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9-3 Sedan, Cabrio ('04+)/Combi & 9-3X Workshop 9-3 SportSedan, Convertible ('04+)/Combi & 9-3X , 2003 - 2012 Technical Forum

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  #1  
Old 22nd February 2010
icecold328 icecold328 is offline
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Default Tire pressure

So i know normally sedans have 31 psi in tires. but i heard that saabs should be different?

and different pressures gives more economy while driving or comfort.

can some one tell me what should my tire pressure should be for a 05 saab 9-3ss 2.0t

i rather ride for economy than comfort btw.

thnx in advance
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  #2  
Old 22nd February 2010
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It's located on your frame inside the driver's door.
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Old 22nd February 2010
OlegShv OlegShv is offline
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Check the manual. My 2006 says it should be 35 psi.
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Old 22nd February 2010
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Silver0393 Silver0393 is offline
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I have 215/60/15 tires and keep them around 36-38 PSI.
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Old 22nd February 2010
icecold328 icecold328 is offline
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Default thnx

I think i am gonna take it up to 38PSI, for more economy.

thnx
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Old 22nd February 2010
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The only problem with this is that I noticed I dont have as much grip to the road when its raining, but then again I do have cheap tires.
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  #7  
Old 22nd February 2010
grett9-3 grett9-3 is offline
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Quote:
Originally Posted by icecold328 View Post
I think i am gonna take it up to 38PSI, for more economy.

thnx
depends on what kind of tires you have
size, all season, winter, summer
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  #8  
Old 22nd February 2010
icecold328 icecold328 is offline
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Default tire pressure

This is my theory on tire pressures and road conditions--- while staying with in the limits of too low--too high.

Snow-- high tire pressure= lower surface area, cuts through the snow, rather than sliding over it.
rain--- low-to-normal tire pressure= increase surface area to get more grip.
dry-- low tire pressure for comfort. high tire pressure for economy. Or normal-low tire pressure for handling.

From what i gather from the info that i found and heard from u guys.... our range is 32-38 psi (30-42, for extremes)

I am gonna take my pressure to 36 tomorrow.

Bil~
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Old 22nd February 2010
icecold328 icecold328 is offline
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Default my tires

its too cold and late to run outside right now. but i know i have 16R tires. nothing special. i believe they are stock all season tires. normal width and height. at this moment the fronts would barely pass inspection.

bil~
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  #10  
Old 22nd February 2010
icecold328 icecold328 is offline
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Default Updating turbo?

can we update our turbo?

how hard would it be to update the turbo?
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Old 23rd February 2010
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tire pressures is on a sticker on the inside right of the g/box door.

different pressures on whether the car is fully loaded with passengers & luggage & other combinations of loads...
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  #12  
Old 23rd February 2010
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In snowy/icy conditions, you're not going to get enough crowning of the tire without vastly exceeding the tire's maximum pressure to get a huge reduction in the frontal width to push noticably through the snow; you're best bet is to keep them normal pressure or slightly lower, so that the tire can work the way its designed, and so the little bit of extra deformation tangentially as it rolls will create a little more heat in the tires, increasing their grip slightly.

For handling, normal pressures are good; if you want to increase the responsiveness and grip in the front, add a couple psi to the front tires since it stiffens them up and makes the car slightly less understeer-biased. letting a couple psi out of the rears will reduce the understeer slightly too, but reducing pressure will make the tires heat up more (and possibly too much, reducing grip further), increases wear in normal situations, and makes them less responsive/more unpredictable.
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