# 04/22/2007 ECC-N WNY Event 1 Thread

**URL:** <https://forums.speedlife.net/t/04-22-2007-ecc-n-wny-event-1-thread/27647>\
**Category:** NYSpeed Automotive\
**Created:** [April 14, 2007, 8:20pm UTC](https://forums.speedlife.net/t/04-22-2007-ecc-n-wny-event-1-thread/27647 "2007-04-14T20:20:53Z")\
**Posts on this page:** 1\
**Showing post:** 244

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**Author:** ![fairgentleman\_Z](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/fairgentleman_z/32/7263_2.png) [@fairgentleman\_Z](https://forums.speedlife.net/u/fairgentleman_Z)\
**Post date:** [April 23, 2007, 6:14am UTC](https://forums.speedlife.net/t/04-22-2007-ecc-n-wny-event-1-thread/27647/244 "2007-04-23T06:14:11Z")

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[quote=“Zong,post:243,topic:27647"”]

2 psi lower than the beginning of the day. I started at 42f, 41r. Backed off to 42f, 39r

[/quote]

Yeah, lowering rear tire pressure will make it even **more** loose.

[quote=“fairgentleman Z,post:124,topic:27647"”]

Nah all that does is reduce the contact patch, be brave, **less tire pressure in the rear = lower cornering stiffness in the rear:**

**Cf\*a - Cr\*b \> 0 = oversteer** Cf\*a - Cr\*b = 0 = nuetral steer Cf\*a - Cr\*b \< 0 = understeer

For FWD car a is small…

For example a FWD car with 63/37 weight dist a would = 37 and b = 63. Therefore to approach neutral steer the cornering stiffness of the rear should be lower (achieved by running a lower tire pressure).

**It’s just that overpressurizing the rear is prefered as it is much easier to control.**

[/quote]

I hope that people read this, learn from your unfortunate mistake, and understand tire pressures more. **Lowering pressure in the rear does not increase grip by increasing the contact patch, it makes the sidewalls softer = oversteer.**

Think of it this way:

two flat tires up front = big push  
two flat tires out back = big rotation

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