Gt3 owners with gt2 rear sway bar
08-24-2012, 11:12 AM
#183
Race Director
08-24-2012, 11:59 AM
#184
Rennlist Member
09-01-2012, 08:51 PM
#185
Racer
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The GT2 bar will certainly help (you have to try it to fix the issue)- I have no idea if it will be too much as I have no idea about the front bar on that car versus the stock gt3 front bar - most likely want to use the gt3 front bar as well but may as well try it.
What is your rear camber?
- given your front is 'only' -1, I would get your rear close to the front unless you can increase the front - no point having the rear more glued with higher rear camber if the front can't turn
Lower your front psi to 31 hot - it will help the front grip more - I've run the front PSS tires on the track at 31 hot - they are fine.
Finally, if you drive on the track, you need more than -1 front camber - get a set of RSS Lower Control arms (they come with shims) and get your front camber to around -2.3 (this will work for a combo street / track setup)
Your car will be transformed once you can get it to turn properly.
RSS LCA from Sharkwerks
http://www.sharkwerks.com/products.php?pid=322
What is your rear camber?
- given your front is 'only' -1, I would get your rear close to the front unless you can increase the front - no point having the rear more glued with higher rear camber if the front can't turn
Lower your front psi to 31 hot - it will help the front grip more - I've run the front PSS tires on the track at 31 hot - they are fine.
Finally, if you drive on the track, you need more than -1 front camber - get a set of RSS Lower Control arms (they come with shims) and get your front camber to around -2.3 (this will work for a combo street / track setup)
Your car will be transformed once you can get it to turn properly.
RSS LCA from Sharkwerks
http://www.sharkwerks.com/products.php?pid=322
An update, I went with 2010 997.2 GT3 front and rear bars. GT3 front lower arms with shims to get more front camber. We went with following setup:-
Front bar set one from softest.
Rear bar set too softest
Front 7mm spacers
Rear 5mm spacers
9mm of shims used on each lower control arm widening front track a further 18mm
Front camber -1.8degrees
Front castor +8.30
Front toe 0.00 (neutral)
Rear camber -1.75degrees
Rear toe +0.25 total
Car handles much more neutral, grips better and is a sheer joy and it slides very progressively, all round a great improvement.
Tyres wise I am running MPSS in 235/35/19 front and 295/30/19 rear, car is a 997.1 C2S on Sport Design wheels which I believe are 8" wide front and 11" wide rear?
Would it be ok to run Michelin CUPS in 245/35/19 front and 305/30/19 rear along with increasing front camber to approx -2.1degrees?
What are your thoughts?
Last edited by Gibbo; 09-02-2012 at 01:32 PM.
09-01-2012, 11:51 PM
#186
Race Director
Michelin Cups in N-Spec suck...go with 245/305 Pirelli Trofeo but yes you most likely will need more front camber...around -2.5 and rare around -2 all dependent of course on your track and driving also usually the front bar is softer than the rear.
Hi there
An update, I went with 2010 997.2 GT3 front and rear bars. GT3 front lower arms with shims to get more front camber. We went with following setup:-
Front bar set one from softest.
Rear bar set too softest
Front 7mm spacers
Rear 5mm spacers
9mm of shims used on each lower control arm widening front track a further 18mm
Front camber -1.8degrees
Front castor +8.30
Front toe 0.00 (neutral)
Rear camber -1.75degrees
Rear toe +0.20
Car handles much more neutral, grips better and is a sheer joy and it slides very progressively, all round a great improvement.
Tyres wise I am running MPSS in 235/35/19 front and 295/30/19 rear, car is a 997.1 C2S on Sport Design wheels which I believe are 8" wide front and 11" wide rear?
Would it be ok to run Michelin CUPS in 245/35/19 front and 305/30/19 rear along with increasing front camber to approx -2.1degrees?
What are your thoughts?
An update, I went with 2010 997.2 GT3 front and rear bars. GT3 front lower arms with shims to get more front camber. We went with following setup:-
Front bar set one from softest.
Rear bar set too softest
Front 7mm spacers
Rear 5mm spacers
9mm of shims used on each lower control arm widening front track a further 18mm
Front camber -1.8degrees
Front castor +8.30
Front toe 0.00 (neutral)
Rear camber -1.75degrees
Rear toe +0.20
Car handles much more neutral, grips better and is a sheer joy and it slides very progressively, all round a great improvement.
Tyres wise I am running MPSS in 235/35/19 front and 295/30/19 rear, car is a 997.1 C2S on Sport Design wheels which I believe are 8" wide front and 11" wide rear?
Would it be ok to run Michelin CUPS in 245/35/19 front and 305/30/19 rear along with increasing front camber to approx -2.1degrees?
What are your thoughts?
09-03-2012, 08:27 PM
#187
Race Car
Just spent the weekend at Road America with the GT2 rear bar installed. Running in the middle position pretty much eliminated the frustrating understeer which I had last time. Much more fun and enjoyable now.
