Tyre pressures

[Since-64]

Just wanted ask what tyre pressures most people are running in our Aus spec GT's. Picked my car up on Tuesday and dealer has pressures at 42 psi, tyre placard states 32 psi, thought somewhere around 36 - 38 would be more practical. Just after people's thoughts and recommendations.

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[MM Pony GT]

Just wanted ask what tyre pressures most people are running in our Aus spec GT's. Picked my car up on Tuesday and dealer has pressures at 42 psi, tyre placard states 32 psi, thought somewhere around 36 - 38 would be more practical. Just after people's thoughts and recommendations.

When cold, mine are around 35-36.
On the road with a bit of heat in them they're around 39-42 range.

 

[Since-64]

When cold, mine are around 35-36.
On the road with a bit of heat in them they're around 39-42 range.

Thanks for the quick reply, they're the sort of figures I was looking for. 35-36 cold with an increase of approx 4 psi when hot.

 

[Red Stang 302]

Just wanted ask what tyre pressures most people are running in our Aus spec GT's. Picked my car up on Tuesday and dealer has pressures at 42 psi, tyre placard states 32 psi, thought somewhere around 36 - 38 would be more practical. Just after people's thoughts and recommendations.

I would suggest those tyre pressures are far too high.

You should contact your dealer and ask for a partial refund on your 'Dealer Delivery Cost'.

If they can not get the Tyre Pressures right, what hope have they got in checking the 'More Technical' issues on the Pre Delivery checklist.

PS - You should buy yourself a good quality digital tyre pressure gauge.
Do not trust the Servo tyre pressure gauges.

I have my own compressor and always add air and check my pressures when the tyres are cold, ie, first thing before I drive it.

Currently I run 38 psi in the front and 36 psi in the rear, on my HSV Clubsport R8.
I will probably try these settings on my pony when it arrives.

Having owned several SS Commodores and Clubsports, I have found with the heavy V8 on the front axle, they handle better with increased pressure in the front compared to the rear.

 

[Aus-MustangGT]

Also fill your tyres with nitrogen, it helps

 

[Since-64]

Thanks for the quick reply guys, as I said only picked the car up on Tuesday but last night was the first time to actually have a play and check the tyre pressures as I have been working 12 hr day shifts. This weekend will be the first time for a proper drive, will be doing the length of the Great Ocean Road to Warrnambool and back. Looking forward to it. Will adjust tyre pressures tonight to about 36 psi cold.

 

[MC]

Currently I run 38 psi in the front and 36 psi in the rear, on my HSV Clubsport R8.
I will probably try these settings on my pony when it arrives.

Having owned several SS Commodores and Clubsports, I have found with the heavy V8 on the front axle, they handle better with increased pressure in the front compared to the rear.

I agree with this strategy. Also should do higher on front than rear in FWD for similar reasons. Probably would do 36 all round on an Ecoboost. Running on 32 is to stop certain people saying "the car's too uncomfortable".

 

[tarabrae]

Also fill your tyres with nitrogen, it helps

I try to make sure mine have at least 78% nitrogen.

 

[mwizz]

Where can you get the nitrogen?

 

[Bobsp12]

Where can you get the nitrogen?

As above...you get 78% everytime you breathe in....;)

 

[tarabrae]

As above...you get 78% everytime you breathe in....;)

...and then just put your mouth over the nozzle and blow. Hard. :bolt:

 

[Burkey]

Step 1. Throw placard in the bin.
Your manufacturer isn't interested in the way your tyres wear. They want you to feel nice and comfortable.
An example...
My FG turbo ute (19 inch 35 series) states: 36psi (normal) 42psi MAX
Well, I ran those pressures and chomped the outer edges beyond belief.
After talking with the guy who knows a thing or two about tyres (sells them for a living) and a little bit of online search it turns out that 42 - 45 psi is quite normal for such a tyre...
Yes, it rides firm BUT the tyres feel MUCH more controlled (less sloppy) and they wear just fine.
It seems that the lower your profile, the higher your pressure as far as passenger car tyres are concerned.
I'm referring to the OE tyres in this case. Killed them VERY quickly by following the manufacturers recommendation. Never again.
Basically, you can only base your pressure on the wear patterns that YOU see, but I'd be heading toward the upper end of the placard for a starting point.

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