Go Back   986 Forum - The Community for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Boxster Racing Forum

 
 
LinkBack Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 08-14-2012, 12:24 PM   #15
Track rat
 
Topless's Avatar
 
Join Date: Nov 2006
Location: Southern ID
Posts: 3,701
Garage
There are practical limits to running wider and everything is a tradeoff. We look at data a lot and we look at top finishers. What are they doing?

Here in SoCal we have tracks of every configuration, from tight technical 1.8 mile circuits to big sweeping 3rd/4th gear tracks, to 150mph+ super-speedways. I have run a lot with 255 tires up front during testing and rarely do I find a performance advantage. Never on a track with high speed straights above 120 mph. Top speed suffers in my car with 255s up front. With only 170 rwhp I don't think my car easily overcomes the added rolling resistance, windage, and rotational unsprung weight of the larger tires. Add 100rwhp (Cayman R or 3.6L motor) and we might get a different result because hp is king on a long, high speed straight.

So if you want to win your class, consider everything: running weight, RWHP, tire compound, track configuration, rotational weight, windage, rolling resistance, and then begin to make decisions about what your ideal contact patch will look like. Once you make some tire choices, go out and test them to see how well it is working, analyze, readjust. Now you are ready to win.

__________________
2009 Cayman 2.9L PDK (with a few tweaks)
PCA-GPX Chief Driving Instructor-Ret.
Topless is offline   Reply With Quote
 



Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 10:38 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2025, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2025 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page