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New 944 S2 owner!

ORIGINAL: Will1981 Ed, I'm waiting for Brian to call me back from Jasmine to see if he has some wheels in stock which I'll fit some AD08's too. In the meantime i'm going to order some more T1-R's for the rears as they are bald on the inner edge.
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If he has any of these.. 987.362.126.01 I'd be interested as I have 2 already The ones I have on the car are 987.362.126.00 useful website here [link]http://944racing.de/felgengewichte.php[/link]
Eric, My car has a fair bit of camber and also has the adjustable rear ARB so that's probably why I'm not experiencing any understeer (or i'm going to slowly).[:D]
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That's what I mentioned earlier in the thread - what hole is the rear bar on? I don't have much front camber - has yours got adjustable top mounts or did they just get the camber on the struts?
 
ORIGINAL: Eric_Oz_S2 In my experience, you can run a staggered setup quite effectively without understeer tendancies. I have run 225x16F + 245x16R (Hoosier R6) as well as 225x17F and 255x17R with very neutral handling. It is simply a matter of optimisng the camber and ARBs to suit. If you do experience understeer you could fit the 19mm adjustable rear sway bar. Have fun Eric
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In my recent but limited experience I havent really noticed any understeer whilst on track and I'm running 225f and 245r. I've always thought that part of the reason why rear tyres are wider is due to the fact they have to endure both forward, and lateral forces at the same time whilst the fronts do not. Under braking I imagine the forces are similar but differences in tyre sizes could, as already stated, be accounted for with suspension set up to suit or even different tyre pressures front v rear. Perhaps the square setup is preferred by racers to allow for one size fits all and therefore makes tyres changes on track that much simpler? Edd
 
I agree. I read about a lot of people recommending the square setup, but of the dozen or more 944s and 968s I have seen tracked or raced, none have had the square setup. I am running the 30mm front and 19mm rear on the softest setting and it is very neutral. This is with 350F and 225R helper springs.
 
I don't think racers choose tyre widths for anything other than lap times and meeting regs.. I guess when traction becomes a limiting factor in big power 944's then you have more of a case for wider rears. A quick search on rennlist brings up loads of threads, with opinions on both sides from experienced racers. For trackday drivers, it's certainly easier to manage the tyres if they are all the same. I don't see many trackday 944's with a square setup as it's extra cost to source the wheels. As I've said a few times, the rest of the setup also has an effect, as does driver preference. Adjustable arb's are going to help, but they are pretty expensive over here. I ran my 944 turbo (slightly modified road car that was sprinted by the previous owner & who won the BARC sprint series in it) on 225/245 and then tried 225 all round and preferred the balance of the latter, with the car a bit pointier under trail braking. No traction issues with the LSD working [:D] Leda shocks (with slightly stiffer spirngs & torsion bar), ARB's were std front, 19mm rear (middle hole).
 
I had a set of 225 tyres that came off a turbo running them all round, it was written off at brands when the driver lost the back end. Tony
 
ORIGINAL: Hilux
In the meantime i'm going to order some more T1-R's for the rears as they are bald on the inner edge.
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What suspension and settings do you run?
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The car is on KW-v3 but I'm unsure on the actual settings as this was done by RPM when I bought it. Here is a piture of the rear tyre...
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ORIGINAL: edh
ORIGINAL: Will1981 Ed, I'm waiting for Brian to call me back from Jasmine to see if he has some wheels in stock which I'll fit some AD08's too. In the meantime i'm going to order some more T1-R's for the rears as they are bald on the inner edge.
Click to expand...
If he has any of these.. 987.362.126.01 I'd be interested as I have 2 already The ones I have on the car are 987.362.126.00 useful website here [link]http://944racing.de/felgengewichte.php[/link]
Eric, My car has a fair bit of camber and also has the adjustable rear ARB so that's probably why I'm not experiencing any understeer (or i'm going to slowly).[:D]
Click to expand...
That's what I mentioned earlier in the thread - what hole is the rear bar on? I don't have much front camber - has yours got adjustable top mounts or did they just get the camber on the struts?
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I think mine has the solid top mounts but they are not adjustable, so I presume the camber is on the struts then? I need to have a proper look but the car is in the body shop at the moment.
 
The car is on KW-v3 but I'm unsure on the actual settings as this was done by RPM when I bought it. Here is a piture of the rear tyre...
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Odd not seen that before on rear tyres but have on soft front tyres where the front camber settings are quite extreme for much road use. Thats completely worn the shoulder off - very uneven wear - cant remember if camber or toe is fully adjustable on the rears but if so it might be excessive as the contact area is small so much less grip or the rear. Better bigger ARB`s will help. I had KW with W/M ARB`s and even temps and wear at the rears
 
It does seem quite an agressive set up but grips well on the track, I have the 968 arbs on my car. I'm in two minds about changing it to a more fast road/track set up as I enjoy driving it on the road, but its a little skittish on uneven surfaces at the moment.
 
ORIGINAL: Will1981 It does seem quite an agressive set up but grips well on the track, I have the 968 arbs on my car. I'm in two minds about changing it to a more fast road/track set up as I enjoy driving it on the road, but its a little skittish on uneven surfaces at the moment.
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I will dig out my geo that Promax did - it's quite conservative and drives very nicely on the road - in fact I was thinking about more front camber I also got KW recommendations for damper settings this morning - and promptly deleted the email! - I will post them up as well Spa/ Nurburgring Front Bump 1 Rebound 1 Rear Bump 0.5 Rebound 1.5 all turns from full hard At Donington they suggested I could go to a maximum of Bump F 0.5, R 0.25, leaving rebound unchanged, which is closer to the spec on the 968uk setup page [link]http://www.porsche968uk.co.uk/kw-suspension-setup-on-968.htm[/link] Bump is adjustable from underneath so no need to remove rears from the car. Ed
 
Id be interested to see these too, as Im about to have my geometry set and I have a clean sheet at the moment.
 
Good info there Ed, thanks. I'm thinking the main reason for mine being skittish is the ride height too, helper springs are almost fully compressed so I need to have a play around with it over winter.
 
the rear helpers should be fully compressed at rest. they should start to expand almost as soon as the car starts to lift up. that's how both emc and promax explained it to me.
 
Learning alot about these cars here Ed, thanks! Its a completley different animal to my Audi S4 which was just fast on track but no rewards in terms of feedback, but it was very capable on the road which i'd quite in the S2. 1650kg's [:D]
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A touch of understeer
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