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Gear ratios of 997 GT3

 
Old 09-28-2011, 01:10 PM
  #31  
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Originally Posted by bmardini View Post
Well, currently my 997.1 tops out in 2nd at about 75-80mph, 3rd is good for 110-115mph, 4th 135mph or so and so on. What sort of difference would a 4.0 make?
Take 3.44/4.0, which is 0.86, and then multiply by the max speed in each gear.
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Old 09-28-2011, 08:50 PM
  #32  
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Does anyone know how to find a 3.89 for my .2 GT3 ? 4.0 seems to much for highway cruising which i do regularly
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Old 09-28-2011, 09:07 PM
  #33  
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When I was regearing the 3.89 was not available unless you bought a complete gear box

That was a year ago so maybe that has changed

Last edited by P.J.S.; 09-28-2011 at 10:22 PM.
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Old 09-29-2011, 10:31 AM
  #34  
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A public Thank You to PJS. He has given me a lot of great information on this subject.
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Old 09-29-2011, 11:03 AM
  #35  
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Originally Posted by 996toomey View Post
A public Thank You to PJS. He has given me a lot of great information on this subject.
Same. PJ, you've been grand!
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Old 09-29-2011, 11:24 AM
  #36  
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Originally Posted by 996toomey View Post
A public Thank You to PJS. He has given me a lot of great information on this subject.
Originally Posted by bmardini View Post
Same. PJ, you've been grand!
My pleasure guys - as mentioned I have received a lot of help from rennlisters over the past few years and if I can "give back" I am happy to do so. :-)
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Old 09-30-2011, 07:37 AM
  #37  
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You need to call Matt over at Guard transmission. He will be working on a project car of mine from another forum.

The trans up grades are going in a 11' GT3 RS. Updates will include LSD and new 4-6th gear stack. Also may look at another clutch and flywheel.

Work will start at RSS in Costa Mesa, Ca. as soon as Interline Transport gets it there.

Again, call Matt at GT for more info and options on trans updates.

YM.02$

-Troy
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Old 09-30-2011, 04:16 PM
  #38  
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Anyone with 9:31 -- 3.444 stock Ring & Pinion to sell please contact me.I am looking for more than one.. Thx
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Old 06-04-2012, 05:56 PM
  #39  
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Originally Posted by PJS996GT3 View Post
When I was regearing the 3.89 was not available unless you bought a complete gear box

That was a year ago so maybe that has changed
BTW - Porsche now offers the factory 3.89. It can be purchased from Suncoast for $2695. Just bought it.

Part #: 997 302 911 90
Model: G97.92 I004

Wright Motorsports/Brian Copans will be handling my install
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Old 06-04-2012, 05:57 PM
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Originally Posted by Red9 View Post
Anyone with 9:31 -- 3.444 stock Ring & Pinion to sell please contact me.I am looking for more than one.. Thx
Mine will be available in ~1 month. Let me know if you are interested.
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Old 06-04-2012, 06:15 PM
  #41  
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Originally Posted by Red9 View Post
Anyone with 9:31 -- 3.444 stock Ring & Pinion to sell please contact me.I am looking for more than one.. Thx
damn -- I just sold two of them


Originally Posted by Mvez View Post
BTW - Porsche now offers the factory 3.89. It can be purchased from Suncoast for $2695. Just bought it.

Part #: 997 302 911 90
Model: G97.92 I004

Wright Motorsports/Brian Copans will be handling my install
you will LOVE it...
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Old 06-04-2012, 06:43 PM
  #42  
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Originally Posted by PJS996GT3 View Post
damn -- I just sold two of them




you will LOVE it...
What's a fair asking price for a low mileage 3.44 R&P set in the used market?
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Old 06-04-2012, 06:54 PM
  #43  
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PM coming your way
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Old 12-04-2018, 09:43 AM
  #44  
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Talking The 3.89 "Bug" has bitten

On my 2004 GT3, I am doing the AASCO LWF/clutch, etc. Also replacing the stock LSD with a 60/40 Guards unit. Now I am thinking, "while you are in there", change out the R&P to the 3.89 , and maybe add a taller 6th gear. There is no track I run where you get into 6th gear, and if there were, I wouldn't go there...too bloody fast for me. I do like to do a little Hwy cruising and 3,000 RPM seems to be the sweet spot for this engine...as it was for my former 993 with short gears. With that tranny, I wish I would have put in a taler 6th gear, or retained the stock 6th hear, R&P was stock on the 993.

So the 3.89 is on my 2019 wish list, probably with a taller 6th gear.
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Old 12-04-2018, 12:21 PM
  #45  
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I did what has been suggested in the preceding posts to my 2007 RS. I replaced the OEM 3.41 R&P with the 3.89 that comes in the 997.2 GT3/RS. I also changed out the 6th gearset to the taller 997.2 ratio. The acceleration - as well as the ability to leave a stop - is greatly improved, and freeway cruising rpm is perfect. While in there, I installed a 40/60 Guard LSD unit guts into the OEM casting, changed out the RMS (for a Turbo unit - yea!! no leaks anymore), and replaced the clutch components (LWFW was fine). All told, around $12-13K. Not cheap.

Last edited by HarmonyJim; 12-04-2018 at 03:49 PM.
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