacki

Prob quicker in my motorhome!!

19min 57 seconds......[]

 

[ChrisW]

Thankyou all.

I will ask some serious questions --- and check it out.

 

[Damen]

Chris

If you have a standard light weight 964 RS, then I'd suggest going back to standard ride height. Too many cars have been messed around with, you'll notice the snow plow attitude and as a result they are a pig to drive on anything other than marble smooth surfaces.

Damen

 

[ChrisW]

ORIGINAL: Damen

Chris

If you have a standard light weight 964 RS, then I'd suggest going back to standard ride height. Too many cars have been messed around with, you'll notice the snow plow attitude and as a result they are a pig to drive on anything other than marble smooth surfaces.

Damen

Thanks Damen, I'll get it checked out.

I have two -- a LHD car which I am sure is at the correct height but has very old tyres on it that need replacing --- Toyo R888's a good idea ?

Then a RHD with very good PSCups but around 15+mm lower at the front, which I find very manageable by comparison to my GT3.

The GT3 is quite wayward on my country roads though it's running a road set-up with the softest anti-roll bar settings, PCCB's and PS2 tyres, following cambers and generally trying to find it's own way whenever the suspension's not loaded up in a curve. In fact, it's like skiing !

Chris.

 

[ianmcg]

Or this one...(and its a nice photo too IMHO)

 

[ChrisW]

Ian, that looks pretty good to me ... if you an be patient I'll post a pic of mine ...

Yes I know they are 17" Cup 2's --- rear's are the same as the Mags in size, fronts are 5mm wider --- ET 65 with 15mm spacers ---

 

[Melv]

I'd say yes, can compromise the handling.

Seems to be a German thang and they think it's more stable at speed on the autobahns.....

Gratuitous pic of a couple of Cup Cars below -you decide...

 

[ianmcg]

It was you that first pointed it out...is it hard to change or does it need new springs?

This one got me thinking:

 

[Ian964]

It does look at little low, here's mine:

 

[h_____]

Pictures look greaet! I think you need to measure it, or better still have it done proffessionally. I assume that ride height and rake are important to the handling of the car. I assume that the RSs *must* have adjustable platforms making it easy to adjust, but you need to do it on a set of scales to be sure of the effect, well at least if you do trackdays etc.

I'd be much more tempted to get the car setup properly and have the ride hieght adjustment as part of that. That way, they can corner wieght it at the same time (As well as check the other geometry settings).

Whilst on the subject, this is something I plan to do post my engine rebuild. I'll be back asking for setting on these things.....

 

[pncarrerars]

Does look a bit low at the front. As Melv says it must be a German thing as mine arrived from Berlin like that. It was wound as low as it would go.

Pete

 

[65 mat]

An engine rebuild h___?! What's the story ?