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Location:
Sydney
Registered:
June 2004
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Re: tire pressure ??
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Sat, 26 February 2005 17:42
 
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your best option would be to take it round your neighbourhood at different pressures to really notice the affects of the different rates in the tyres. being familiar with your local roads will allow you to really determine how they affect the drivability of your car at certain rates of pressure.
increasing/decreasing the pressure aint that hard at your local servo. different pressures are used for differnet reasons, 30psi is an all round even pressure that is for all sorts of driving. increasing/decreasing the pressures will affect the way the car handles, accelerates, brakes, etc. all these factor in to the equation when selecting a tyre pressure to suit.
also it is not just about putting the same amount of pressure into all 4 tyres. depending on the setup of your car (FWD, RWD or 4WD) and how it has been tuned you would need to test the car to determine the best pressures to have.
continuing on with the driveability of the car you could even have different pressures with each tyre. now this would be more in circuit racing scenarios but none the less i believe that tyre pressure is a MAJOR part of the car all round. you need to factor in that the tyre pressure of the car will change what happens when accelerating, cornering, braking, handling, tyre wear, brake wear, the change in temps caused by the different pressures on the tyres/pads/rotors.
further to this you would need to consider what rate springs you have and the type of dampers/shocks on the car.
for example on a RWD car increasing the pressures will allow cornering to be better but the downfall is that the rear end can slide out alot easier. reducing the pressure will increase the traction of the rear but is then compensated by the lack of cornerability (is that a real word?  ). so you would think that having a lower pressure on the rear than the front would be ideal true? well in essence yes but then you need to negotiate the ratio of the 2, basically how much more should the front have to the rear OR how much less the rear should have to the front. this ratio will determine the best setup for the car.
now once you have this ratio you can then easily manipulate the pressure dependent on what roads you will be driving on, the weather conditions and how you will be driving at that particular time. as for having 4 dfferent pressures in each tyre well we wont get into that now cause i doubt your talking bout circuit racing scenarios
at the end of the day tuning a car is not that easy and picking the right pressures is just as hard. most people tune their cars for MAX power output and torque and you would need to select the right tyre pressure based on how the car has been tuned and setup/configured, ie de-tuning your car slightly will allow you to increase the tyre pressure (maintaining traction) and hence better your cornering ability AND tuning it to its peak will require you to decrease tyre pressure to maintain traction but will reduce your cornering ability.
you need to decide and find a medium and then work from there. WELL THATS HOW I SEE IT ANYWAY 
PS cant wait to read the comments from this post 
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| | Subject | Poster | Date |
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tire pressure ??
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Moonbreaker | Sat, 26 February 2005 12:31 |
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Re: tire pressure ??
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Norbie | Sat, 26 February 2005 12:51 |
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Re: tire pressure ??
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Moonbreaker | Sat, 26 February 2005 14:18 |
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Re: tire pressure ??
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fade-e | Sat, 26 February 2005 17:42 |
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Re: tire pressure ??
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Stefan | Mon, 28 February 2005 02:03 |
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Re: tire pressure ??
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fade-e | Mon, 28 February 2005 02:31 |
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Re: tire pressure ??
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Celica_John | Sat, 26 February 2005 23:10 |
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Re: tire pressure ??
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Moonbreaker | Sun, 27 February 2005 03:01 |
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Re: tire pressure ??
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Toobs | Sun, 27 February 2005 12:22 |
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Re: tire pressure ??
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Bill Sherwood | Mon, 28 February 2005 02:10 |
