Tire Fill frequency & colder months (997 C2S w/ 19")
#1
Tire Fill frequency & colder months (997 C2S w/ 19")
The temperature in New England has dropped about 25 degrees F between September and October.... so I attribute some of the pressure drop in my fronts to this...but another P-car owner told me he needs to fill his 19" tires quite frequently. Is this true? How often is "frequently" for the other daily drivers out there?
Also, what PSI do folks put in their fronts in the the Fall Months in cold weather states? (997 C2S w/ 19")
-M
Also, what PSI do folks put in their fronts in the the Fall Months in cold weather states? (997 C2S w/ 19")
-M
#2
There are explanations at Tire Rack about the rise or drop in tire pressures relative to ambient temperature. I believe that once a tire is properly inflated it is not going to lose any more air at cold temperatures than at higher ones; obviously if you fill it with hot air (like my post?) it will drop some when it cools down. Lastly, and most important, certain Porsche tires should not be used when the temperature is going to be below 40F, so check this out.
#3
If you have to refill a tire more than once a month there might be a small leak. I've heard that 10 deg F equates to 1 psi. Regardless, once the pressure drops and is stable, you should only have to fill them once to have the proper pressure at that temperature (and then perhaps every 3 months to account for any normal leaking/deflating).
I'm in Chicago (similar weather to NE), and I'm running 32F and 38R right now. I'm thinking of dropping the pressure in the rear to 36 though to soften the ride (I hate these P Zero Rossos - they ride way too stiff and they don't grip all that well in any conditions).
I'm in Chicago (similar weather to NE), and I'm running 32F and 38R right now. I'm thinking of dropping the pressure in the rear to 36 though to soften the ride (I hate these P Zero Rossos - they ride way too stiff and they don't grip all that well in any conditions).
#4
If you have to refill a tire more than once a month there might be a small leak. I've heard that 10 deg F equates to 1 psi. Regardless, once the pressure drops and is stable, you should only have to fill them once to have the proper pressure at that temperature (and then perhaps every 3 months to account for any normal leaking/deflating).
I'm in Chicago (similar weather to NE), and I'm running 32F and 38R right now. I'm thinking of dropping the pressure in the rear to 36 though to soften the ride (I hate these P Zero Rossos - they ride way too stiff and they don't grip all that well in any conditions).
I'm in Chicago (similar weather to NE), and I'm running 32F and 38R right now. I'm thinking of dropping the pressure in the rear to 36 though to soften the ride (I hate these P Zero Rossos - they ride way too stiff and they don't grip all that well in any conditions).
#6
Leakage of about 1 lb per month is normal - more for older tires which become porous. For each 10 degrees, pressure change is just over 1/2lb - same for each 1000ft altitude change.
Tire should be checked at least monthly - early in the day before driving.
Good article: http://www.tirerack.com/tires/tirete....jsp?techid=73
Tire should be checked at least monthly - early in the day before driving.
Good article: http://www.tirerack.com/tires/tirete....jsp?techid=73
#7
Because he hates the P Zeros and wants to wear them out faster.
http://www.aa1car.com/library/tirepres.htm
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#9
winter
.................
I'm in Chicago (similar weather to NE)...........................I'm thinking of dropping the pressure in the rear to 36 though to soften the ride (I hate these P Zero Rossos - they ride way too stiff and they don't grip all that well in any conditions).
I'm in Chicago (similar weather to NE)...........................I'm thinking of dropping the pressure in the rear to 36 though to soften the ride (I hate these P Zero Rossos - they ride way too stiff and they don't grip all that well in any conditions).
From Tire Rack : "
Specific design techniques, raw materials and manufacturing methods have been incorporated to produce Pirelli's most comfortable Max Performance tires. Like all summer tires, PZero Rosso tires are not intended to be driven in near-freezing temperatures, through snow or on ice.
#10
These are one of the ones that should not be used for Winter driving;
From Tire Rack : "
Specific design techniques, raw materials and manufacturing methods have been incorporated to produce Pirelli's most comfortable Max Performance tires. Like all summer tires, PZero Rosso tires are not intended to be driven in near-freezing temperatures, through snow or on ice.
From Tire Rack : "
Specific design techniques, raw materials and manufacturing methods have been incorporated to produce Pirelli's most comfortable Max Performance tires. Like all summer tires, PZero Rosso tires are not intended to be driven in near-freezing temperatures, through snow or on ice.
#11
I saw carera classics take-off on local craiglslist couple of times, sometimes they are on ebay but there you get big chance to get cheap chinese replicas instead of original ones.
I have my 18" rims on a shelf with almost new PA2 on em already.
Last edited by utkinpol; 10-15-2009 at 02:39 PM.
#12
Because he hates the P Zeros and wants to wear them out faster.
http://www.aa1car.com/library/tirepres.htm
http://www.aa1car.com/library/tirepres.htm
#15
Other sources besides the boards are Porsche Panorama (club rag), and eBay.