10-23-2013, 06:45 AM
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#1
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Registered User
Join Date: Oct 2008
Location: O.C. CA
Posts: 3,709
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If your Hi-Perf tires allow you to stop 5-10 feet sooner than other tires & thereby avoid a collision anytime during the year or 2 they are on your car they have more than paid for themselves regardless of their cost.
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10-24-2013, 08:01 PM
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#2
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Registered User
Join Date: Apr 2004
Posts: 89
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Personally, I rely on my ABS brakes to stop my car, not my tyre. Your tyres would have to be catastrophically bad for the car to keep sliding forward during a braking maneuver.
__________________
--1989 Mazda MX6 GT
--1997 Porsche Boxster
--2005 Lexus RX330
--2007 Maserati Quattroporte Sport GT
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10-24-2013, 08:52 PM
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#3
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Certified Boxster Addict
Join Date: Nov 2010
Location: Los Angeles
Posts: 7,669
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Quote:
Originally Posted by Jinster
Personally, I rely on my ABS brakes to stop my car, not my tyre. Your tyres would have to be catastrophically bad for the car to keep sliding forward during a braking maneuver.
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Stopping distance is a function of grip - even with ABS.
Check this out:
Comparison testing from Tire Rack for different brands/models of tires. All tires were the same size. Performance tires were tested on a 2008 BMW 328i with ABS/non-performance tires were tested on a 2011 BMW 328i with ABS.
The performance tires stop ~18 feet shorter than the non-performance tires in the dry. The difference in the wet is even bigger.
Tires make a huge difference in how your car will perform (e.g., cornering g-load ability varies just as much). Choose wisely.
Non-Performance Tires
Performance Tires
__________________
1999 996 C2 - sold - bought back - sold for more
1997 Spec Boxster BSR #254
1979 911 SC
POC Licensed DE/TT Instructor
Last edited by thstone; 10-24-2013 at 09:17 PM.
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10-25-2013, 01:07 AM
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#4
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Registered User
Join Date: Jul 2013
Location: Oslo, Norway
Posts: 325
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Quote:
Originally Posted by Jinster
Personally, I rely on my ABS brakes to stop my car, not my tyre. Your tyres would have to be catastrophically bad for the car to keep sliding forward during a braking maneuver.
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That is an ignorant and stupid attitude.
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10-25-2013, 01:38 AM
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#5
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Registered User
Join Date: Sep 2013
Location: Montreal, QC. (currently expat to Shanghai)
Posts: 3,249
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Quote:
Originally Posted by haz
That is an ignorant and stupid attitude.
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lol ouch, that's a bit of an apocalyptic opinion of s'one's reasoning, Haz!
He is right. The "surface's grip and condition" defines the braking attitude of most street legal vehicles. The chart you see above is plain and simple marketing hooks for guys like yourself.
You'd think an old flat asphalt/conccrete covered with oil, fuel and coolant contaminents (i.e. most roads today) would define the braking power of a TIRE?! You got to be having a laugh mate. ABS tech, brake pad & rotor materials, temp, speed, makes smart 'charts', not rubber lol
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'97 Boxster base model 2.5L, Guards Red/Tan leather, with a new but old Alpine am/fm radio.
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10-25-2013, 02:32 AM
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#6
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Registered User
Join Date: May 2008
Location: Toronto
Posts: 2,656
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Quote:
Originally Posted by haz
That is an ignorant and stupid attitude.
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It's a popular attitude.
"I don't need winter tires because I have AWD!"
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10-25-2013, 03:18 AM
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#7
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Registered User
Join Date: Sep 2013
Location: Montreal, QC. (currently expat to Shanghai)
Posts: 3,249
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Wasn't saying that only tech should be relied on, tires (compound types?) are also very important.
However when it comes to tire figures (charts), this is pretty irrelevant given the conditions of the roads today.
Thstone's charts/figures are usefull on a track associated with a diff abrasivity type, and I am sure this is what only matters to him anyway. However on a bumpy, oily, wet, street, you can kiss the manufacturers for their ABS technologies being somehow more effective than the dumb rubber.
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'97 Boxster base model 2.5L, Guards Red/Tan leather, with a new but old Alpine am/fm radio.
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10-25-2013, 10:06 AM
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#8
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Registered User
Join Date: Apr 2011
Location: DFW
Posts: 713
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Quote:
Originally Posted by haz
That is an ignorant and stupid attitude.
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Sorry Haz. Couldnt resist. 
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10-26-2013, 12:25 AM
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#9
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Registered User
Join Date: Jul 2013
Location: Oslo, Norway
Posts: 325
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Quote:
Originally Posted by rp17
Sorry Haz. Couldnt resist.
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Ha ha ha...  I love that image myself
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10-25-2013, 06:39 AM
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#10
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Registered User
Join Date: Apr 2012
Location: Riverside, CA
Posts: 1,666
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Quote:
Originally Posted by Jinster
Personally, I rely on my ABS brakes to stop my car, not my tyre. Your tyres would have to be catastrophically bad for the car to keep sliding forward during a braking maneuver.
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Take a Porsche Performance Driving school and you will change your mind about this statement.
You can stop a Boxster faster by modulating your brakes to just before the ABS kicks in.
There are a few counter intuitive maneuvers for collision avoidance in the Boxster, that you will learn on the PPDS course.
Knowing the limits of your car and noticing the warnings that indicate impending loss of traction will keep you out of bad situations.
Sticky tires are good since your in full control when you are attached to the ground, and that allows you to avoid bad things in your path without crashing into or spinning out after the avoidance.
Just sayin that the PPDS course is a real eye opener and allow you to drive with much more confidence and give you the skills to avoid collisions and loss of control even on wet, soapy pavement, plus its incredibly fun and you'll make some new friends.
__________________
"It broke because it wants to be Upgraded "
2012 Porsche Performance Driving School - SanDiego region
2001 Boxster S, Top Speed muffler, (Fred's) Mini Morimotto Projectors, Tarret UDP,
Short Shifter, Touch Screen Dual Din Radio, 03 4 Bow glass Top (DD & Auto-X since May 17,2012)
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