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Old 04-25-2004, 01:17 AM   #1
Scooby Newbie
Member#: 53255
Join Date: Jan 2004
Location: St. Charles MO
2001 RSTi-silver
2005 STI-STG1

Default tire pressure

I have an 01 RS, with an ej20t swap-lots of STI and cusco parts and 4.44 gears, and am wondering what tire pressure to use. I have s03's and am thinking maybe 38-40 in front and 40-42 in rear. What do you think?
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Old 04-25-2004, 02:06 PM   #2
Scooby Newbie
Member#: 59471
Join Date: Apr 2004
Location: West Texas
2006 WRX Wagon
Crystal Gray


Can't comment on the absolute numbers as I haven't driven the S03s but have to question why you would want higher on the rear than the front. Grip is proportional to pressure and, as the scooby is nose heavy and very prone to understeer, you want to make sure you have as much grip up front as poss. Keep the front 2-5 pounds higher than the rear (unless you are taking your buddies to the golf course and have 4 sets of clubs in the trunk, when you need extra to stop the overloaded rear washing out).
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Old 04-25-2004, 03:23 PM   #3
Scooby Specialist
Member#: 15618
Join Date: Feb 2002
Chapter/Region: International
Location: Zhuhai, China

I hopr that the numbers you give us are for HOT pressures.
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Old 04-26-2004, 08:40 AM   #4
Scooby Freak
Scooby Specialist
Member#: 40751
Join Date: Jul 2003
Chapter/Region: Tri-State
Location: Springfield
'94 SER


Originally posted by perfusionista
Grip is proportional to pressure
Not exactly. The grip won't be as good when you get above the 'sweet spot'. The tires will feel better on higher pressures, with less sidewall flex, but when they are too high grip will fade.
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