Jake951

Just ordered my bar from Suncoast. Thanks to deputydog for arranging the special deal. Ryan at Suncoast told me there aren't many bars left in inventory anywhere in the states, so get yours now.

deputydog95

Stock ride height.
Stock rake.
Stock wing.
PSS temps: 38f/40r hot

You're very welcome. Enjoy!

obsessedone

I had the same issues when I had my GT2 bar installed on full soft 2 years ago. The car was a real handful. When I got under the car and looked at the bar and links it was clear the shop had gotten distracted or something and set the bar full stiff, not full soft. Full soft is achieved when links are attached to end of lever arms as away from the side to side shaft of the bar as possible. Take a look and double check the setting, you may find you have the same problem I had.

With GT2 rear bar on full soft and front bar 1 from full stiff my car handles very neutrally with Hoosiers, Hoosier Wets or Sport Cups.

997gt3north

This may or may not help - but I generally do not like the feel of the tires as they get to 40psi as they get too slippery in feel for my liking - especially as it is very easy when you are targeting 40 hot to actually very quickly if the car is sliding to get up to 45 very quickly - and that is not the type of car I like to drive.

I learned this lesson early on. In my previous car on MPSC tires I was told 40 hot front and rear was what to aim for - but on the gt3 40 in the rear absolutely didn't do it for me. I felt I was constantly fighting with the car's setup as it was too knife-edge. I then started targeting rear 38 hot and then lower again and I'm now down to 35-36 with 32-33 front - this works so much better for me and I use it for both the PSS and the R6s.

Now, this is obviously very track dependent and speed dependent, but I think your front and rear camber setup is way too high especially if you are going to use PSS tires. At one point when I was trying to dial out the under steer I ended up at -2.7f and -2.4r the front was needed to get the car to turn. But, as soon as the gt2 bar was on the car, I slowly reduced the camber front and rear for much better tire wear and I find it also works with Hoosier R6s for my driving style, my local tracks + some daily driving / driving to the track.

So, my personal recommendation would be to try:
- lower hot temps (32-33, 35-36)
- back down the camber setup to get better tire wear
- you now don't need as much 'help' in the front if the rear will actually rotate more
- if the above doesn't help, then consider slightly lowering the rear of the car lets say 5mm to get more weight over the rear tires

BBMGT3

I find it very unusual those who are running stiffer bars at the front.

997gt3north

I was also going to suggest looking to see if it was on full stiff - as the original description of the crazy rotation sounded like it was. Something just seems not to add up if the tires are ok, the alignment is ok, tire pressures are ok, no crazy rake, etc. I know of a few gt3s running the gt2 bar on soft (and now you as well) and basically none of them act this way. To me the GT2 bar on soft just made the rear of the car move in tandem with the front of the car so the constant push is gone and the car just 'rotates' and moves how you want and need it to do on the track.

Mvez

Alignment seems way too aggressive for those street tires, I'd get the alignment fixed, then test.

Your 50/80 locks aggrressively, so couple that with more rear bar, and too aggressive of alignment, and I can see how you get snap oversteer. The rear tires don't have the grip to cope.

deputydog95

Alignment stays as I don't really drive the car much on the street. It's really setup for hoosiers. So maybe the bar is fine and its just that my setup is way too aggressive for street tires.

I'm switching to nt01's after my last set of hoosiers are done so I'll soften the alignment at that point.

I am going to check the setting to be on the safe side though as that would be a quick fix.

Mvez

Assuming the bar is correct, I'm willing to bet that's the main issue. Don't go too conservative for NT01's, they actually like camber, as they have a softer sidewall than RA1's, which is partly why they grip better. Perhaps try something like -3F, -2.25R.....and adjust from there for balance and tire wear.

deputydog95

Checked the bar. Its set correctly. My setup is probably just way too much for street tires. Had the hoosiers in the trailer. Having a lazy day and didn't feel like switching them

85Gold

Dawg

PSS don't like being any higher than 38 psi hot.

Peter

Larry Cable

dont forget (if you are doing a DIY install) to properly lube the rubber bushings...

joyride5

Bar helpful for 997.2 GT3's also? Or is it just for 997.1 GT3?

Larry Cable

.2 bars were modified based upon the experience of the chassis engineers who developed the GT2 ...

997gt3north

- i'm sure you meant to type GT2 not 2RS
- bars on the .2s are fine