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18" Tyre Pressures?

cdickinson

cdickinson

New member
Can anyone recommend tyre pressures for 225 40 18 fronts and 265 35 18 rears on an S2 Cab?
I've currently got them at 32psi all round - it feels ok, but was wondering out of interest what anyone else might be running?

Cheers,
Chris.
 
Just try different pressures, see what suits you.

If you want to push the car try 2 extra up front for a little lighter steering, and 2 less at the rear for more grip. If you want the back end out a bit more put a bit extra in the back and less in the front. What were you after?
 
I'm just looking for a nice neutral feel. I was happy with 32 in general but had a dodgy moment on a bumpy B road the other day that saw the front end jumping across the road. I can't in any way point directly at the tyres as the car still has the original suspension fitted (done 53k but I have replaced the castor mounts for 968 items as recommended when moving to larger wheels).

I've just tried it on 30 all round and it actually felt a bit more controlled and less skittish so I may just keep at this for a while. (I know a cab will be somewhat skittish anyway on 18's!)

I was just interested in other peoples experiences for comparison.

Thanks for your input.
 
Five years ago the blocks were £30 each. Call Exeter OPC for the best current price.

The most expensive bit is the eccentric bolt and you don't actualy need them, they are identical to the old ones
 
About £60 - 70. It's an upgrade I would recommend to anyone irrespective of what size wheels you have. Just an asside, you can't judge the performance and condition of your shockers from milage alone. Age is also a factor and despite your shock absorbers only being 53k miles old, the fact they are circa 15yrs old will mean they are way way past their best IMHO. Porsche should have specc'd their shock absorbers to be less robust so they would force more frequent replacement due to failing MOT. Because they are so robustly made they keep on going forever with deteriorating performance as time goes on, and as long as they keep passing the MOT people think they are OK when in actual fact they are far from OK. Soft shock absorbers are dangerous and vastly reduce your braking performance as well. You'd never contemplate not changing your brake fluid for 15yrs would you? Imagine the state of the oil in your shock absorbers after all this time.

My car is currently in getting new fresh suspension all round and I was paying special attention to the handling on the longish drive down to Promax last weekend so I could make a comparison to how the car feels with fresh suspension. Because I was concentrating so much on the suspension (when usually I don't really think about it) I noticed just how much the car lurches and moves around and the performance over small amplitude undulations in the road surface was shocking (no pun intended). It was almost like the suspension couldn't keep up with the undulations, the car body was almost moving perfectly out of phase with the undulations. At speed I can imagine the front end could easily become pretty unsettled. Also the dive under braking is pretty severe.

It might be time to consider a shock absorber refresh.
 
'ste944' - the 968 castor mounts provided a marked improvement in steering response, I paid approx £65 delivered from Exeter OPC.

Scott, fair point about knackered suspension - I think I'm trying to ignore the fact that I ought to give the suspension a full refresh, as you state everything is 15 years old!
I'll have to wait a while as I'm getting ready for a big bill in a few months - all belts, timing chain and ancillaries, plus front pads and discs!
Other than shocks and bushes, what else should be considered (costed!)?

 
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