tyre pressures

[Pete917]

I played around with my tyre pressures today to get the best feel or me.

I have:

245x45x16; and
215x55x16

I think Porsche recommend for my tyre combination 29/34 psi front/rear. I have ended up with 31/34 and the car feels much better as a result!

What do you guys use?

 

[phil pullinger]

Hi, I think you have it spot on there, but if you look at the gold coloured labels on the engine bay it says 2 bar front 3 bar rear.That is actually 29psi front 43 psi rear.The front is acceptable but 43psi rear is , i think way too excessive.

 

[Pete917]

I agree. $3psi is way to much. I had it at that and the car seemed skitish.... I like these settngs now. I did read somewhere that it is preferablw to have a 4/5 psi difference front to back

 

[3.2_fordy]

Phil The label on my car says 2 bar front & 2.5 bar rear, had no problems running at that

 

[Pete917]

I just noticed my car didnt seem to like the stated pressures. Getting them down towards 30 made alot of difference

 

[Mjonzo]

has there ever been an official explanation from Porsche/other expert as to why they quote such high rear tyre pressures for 911's? Are they really meant to be that pumped up? I noticed same for both my current 3.2 and previous 964. I remember trying the Porsche recommended psi for the rears on my 964 (think it was 44psi) and it made the rear seem rock hard and uncompromising..not to mention asking for a puncture on rural lanes. Did make it a tad more oversteery that i liked though [] I assume Porsche know what they are talking about so just wondered why they recommend such high pressures.

 

[hukent]

Tyre pressures are a relative thing, depends on tyre wall stiffness, tread pattern, how you drive the car, the only way to determine which is best for you, is experiment. The quoted pressures are usually a guide only.