Tyre pressure help

[Jimbo2000]

hi all.

doing an advanced driving course tomorrow and they ask that you have your tyres inflated to freeway/full load pressure

i dont have a plaque thingy inside my door telling me the pressure:(

they are 17*9 rims with 235's all round anyone know the pressures, are they always the same no matter which tyre

normal/full load?

[Craved]

well for a track day, i would be putting around 40psi front and 38 psi rear (if you get normal oversteer)!!!

that is more than they say on those plaques but shoudl make it handle alot better and give more response!!

oh by the way it is illegal not to have that plaque inside the door/on the car!!!

where are you doing this course?

[Jimbo2000]

its the AAMI thing where if your olds are covered with AAMI you do it free if you are under 25

held at Quaker Hill somewhere

[Jimbo2000]

i think i have the original tyre placcard inside the door but it says for r33 wheels but i bought it with aftermarket wheels on

[Craved]

oh ok, fair enough!!!

if its not a track day thing then you shouldn't need to put them up that high!! anywhere between 34 and 40 would do but!!

[Jimbo2000]

cool and thats for 235's/low profile tyres

thanks

[JimX]

I would be putting 36 to 40psi in them, depending on what sort of tyres they are. The pressure limits should be listed on the tyre. Either way, my old Nankangs on the Commodore were only rated to 32psi but I ran them all day everyday at 36-38.

My current tyres have around a 50psi limit so they would probably be fine to around 55-60. But that's entirely useless so I generally run them at around 38-40 similar to what Craved said (more pressure up front).

[wrxhoon]

car tyres have 44psi max ( cold )jimx if u r tyres have 50psi u must have light truck tyres .i have 36 psi in mine ( cold )

[skyla]

I run 34 psi in my tyres (235x45x17), I use to run 38psi but I found that the centres of the back tyres were wearing out faster than the sides so I decreased the pressure abit, no problems now, good even tyre wear.

[Duncan]

yeah, don't go over 36psi cold, if you are driving hard you'll get another 10psi in them as they warm up. Good HOT temps would be 40-45 depending on the tyre manufacturer's recommendations.

You can go a bit lower with low profile tyres, but really you get better handling (and worse ride) the higher you run them - can make a quite amazing difference....