996 Turbo / GT2 Turbo discussion on previous model 2000-2004 Porsche 911 Twin Turbo and 911 GT2.
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Old 10-22-2009, 11:43 PM #1  
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anti-roll sway bars...

Anyone know the diameters on the stock sway bars? Does the H&R anti-roll sway bars(front bar diameter 25mm and rear bar diameter 24mm) make much of a difference?
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Old 10-23-2009, 10:11 AM #2  
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Stiffer adjustable sways definitely make a positive difference. Sorry, I don't know the stock sizes off hand.
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Old 10-23-2009, 10:42 AM #3  
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Significant improvement in overall handling. Improves the balance of the car especially for DE days. I purchased the H&R sways and they are good
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Old 10-23-2009, 01:48 PM #4  
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GMG (sponsor) also has some adjustables that are significantly stiffer than stock.
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Old 10-23-2009, 07:26 PM #5  
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i hear people talk about coilovers and just changing the rear sway bar??
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Old 10-23-2009, 08:17 PM #6  
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The previous owner had that setup PSS9s and a rear sway and it was pretty good. Keep in mind if you put on the front one on later you will probably have to get the car aligned again.
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Old 10-23-2009, 08:22 PM #7  
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FYI- torsional rigidity is linearly proportional to the rotational moment of inertia which is a factor of diameter to the fourth power...

So the difference is 24^4 compared to 25^5 or about 18% stiffer

A
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Old 10-23-2009, 08:55 PM #8  
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Quote:
Originally Posted by c2scanada View Post
The previous owner had that setup PSS9s and a rear sway and it was pretty good. Keep in mind if you put on the front one on later you will probably have to get the car aligned again.
Sway bars have no effect on alignment.
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Old 10-24-2009, 08:18 AM #9  
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Ditto...

Also I believe H/R offer a 26MM front bar as well... Last thing this car needs is MORE stifness in the front!

I'm running H/Rs and they're fine, but you'll want to run the front in full soft = outter most hole. Don't forget upgraded drop links. Stockers are JUNK!

Mike

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Sway bars have no effect on alignment.
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Old 10-24-2009, 09:53 AM #10  
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Quote:
Originally Posted by c2scanada View Post
Significant improvement in overall handling. Improves the balance of the car especially for DE days. I purchased the H&R sways and they are good
I got mine from Sharkey at Sharkwerks and was very pleased,
as it makes car more responsive and have better turn-in.

Also get GMG or Tarrat Engineering drop links, not cheap but worth it!

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Old 10-24-2009, 10:28 AM #11  
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Quote:
Originally Posted by Mikelly View Post
Ditto...

Also I believe H/R offer a 26MM front bar as well... Last thing this car needs is MORE stifness in the front!

I'm running H/Rs and they're fine, but you'll want to run the front in full soft = outter most hole. Don't forget upgraded drop links. Stockers are JUNK!

Mike
if the front is so stiff, then do you really need an upgrade in the front?
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Old 10-24-2009, 11:09 AM #12  
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No front bar needed, Ruf and others only use the rear bar, it works. I've yet to see somebody actually adjust the front bar on a turbo, last thing this car needs is more front stiffness.
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Old 10-24-2009, 11:11 AM #13  
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Quote:
Originally Posted by TT Gasman View Post
No front bar needed, Ruf and others only use the rear bar, it works. I've yet to see somebody actually adjust the front bar on a turbo, last thing this car needs is more front stiffness.

thanks, seems like everyone is on the same page here.
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Old 10-24-2009, 11:29 AM #14  
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Quote:
Originally Posted by TT Gasman View Post
No front bar needed, Ruf and others only use the rear bar, it works. I've yet to see somebody actually adjust the front bar on a turbo, last thing this car needs is more front stiffness.
An adjustable front bar allows you to make the front softer than stock, so it is useful. Being able to adjust both ends allows you to fine tune the balance. I started with just a rear bar, and eventually added the front one for this purpose.

You really need to have more negative camber on these cars to make them handle correctly. For that you need the GT3 lower control arms, front and rear. (Or, GT3 arms up front and adjustable upper dog-bones on top in the rear, which is what I have.) With those, it does help to be able to adjust both ends.

My car is now very neutral, and I got 9 track days from a set of Michelin PSC's. They have another couple of days in them, but I ran out of time for the season. When I first got the car, 3 days and I was down to the cords on the shoulders front and rear. The car handles a lot better too.

Jon
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Old 10-24-2009, 11:44 AM #15  
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I'm pretty sure Sharkwerks recommended and installed both front and rear H&R sway bars along with my PSS10s...
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