Tyre Pressures
- Thread starter Guest
- Start date
Conflicting with my previous advice that 34 front and 36 rear (cold) and keep them under 40 alround (hot) was the best compromise I have to say that lower pressures seem to generate more grip and more predictable slides. At Spa last monday and tuesday I followed Ian Barnsley's advice (Silverline) and reduced the Corsa's to 30 front and 32 rear hot and the grip and controlability were superb. On the road on P Zero Rosa's I use the factory. Hope this helps.
Just a cautionary tale......
Many many moons ago, a friend rolled his Lotus Cortina, on which he had fitted wider tyres than the stock. He was playing with pressures and lost it. As he was well known to his insurance company they checked out the car and refused to meet his claim due to 'tyres size and pressures outside recommended specification'.
Kevin's use of factory settings for road use seems like a sensible approach.
Seems like you would need the endorsement of your insurers every time you went out for a blast when pressure playing!!!
Many many moons ago, a friend rolled his Lotus Cortina, on which he had fitted wider tyres than the stock. He was playing with pressures and lost it. As he was well known to his insurance company they checked out the car and refused to meet his claim due to 'tyres size and pressures outside recommended specification'.
Kevin's use of factory settings for road use seems like a sensible approach.
Seems like you would need the endorsement of your insurers every time you went out for a blast when pressure playing!!!
Tim,
Good point, I have to say I tend to keep my driving style fairly conservative on the road and I'm therefore very comfortable with the performance offfered by the standard factory tyre pressures.
In the 70's when used to play with Imps the insurance co's were always keen to measure the capacity of hot looking Imps after if they crashed, its amazing how many were insured as 875cc but turned out to be 998cc, an easy get out for the insurance companies.
Regards
Good point, I have to say I tend to keep my driving style fairly conservative on the road and I'm therefore very comfortable with the performance offfered by the standard factory tyre pressures.
In the 70's when used to play with Imps the insurance co's were always keen to measure the capacity of hot looking Imps after if they crashed, its amazing how many were insured as 875cc but turned out to be 998cc, an easy get out for the insurance companies.
Regards
When the infamous Mrs C [COHEN NOT COOKE]received a visit from the ins inspector abt 6 months ago [bodywork damage only] car less than 6 months old Audi S3, first thing he did was check the tread depths all round ......................Beware they mean it now adays the rules are the rules !
The sticker on my bonnet says (for 18" wheels) - 36psi Front, 44psi Rear. That's what I think most people run for normal road use.
I agree with Richard, on my 1998 C2 running 18"'s its 36 & 44 or 42.
Obviuosly for a track day you should reduce these by a few bar so the temp when hot is of that above.
I would imagine that different models and wheel/tyre combinations would have different pressure though.
Obviuosly for a track day you should reduce these by a few bar so the temp when hot is of that above.
I would imagine that different models and wheel/tyre combinations would have different pressure though.
At 34/40psi they will be slightly underinflated, so expect more wear on the outer and inner edges. The tyres often wear more on the inner edges anyway (especially if the camber and tracking are slightly out) so if I were you I'd stick to the factory recommendations.
36/44 is correct for your tyres. Some people run them a bit lower, but it will affect wear, handling and fuel consumption accordingly.
ORIGINAL: THX911
...and in the future, no need to look in the book, just see at the back of the fuel flap []
My sticker is on the underside of the bonnet.......
There was an article in Autocar a few years ago when they were running an early 996 and the journalist described the ride, with sport suspension, as unyielding. An unoffical Porsche comment was that it would be OK to run the pressures 4psi lower front and back which would take some of the harshness out of the ride.
I tried dropping mine by 4psi all round and it does ease the ride slightly but did not appear to adversely affect the handling.
Terry
I tried dropping mine by 4psi all round and it does ease the ride slightly but did not appear to adversely affect the handling.
Terry
Paul Fraser
New member
44psi on the rear wore out the middle of my contis, now use 40psi.
I think that the recommended pressures are just right for road use, too low and it adversly affects handling. Although the centres do wear out first this is to be expected with such wide tyres spending most of the time goinig in a straight line. However plenty of twisty roads evens out the wear better. In fact all my recent tyres have become illegal due to edge wear first.
I have had 2 996C4s in the past both with sports suspension and spent most of my fun motoring in theYorkshire Dales, the Scottish Borders (where I live) and the Lake District, none of the roads can be described as smooth, (far from it) and yet the susspension was an excellent balance of refinement and handling. The motoring journo who said it was unyeilding is talking utter c..p, or he is Vectra man and not worthy of commenting on the best sports cars in the world.
I would hate to think what he would say about the sports suspension on my 996tt.
Iain
I have had 2 996C4s in the past both with sports suspension and spent most of my fun motoring in theYorkshire Dales, the Scottish Borders (where I live) and the Lake District, none of the roads can be described as smooth, (far from it) and yet the susspension was an excellent balance of refinement and handling. The motoring journo who said it was unyeilding is talking utter c..p, or he is Vectra man and not worthy of commenting on the best sports cars in the world.
I would hate to think what he would say about the sports suspension on my 996tt.
Iain
Posts made and opinions expressed are those of the individual forum members
Use of the Forum is subject to the Terms and Conditions
