Recommended Tire Pressure for AutoX

vasillalov · 08-04-2011, 09:34 PM

What would be the recommended tire pressure for AutoX events? I have stock type 162s with Pirelli PZero Nero tire (I know: not the greatest) and I am running them at stock tire pressure for the street.

Does one add X amounts of psi to each tire, or does one set them at a specific pressure?

Thanks for your time and help in advance.

The HACK · 08-05-2011, 11:04 AM

Go to a hardware supply store, get some chalk and mark some lines across the sidewalk and tread surface. Inspect the lines and see where they were scrubbed off. If the scrub stops right at the edge where the tread pattern stops and the sidewalk begins, you've got the right pressure. If the scrub goes past the tread edge onto part of the sidewalk, you're under-inflated. If the scrub doesn't come near the edge of the tread pattern, you're over-inflates. Add or subtract air accordingly. Your results WILL vary.

Start at 40 psi cold.

vasillalov · 08-05-2011, 01:28 PM

Quote:

Originally Posted by The HACK

Go to a hardware supply store, get some chalk and mark some lines across the sidewalk and tread surface. Inspect the lines and see where they were scrubbed off. If the scrub stops right at the edge where the tread pattern stops and the sidewalk begins, you've got the right pressure. If the scrub goes past the tread edge onto part of the sidewalk, you're under-inflated. If the scrub doesn't come near the edge of the tread pattern, you're over-inflates. Add or subtract air accordingly. Your results WILL vary.

Start at 40 psi cold.

Thank you Sir! I have some chalk at home already. My next AutoX event is this Sunday so I'll definitely use this tactic.

GaryS · 08-05-2011, 01:46 PM

Please do not drive on the sidewalk.

vasillalov · 08-05-2011, 01:58 PM

Quote:

Originally Posted by GaryS

Please do not drive on the sidewalk.

I won't, but my GF is always tempted....

The HACK · 08-05-2011, 06:52 PM

Quote:

Originally Posted by GaryS

Please do not drive on the sidewalk.

Stupid iPhone autocorrect.

vwong · 08-09-2011, 12:56 PM

I normally ran them at 48psi front, 40-42psi rear. This was with the Dunlop Direzza StarSpec tires in 235/40 and 255/35 sizes.

vasillalov · 08-09-2011, 04:33 PM

Quote:

Originally Posted by vwong

I normally ran them at 48psi front, 40-42psi rear. This was with the Dunlop Direzza StarSpec tires in 235/40 and 255/35 sizes.

Wow. Interesting...

I ran with 40-42 all around last Sunday, but that is on Pirelli PZero Nero AST. I know: the ASTs are hardly the best tire for AutoX.

Anything above 44psi on the front felt like the front was loosing grip too quickly...

08-04-2011, 09:34 PM	#1
vasillalov Mad Linux Guru On The Loose 1220 Rep 5,458 Posts Drives: 2008 335i Sedan, 2023 M3 Join Date: Aug 2009 Location: Chicago, IL iTrader: (5) Garage List 2023 BMW M3 [0.00] 2008 335i E90 [8.00]	Recommended Tire Pressure for AutoX What would be the recommended tire pressure for AutoX events? I have stock type 162s with Pirelli PZero Nero tire (I know: not the greatest) and I am running them at stock tire pressure for the street. Does one add X amounts of psi to each tire, or does one set them at a specific pressure? Thanks for your time and help in advance. __________________
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08-05-2011, 11:04 AM	#2
The HACK Midlife Crises Racing Silent but Deadly Class 1834 Rep 5,337 Posts Drives: 2006 MZ4C, 2021 Tesla Model 3 Join Date: Oct 2007 Location: Welcome to Jamaica have a nice day iTrader: (1)	Go to a hardware supply store, get some chalk and mark some lines across the sidewalk and tread surface. Inspect the lines and see where they were scrubbed off. If the scrub stops right at the edge where the tread pattern stops and the sidewalk begins, you've got the right pressure. If the scrub goes past the tread edge onto part of the sidewalk, you're under-inflated. If the scrub doesn't come near the edge of the tread pattern, you're over-inflates. Add or subtract air accordingly. Your results WILL vary. Start at 40 psi cold. __________________ Sitting on a beat-up office chair in front of a 5 year old computer in a basement floor, sipping on stale coffee watching a bunch of meaningless numbers scrolling aimlessly on a dimly lit 19” monitor.
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08-05-2011, 01:46 PM	#4
GaryS Colonel 39 Rep 2,084 Posts Drives: 2009 135i 6MT Join Date: Feb 2010 Location: Maryland iTrader: (0) Garage List 2009 135i [6.50]	Please do not drive on the sidewalk.
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08-09-2011, 12:56 PM	#7
vwong Lieutenant 31 Rep 595 Posts Drives: All Euro Join Date: Jul 2007 Location: SoCal iTrader: (3)	I normally ran them at 48psi front, 40-42psi rear. This was with the Dunlop Direzza StarSpec tires in 235/40 and 255/35 sizes. __________________ 2010 Audi S4 6MT 2009 BMW 335i Coupe 6MT YouTube Channel
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