Tyre pressures

[Baadfast]

Various sources I've read about tyres expound a couple of theories.
1/ Tyre pressure is determined by the car manufacturer and it's best to use their recommendation and add 4 psi as a starting point. The logic being that the tyres pressure is relative to the cars weight and not the tyre manufacturers specification. Imagine the same tyre on a MX5 and a Falcon XR6 using the same 35psi pressure, one of them surely isn't going to handle like it should ?
I've new Bridgestone 205/45/R16 on the rear and the 'local tyre guys' said 35psi. The 'Bridgestone technician' said car specification +4psi, which is 30psi. Mazda also say car specification +4psi.
My wheel alignment is heavily performance biased so wear isn't the issue ... staying on the road is.
I'll start with the lower and see how it goes ... thoughts chaps (doh ... and chapettes) ?

[jif]

I use anything from 30-35psi in 205/50 tyres. It was down to 28psi the other week, but I flagged that - it felt like the sidewalls were rolling over in corners!

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[zorruno]

I generally stick to 30psi on my 205/50 16 tyres. I've tried up to
40psi which was pretty horrible (a lot less grip in dry and wet), but
anything from 28-32 I don't notice much if any difference. My tyre wear
is pretty bad, but due to alignment setup not pressure.

cheers

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[Gravelben]

So what pressure would those in the know recommend for standard 14"s? Tyres are Dunlop LM600, I haven't actually checked the pressures since I bought it a few weeks ago.

[Stevo]

I have 185/60x14 Potenzas and run them at 32psi. Cheers Stevo

[Shermio]

Toyo T1R 205/45/R16 at 34-36 PSI I find it to be a good balance between grip and predictability...

[Paul Murray]

I run Dunlop Direzza DZ101 185/60/14 at 30 psi and tend to lose 2 psi over a 2-3 week period and notice a difference in the response in the rear maybe this could be a more noticeable sidewall flex when below 28 psi. Would be interested to hear from others who run the Direzza.