Anyone else lower the rear tire pressure?
04-13-2006, 11:35 AM
#1
Race Car
Thread Starter
Anyone else lower the rear tire pressure?
40psi is dang stiff for around town driving. I lowered it to 38psi. I'm thinking of going 34 all the way around. Any opinions?
04-13-2006, 01:03 PM
#3
Rennlist Member
I would only do it if you drive hard, so when heat builds up it creeps the psi back to or above 40psi.
On the extreme, at the track I start at 32psi Cold and creeps up to 40-41psi where it feels about right.
You will increase some grip but loose responsiveness if you drive around in the low 30s.
If you ask me, the 997 is incredibly confortable and plush around town, even in the NYC area where I live. My E46 M3 felt much "crashier"....
On the extreme, at the track I start at 32psi Cold and creeps up to 40-41psi where it feels about right.
You will increase some grip but loose responsiveness if you drive around in the low 30s.
If you ask me, the 997 is incredibly confortable and plush around town, even in the NYC area where I live. My E46 M3 felt much "crashier"....
04-13-2006, 01:20 PM
#4
I had my Michelin PS2's at 36 front, 42 back, based on some info I'd read about needing to keep the PS2's at a higher pressure than Porsche recommends, but I just took them back to 34 40, and the ride feels much softer. I can't imagine how soft the rears would feel at 34, and I wouldn't be tempted to try. The risk of sidewall damage, rim damage, and ncreased tire wear don't seem worth it.
What brand of tires do you have? I had Pirelli P Zero Rosso's when I first got the car, and had the dealer change them to PS2's, because I like their wet traction better. But they also seem more comfortable than the Rosso's, so you might want to switch tires if you don't have PS2's.
What brand of tires do you have? I had Pirelli P Zero Rosso's when I first got the car, and had the dealer change them to PS2's, because I like their wet traction better. But they also seem more comfortable than the Rosso's, so you might want to switch tires if you don't have PS2's.
Trending Topics
04-13-2006, 02:19 PM
#8
Three Wheelin'
Under-inflation can result in a tire failure and potential loss of control of the vehicle under emergency steering situations. Also, increase fuel cost and shorten tire life.
04-13-2006, 04:54 PM
#12
Poseur
Rennlist Member
Rennlist Member
Originally Posted by jumper5836
too low tire pressure wears the edges
too high tire pressure will wear the center
too high tire pressure will wear the center
The low profile tires have to be spot-on to maximise tire tread life.
dan
04-13-2006, 05:57 PM
#13
Race Car
Originally Posted by Edgy01
Too low a tire pressure and the centers will ALSO wear prematurely,--reason is the center of the tire flexes due to centrifical force and thus the centers wear out early, too.
The low profile tires have to be spot-on to maximise tire tread life.
dan
The low profile tires have to be spot-on to maximise tire tread life.
dan
Nice try for recovery but you are making a big stretch.
With the negative camber setting on the rear wheels, too low of a pressure and you''ll be driving on the belts before you know it.
04-13-2006, 07:32 PM
#15
Poseur
Rennlist Member
Rennlist Member
Originally Posted by 1999Porsche911
Nice try for recovery but you are making a big stretch. With the negative camber setting on the rear wheels, too low of a pressure and you''ll be driving on the belts before you know it.
With the negative camber setting on the rear wheels, too low of a pressure and you''ll be driving on the belts before you know it.Not attempting to do a 'catch.' With lower pressures we'll be riding on the shoulders, right?
Years ago we had problems trying to find the 'sweetspot' on LP tires because they didn't react like we were used to.
Dan
Last edited by Edgy01; 04-13-2006 at 07:52 PM.