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Tyre Pressure; What do you run...
Topic Started: Jul 1 2009, 11:29 PM (2,294 Views)
TeazzaBrembo
Stock
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xnickx,Jul 1 2009
08:41 PM
Street - Firenza ST08 - 225/40/18 40psi Cold
(don't laugh but they are really decent tyres :P )

Track - Toyo R888 - 235/45/17 20psi Cold

Hi, just wondering why the tyre pressure needs to be lower on the track???
what if i run on 34psi for track days????????
(my wheels are standard R17 215)
chur!!
cars are our life too!
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xnickx
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^^ You may thank me ^^
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Depends what kind of track day it is, drags maybe around the mid 20s, but around 30-35 would probably be ok for circuit :)

Now doing:
Front
18x8
Dunlop Direzza
40PSI
215/40/18

Rear
18x9
Kumho Esta 712
42PSI
225/40/18
Contacting me for parts

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JTMILLER
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That computer nerd
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30-35 on the circuit? :o
I pump my 215/45r17 and 225/40r18s up to 45 PSI (on the pump) then get out a gauge and they are usually around 40 then, then once they get a bit of heat in them recheck and lower to around 38,

Haven't blown one up yet :D
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Premature acceleration can lead to catastrophic outcomes.
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TeazzaBrembo
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thanks for the answers guys, im talking about circuit. w0ts the highs and lows of having high pressure???
chur
cars are our life too!
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alimac
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Canterbury, NZ
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My suspicion is that you probably want a lower pressure because you wil get higher temperatures, so you want the cold pressure a little lower to compensate. But having glanced at a few other replies on other forums, it seems that some say higher, some lower and some the same as road pressure. It all seems to come down to personal preference and how it changes the handling. The only consistent thing i found was that if you are going to experiment, you shold sart high and come down in pressure
Yellow RS200z 6MT
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Ads200
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Limited Edition
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215/45 stock 17"

45 psi.

No bullshit!
2002 Lexus is200 Caliente #29 of 75 or #29 of 80 - Who knows!
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yojimbo
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Hidden Dragon
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On the road it may be down to personal preference, but with decent motorsport tyres, it pays to follow the manufacturers reccomendations.

I have used everywhere from 9 psi to 38 in radial motorsport tyres, surprisingly less is usually better ( up to a point).

I tend to think if you need to run 40+ spi to get the right performance from your tyres - you need to spend more on tyres.
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