just after some advice really, what tyre pressures do you lot run if you have 17"s??? am running 205/40 tyres on koni adjustables with a 30 mm drop, thanks in advance.

 

I run mine around 32psi, any lower than that i'd be worried about denting my rim on every bump and pot hole.

 

26 front 30 rear

 

That doesnt make any sense to me mate, if anything you have more in the front because of the extra weight of the engine etc... your back end would skip all over the place like that?!
Just my opinion, but also 26psi is way too low for a 17 205/40 you could almost push the tyre in the middle and feel the wheel

 

iv always used the magical 32psi figure also, on my vectra daily too, n only ever consider changing the rears if carrying an excessive load

 

I actually run 30psi in the rear because i have almost no load and want it to grip not skip about.

 

well my vectra daily regularly has a full compressor and spray equipment set up thrown in, so figure 32psi covers me so that im not running massively squashed sidewalls lol

plus 32psi seemed happy enough when i dropped my freshly built rs motor in the boot saturday night lol

 

26 to help grip in straight line little more tyre squash. you'll see once you get a little more to put on ground and sometimes more in rear if i want to try stop back from bogging down but if you want twisty settings then 30/32 all round would be a good compromise, and down as low as 20 for 1/4 action

 

Yeah i see what your saying!
Steering must be soooo heavy at 20psi!! Doesnt matter for 1/4 mile but must be crazy to maneuver it, lol

 

Also remember your front tyres heat up alot more than your rears (due to the extra weight over them and the fact there driving the car obviously ). So say you started at 26psi all round you may find that once up to temp your running 32 front, 28 rear for example

 

Thanks chaps, i will try the magical 32 then lol

 

another little thing i found out the other day is costco will now fill your tyres with nitrogen (i think thats the stuff) for free if your a member even if not fitting new rubber just turn up and they'll swap old for new free

 

advantages of that are ????.

dave.

 

i believe it's to do with it containing less water in it so retains it's pressure better at speeds were the heat builds up and gives better fuel economy

 

Nitrogen is widely used for tyre inflation in the motor sport and aviation sectors and in a number of European countries for car and commercial vehicle tyres.
The gas is inert and completely safe, making up 78% of breathable air.
Most importantly, by using it to reduce the concentration of oxygen in a tyre it is possible to equalise the partial pressure between the air inside each tyre and the surrounding atmosphere.
As a result, the common problem of slow deflation caused by oxygen slowly leaking through the tyre wall is virtually eliminated, thereby ensuring that tyres remain at their correct pressures between vehicle servicing.
This has the added benefits of improving fuel consumption and of enhancing safety by minimising the danger of under inflation.

 

I perfer 32psi but 30psi is ok as well.