Jupiter said..

Mark _australia said..
I know that. I was asking how playing with tyre pressures is "asking for an accident". Exagerration much? If I run 34 instead of 32 am I playing with people's lives? No.

I suppose you are smart enough to know that a 2 PSI difference is not going to cause problems. And I am not talking about such a small margin. I am talking about cases when people believe more is good, a lot more is even better. If you want to turn it into a case to demonstrate you know more than me, and everybody else, then OK. What do I know? I always follow the guide lines. I hope you have no issue with that ?

I am not saying I know better.
But I do know that a 2psi difference is not going to cause problems - if that was the case we would see crashes all over the place due to a 2psi difference wouldn't we? Especially considering most people rarely check the tyres. The tyre placard would be 10x bigger and have all sorts or warnings about "1psi difference could be fatal" and there would be ads about it on TV.
So don't be silly - everything has a range of use. Every tyre will be just fine with +/- 4 psi for example. The 4psi rule accounts for temperature and different amounts of tyre flex, which the placard does not. It won't kill you - trust me.

Just to repeat - I don't know better than car manufacturers. But to claim that playing with pressures is fraught with danger is pure bullcrap.
You can say that you were referring to "cases when people believe more is good, a lot more is even better" but that is not what you said.
I referred to the 4psi rule that is a good one, and you said any change from tyre placard specs is "asking for accidents"

Are u saying that in Australia, where tyre pressures will vary 2psi at least just due to temp - that your placard in the Commodore is equally valid in NT and Tassie?
Of course not.

I am not being a smartarse. I'd rather everyone know the 4psi rule for safety. Far better than chicks driving around in a car already prone to understeer and the front tyres are at 20psi but they 'look' fine. Cos that's the reality of many motorists.

Like tuning downhaul by eye. 5mm makes a difference and will not wreck the sail.

Chook2 said..

I always follow the guide lines. I hope you have no issue with that ?

and it's a very sensible thing to do.

I'd bet that 80% of the cars in Australia have differing tyre pressures on each side of the vehicle rather than inflated to manufactures specifications.
I do try to monitor mine regularly and sometimes run down to 10 to 12 psi in deep sand/beach running and inflate to road pressures when returning to the tracks. I have an onboard air tank and high flow compressor and can reinflate all 4 tyres on my Patrol to hwy pressure in less than 2 mins.

It was all sounding very clever and enviable until you said 'Patrol'.