996 Turbo / GT2 Turbo discussion on previous model 2000-2005 Porsche 911 Twin Turbo and 911 GT2.

Carbon Fiber Battery

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  #16  
Old 11-13-2007, 06:10 PM
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Tom K,

With all the weight you have taken off the front end of your car having a light battery, no spare or tools, no bumper support and maybe lighter wheels/brakes, to name a few, I would be curious to know your % weight distribution front to rear, if you happen to know.

I am currently at 38.1 and 61.9 and haven't taken out all the weight you have. I am still at 3410# sans driver with a little over a half-tank of fuel.

Did you notice any difference in handling at some point as the front got lighter and lighter? I would love to figure out how to get more weight off the rear end, but can't think of anything else to do that makes sense, either safety or dollar-wise.
 
  #17  
Old 11-13-2007, 10:03 PM
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Originally Posted by robertp
I just purchased the PC680T $125.000 with the mounting bracket. This Odyssey battery does not require a charger if you start the car at least once every two weeks. I spoke with Tony (951-736-3530) at West Coast battery. He is in Corona, Ca and kenw exactly which battery and mounting hardware I needed for my 996TTS. The battery specks are posted below.


PC 680T Specs:
  • 680 cranking amps for 5 seconds
  • 595 cranking amps for 10 seconds
  • 525 cranking amps for 20 seconds
  • Short circuit current over 1800A
  • 17 amp hours
  • 24 minute reserve capacity with 25amp load
  • With metal jacket
  • Length 7 1/16"
  • Width 3"
  • Height 7 5/16"
  • Weight 15 lbs
Odyssey design:
  • 2 year full warranty
  • Rugged Drycell sealed design
  • Military grade
  • Vibration resistant
  • 60% more starting power
  • Deep discharge reserve power
  • 2 year storage life
  • 8-12 year design life
  • Can be mounted flat or upright

Also available with a textured matte black finish
  • Lightweight aluminum weighs less than 1 pound
  • Can be mounted flat or upright
  • Great for buggys, cars, and small aircraft
  • Brushed finish suitable for painting
thats the right battery and holder. word of caution. that battery will not take sitting around and starting once every few weeks without a trickle charger believe me I know.
if you or anyone goes with this you must commit to a charger. IMHO at least.
 
  #18  
Old 11-13-2007, 10:07 PM
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Originally Posted by Al Norton
Tom K,

With all the weight you have taken off the front end of your car having a light battery, no spare or tools, no bumper support and maybe lighter wheels/brakes, to name a few, I would be curious to know your % weight distribution front to rear, if you happen to know.

I am currently at 38.1 and 61.9 and haven't taken out all the weight you have. I am still at 3410# sans driver with a little over a half-tank of fuel.

Did you notice any difference in handling at some point as the front got lighter and lighter? I would love to figure out how to get more weight off the rear end, but can't think of anything else to do that makes sense, either safety or dollar-wise.
I have had the car corner balanced I will go back and look. But remember how much I took off the rear as well, so maybe close to the same starting ratio. car handles great and I think its around 3150-3200 pounds.

remember no exhaust system, rear bumper, wiper, seats, subwoofer balances things in the front out some.
 
  #19  
Old 11-14-2007, 08:33 AM
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Been discussed everal times but my 2 cents again......the 928 is 10 pounds heavier than Tom's but still saves 25 lbs off OE & is fairly practical.......just the same, the car should not be left for a week with-out running and with-out a trickle (I'm up here in the great white North ).

 
  #20  
Old 11-14-2007, 11:42 AM
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Originally Posted by GreggT
Been discussed everal times but my 2 cents again......the 928 is 10 pounds heavier than Tom's but still saves 25 lbs off OE & is fairly practical.......just the same, the car should not be left for a week with-out running and with-out a trickle (I'm up here in the great white North ).

totally agree and Gregg is where I got all my battery info!!
 
  #21  
Old 11-14-2007, 02:16 PM
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The battery just arrived. Thanks Tom for the advice. I will install tomorrow.
 

Last edited by robertp; 12-19-2007 at 05:43 PM.
  #22  
Old 11-14-2007, 03:02 PM
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Originally Posted by GreggT
Been discussed everal times but my 2 cents again......the 928 is 10 pounds heavier than Tom's but still saves 25 lbs off OE & is fairly practical.......just the same, the car should not be left for a week with-out running and with-out a trickle (I'm up here in the great white North ).


there is no 928 listed on their site. are you talking about the 925?
 
  #23  
Old 11-14-2007, 05:10 PM
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Sorry.....thanks for catching typo.......925CA w/Terminals.......I think West Coast used to get around $40 for that side-mount hold down........but the batt was only $105 or whatever.
 
  #24  
Old 11-14-2007, 05:45 PM
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Originally Posted by GreggT
Sorry.....thanks for catching typo.......925CA w/Terminals.......I think West Coast used to get around $40 for that side-mount hold down........but the batt was only $105 or whatever.
thanks gregg. i am looking at Rennline.com and they only list two model numbers for the 925: a pc925mjt and pc925t.
http://www.rennline.com/prodinfo.asp?number=EL%2DPC925

which is the correct one?

thanks.
 
  #25  
Old 11-15-2007, 05:32 AM
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Originally Posted by drewTT
thanks gregg. i am looking at Rennline.com and they only list two model numbers for the 925: a pc925mjt and pc925t.
http://www.rennline.com/prodinfo.asp?number=EL%2DPC925

which is the correct one?

thanks.

Go to http://www.odysseybatteries.com/batteries.htm and check out the batteries. I have the PC680T and purchsed the Rennline battery holder http://www.rennline.com/prodinfo.asp?number=EL30%2E37

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  #26  
Old 08-29-2009, 01:02 PM
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Can one charge the TT via battery via the 12V cabin cigarette lighter socket or only directly to the battery ??
 
  #27  
Old 08-29-2009, 01:21 PM
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  #28  
Old 08-29-2009, 01:26 PM
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I also have the 925T. Works great. Rarely trickle charge if I wont start it for a week or more. Never let me down. Very practical for DD and cuts 25lbs off stock batt.
 
  #29  
Old 08-29-2009, 01:28 PM
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I think I am going to try the Braille B14115.
 
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