what tire pressure are you guys running "on and off the track?" - Page 3 - 6SpeedOnline

#31

02-19-2009 | 03:25 PM

Minok

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Joined: Aug 2008

Posts: 1,282

From: Pacific Northwest

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Quote:

Originally Posted by mdrums

Actually the manual tells you that under a normal load...2 passanger and 1 suitcase up front that for the 2005-08 cars run 33/39 psi based off 68 degrees F. The 2009 manual tells you under normal load to run 34/39psi based off a normal load of 2 passangers and 1 suitcase at 68 degrees F.

The higher PSI are for 4 passangers and more luggage up front. How many of us drive around with that type of load? Not many I will guess.

Your car was delivered to you with higher PSI because Porsche and/or the receiving department at your dealer pumped them up to prevent flat spots.

Look in the manual and you will see the explaination for tire pressures.

I'll agree with you on that.. what they define as 'normal load' if thats what it is, is NOT normal. My car is empty (when I'm airing it up) or has my fat **** sitting in the drivers seat... thats it. IF, on some rare occasion, someone sits in the passengers seat, that is not normal. Two 20lb kids or some haul from the grocery store, home depot, hifi shop, in the back would be unusual. For the front.. there is only room for 1 suitcase.. though its mostly empty (Targa 4, after all).

I did look in the manual for tire pressures. That was the problem to begin with.. as it leads one to 3 pressure recommendations.

So, whats the right pressure to use if the car is empty (if I'm airing with my guage from outside the car)?

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