Go Back   PCA GT2, GT3 and Cup Car SIG Forums > GT2/GT3/Cup Car Register Discussions > AutoX, DE and Racing Discussions
Register Forums FAQs Search

AutoX, DE and Racing Discussions All discussions related autoxing, DE, amateur and professional racing activities

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 04-10-2011, 12:16 PM
FTS's Avatar
FTS FTS is offline
SIG Advocate
 
Join Date: Feb 2011
Location: Germantown, MD
Posts: 967
Downloads: 12
Uploads: 7
Garage
Default Blog on Cayman S vs. GT3

As I am looking at data, few interesting points about the cars and my driving emerge, so I thought I'll create a post about it to document over time.

Context:
  • 2006 Cayman S, stock with Sport Chrono and PASM, new R888 tires, PFC front rotors and Hawk HT-10 pads, weight w/half tank: 3056 lbs.
  • 2010 GT3, stock with Sport Chrono and new R888 tires, stock rotors, RS-19 pads, weight w/half tank: 3195 lbs (+139 lbs).
  • The CS data is from Zone 2 VIR event in March 2010, ambient temps ~40F
  • The GT3 data is from Zone 2 VIR event in March 2011, ambient temps ~40F
  • Same driver, but with the GT3 I have ~10-12 more track days.

First, here are how the GPS track map is, and how I configured my sectors on it:

Click the image to open in full size.

Next is each car's sector split timing, and min/max values per sector:

Click the image to open in full size.

And here are G-G plots for each car's fastest laps:

Click the image to open in full size.

To be continued...
__________________
Fatih Selekler
997.2 GT3

Last edited by FTS; 04-10-2011 at 02:01 PM.
Reply With Quote
  #2  
Old 04-10-2011, 11:57 PM
FTS's Avatar
FTS FTS is offline
SIG Advocate
 
Join Date: Feb 2011
Location: Germantown, MD
Posts: 967
Downloads: 12
Uploads: 7
Garage
Default T1 Through T3 Traces

Click the image to open in full size.
__________________
Fatih Selekler
997.2 GT3

Last edited by FTS; 04-11-2011 at 12:16 PM.
Reply With Quote
  #3  
Old 04-11-2011, 12:10 PM
Gator Bite's Avatar
Gator Bite Gator Bite is offline
Cayman Register Advocate
 
Join Date: Feb 2011
Posts: 182
Downloads: 0
Uploads: 0
Default Re: Blog on Cayman S vs. GT3

Fatih,

You are such a geek... I love it (and hope to be an equal geek someday).
Reply With Quote
  #4  
Old 04-11-2011, 12:17 PM
FTS's Avatar
FTS FTS is offline
SIG Advocate
 
Join Date: Feb 2011
Location: Germantown, MD
Posts: 967
Downloads: 12
Uploads: 7
Garage
Default Re: Blog on Cayman S vs. GT3



Yeah, I know. As I mentioned in another thread, I have to force myself to learn, this is the only way for me. Wait till you see my GT3 vs GT3 analysis, that one is absolutely nit picking
__________________
Fatih Selekler
997.2 GT3
Reply With Quote
  #5  
Old 04-12-2011, 01:16 PM
TRAKCAR's Avatar
TRAKCAR TRAKCAR is offline
Vice Advocate
 
Join Date: Feb 2011
Posts: 359
Downloads: 0
Uploads: 0
Garage
Default Re: Blog on Cayman S vs. GT3

Cool. Now get a coach and do the before and after in GT3!
__________________
Peter National PCA Instructor.
Pics and youtubes ==> Daily driver '10RS white/gold. White OEM RS roll bar, red schroth seat belts, CUP LSD, lip and Gurney, Sharky, V1, K40 laser blocker.

Sold '07GT3 white
Reply With Quote
  #6  
Old 04-12-2011, 01:36 PM
bman's Avatar
bman bman is offline
Registered Porsche Owner
 
Join Date: Feb 2011
Posts: 146
Downloads: 0
Uploads: 0
Default Re: Blog on Cayman S vs. GT3

Or let me drive it for comparison
Reply With Quote
  #7  
Old 04-12-2011, 01:38 PM
TRAKCAR's Avatar
TRAKCAR TRAKCAR is offline
Vice Advocate
 
Join Date: Feb 2011
Posts: 359
Downloads: 0
Uploads: 0
Garage
Default Re: Blog on Cayman S vs. GT3

Quote:
Or let me drive it for comparison

__________________
Peter National PCA Instructor.
Pics and youtubes ==> Daily driver '10RS white/gold. White OEM RS roll bar, red schroth seat belts, CUP LSD, lip and Gurney, Sharky, V1, K40 laser blocker.

Sold '07GT3 white
Reply With Quote
  #8  
Old 04-12-2011, 02:52 PM
FTS's Avatar
FTS FTS is offline
SIG Advocate
 
Join Date: Feb 2011
Location: Germantown, MD
Posts: 967
Downloads: 12
Uploads: 7
Garage
Default Re: Blog on Cayman S vs. GT3

^ what he said LOL.

Actually it is not a bad idea Brian. And we can also hook up my logger to your car and collect data for comparison.

By the way, I got a coach Ain't telling more
__________________
Fatih Selekler
997.2 GT3
Reply With Quote
  #9  
Old 06-25-2011, 09:58 AM
FTS's Avatar
FTS FTS is offline
SIG Advocate
 
Join Date: Feb 2011
Location: Germantown, MD
Posts: 967
Downloads: 12
Uploads: 7
Garage
Default Re: Blog on Cayman S vs. GT3

It is interesting that one magazine went to the extent to make some hard measurements on vehicle configurations and associated performance that actually validates our "feel."

Car and Driver has a test of Cayman R vs. 997.2 GT3 in their July issue. The results should not be surprising, but they got some data that is quite relevant. The most important numbers to me are the ones that no one goes out to measure, compare or publish, it is refreshing to see this mag went to that extent; they employed Cayman Dynamics, a company that specializes in vehicle dynamics with multi-million dollar equipment and engineering talent.

So, the GT3 CG height is 17.4" vs. 18" for Cayman R. The exact location of CG is not revealed though, and also keep in mind that the Cayman R sits 10 mm (0.4") lower that even Cayman S w/PASM.

GT3 Polar Moment of Inertia is 1184 ft-lb-sec(2) vs. Cayman R's 1515.

The Static Weight Distribution, GT3: 39(f)/61(r) vs. Cayman R: 45(f)/55(r)

Dynamic Weight Distribution, under acceleration, GT3: 26(f)/74(r), CR: 33(f)/67(r)

Dynamic Weight Distribution, under braking, GT3: 58(f)/42(r), CR: 64(f)/36(r).

Forget all other test and numbers, these are enough to explain what we "feel" that the 911, particularly the GT3, is truly the better platform, long live rear-engine config
__________________
Fatih Selekler
997.2 GT3

Last edited by FTS; 06-25-2011 at 10:19 AM.
Reply With Quote
Reply


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

Forum Jump


All times are GMT -5. The time now is 12:32 PM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Garage vBulletin Plugins by Drive Thru Online, Inc.
©2010-2018, Porsche Club of America. This site is owned & operated by the Porsche Club of America, and is not affiliated in any way with Porsche AG or Porsche Cars North America.