997 GT3 315's?
02-11-2007, 09:53 PM
#3
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Originally Posted by Trj
Is there twitchiness?
02-11-2007, 10:27 PM
#4
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Reports about twitchiness from early owners and from the Excellence article. Also reports of the cars coming from the factory with rear sway full stiff. I wonder if track alignment (more camber especially up front) and loosening the rear bar a notch would help?
02-11-2007, 10:38 PM
#5
The rear sway is now three positions, not four.
Twitchiness is somehow coming to be interpreted as a lot more than anything I've experience in the car. The 996 has some twitch and "shimmy" (side to side play in the collective effective of all the rear bushings) and the 997 has a little less. Once you're on slicks on the track, I think it will be important to upgrade some of the control arms to tie rods and heim joints.
As for 315's, the car really needs more in the front, say 265's?
What tire and size do you have in mind?
Twitchiness is somehow coming to be interpreted as a lot more than anything I've experience in the car. The 996 has some twitch and "shimmy" (side to side play in the collective effective of all the rear bushings) and the 997 has a little less. Once you're on slicks on the track, I think it will be important to upgrade some of the control arms to tie rods and heim joints.
As for 315's, the car really needs more in the front, say 265's?
What tire and size do you have in mind?
02-11-2007, 11:06 PM
#6
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Originally Posted by Carrera GT
The rear sway is now three positions, not four.
Twitchiness is somehow coming to be interpreted as a lot more than anything I've experience in the car. The 996 has some twitch and "shimmy" (side to side play in the collective effective of all the rear bushings) and the 997 has a little less. Once you're on slicks on the track, I think it will be important to upgrade some of the control arms to tie rods and heim joints.
As for 315's, the car really needs more in the front, say 265's?
What tire and size do you have in mind?
Twitchiness is somehow coming to be interpreted as a lot more than anything I've experience in the car. The 996 has some twitch and "shimmy" (side to side play in the collective effective of all the rear bushings) and the 997 has a little less. Once you're on slicks on the track, I think it will be important to upgrade some of the control arms to tie rods and heim joints.
As for 315's, the car really needs more in the front, say 265's?
What tire and size do you have in mind?
If you look at a Ca. map I live right at the Mendocino/Sonoma county line on Hwy-1. Most of my driving is 2nd & 3rd gear. I also drive an 05 997S. The S seems to be way more predictable the the 3. The 3 is, what can say, twitchy. The TC kicks in at times when I don't think it needs to and jerks the car around. As I stated earlier, I will be taking it in for an alignment sometime week after next and see what the boys at TRG suggest. Also, it will be interesting to see how the car came set-up from the factory.
I plan on replacing the tires with the same Pilot sport cups which came with the car.
PS You got'a love these cars, even with the sunroof!!!!!
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02-11-2007, 11:27 PM
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Jeff,
I read in a post of yours, perhaps on Rennteam, that you were aware of a race shop that was test fitting Cup wheels on a street GT3 with PCCBs. Do you know the outcome of this experiment? My car has steel brakes and am guessing that they would fit perfectly. Do you know which wheels the 997 Cup car uses? If I could impose a bit more, do you know the width and offset of the 997 Cup wheels?
Thanks in advance,
Hank
I read in a post of yours, perhaps on Rennteam, that you were aware of a race shop that was test fitting Cup wheels on a street GT3 with PCCBs. Do you know the outcome of this experiment? My car has steel brakes and am guessing that they would fit perfectly. Do you know which wheels the 997 Cup car uses? If I could impose a bit more, do you know the width and offset of the 997 Cup wheels?
Thanks in advance,
Hank
02-11-2007, 11:43 PM
#10
Originally Posted by Snowboarder54
Interesting. I don't seem to have a problem turning in to the corners at all. (larger tires in front?)
If you look at a Ca. map I live right at the Mendocino/Sonoma county line on Hwy-1. Most of my driving is 2nd & 3rd gear. I also drive an 05 997S. The S seems to be way more predictable the the 3. The 3 is, what can say, twitchy. The TC kicks in at times when I don't think it needs to and jerks the car around. As I stated earlier, I will be taking it in for an alignment sometime week after next and see what the boys at TRG suggest. Also, it will be interesting to see how the car came set-up from the factory.
I plan on replacing the tires with the same Pilot sport cups which came with the car.
PS You got'a love these cars, even with the sunroof!!!!!
If you look at a Ca. map I live right at the Mendocino/Sonoma county line on Hwy-1. Most of my driving is 2nd & 3rd gear. I also drive an 05 997S. The S seems to be way more predictable the the 3. The 3 is, what can say, twitchy. The TC kicks in at times when I don't think it needs to and jerks the car around. As I stated earlier, I will be taking it in for an alignment sometime week after next and see what the boys at TRG suggest. Also, it will be interesting to see how the car came set-up from the factory.
I plan on replacing the tires with the same Pilot sport cups which came with the car.
PS You got'a love these cars, even with the sunroof!!!!!
Soon enough you'll have the GT3 dialed in and the S will be a distant memory.
Let's talk about what TRG recommends.
I'd be reasonably confident you can get the GT3 alignment dialed in at Sonnen. A combination of removing some bushings and dialing in roll stiffness will remove any thought of "twitchiness" but on the street, there's really no opportunity to access the potential of the car.
For the street, as long as you're comfortable with $1500 lasting 3K miles, that's fine, but there is a wide selection of much better tyres out there. At the very least, I'd try the other factory fitment tyre (the Corsa) and you'll notice both more stick and better control in the wet.
In my experience, these bigger, heavier, more powerful 911's can work a lot wider tire on the front once the suspension and tires are working well together, more stick on the front opens up the potential to send more and more power to the ground without feeling like you're driving a 935.
Have you been seeing the yellow TC indicator light flashing?
02-11-2007, 11:45 PM
#11
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997 GT3 Cup wheels will rub on a standard 997 GT3 street car. The offset is even more aggressive than the RS wheels, the fenders on the Cup are deeply rolled, and the tires are skinny 270 slicks. The wider 305 will rub, guaranteed.
997 GT3 Cup:
Front: 18" x 9" ET 43
Rear: 18" x 11" ET 30
However, rolling the rear fenders and removing the 5mm spacer, could make it work with the 305 tire. But why do that, when you can run 335 or 345 tires with the right offset wheels?
997 GT3 Cup:
Front: 18" x 9" ET 43
Rear: 18" x 11" ET 30
However, rolling the rear fenders and removing the 5mm spacer, could make it work with the 305 tire. But why do that, when you can run 335 or 345 tires with the right offset wheels?
02-11-2007, 11:51 PM
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Originally Posted by Hank Cohn
Jeff,
I read in a post of yours, perhaps on Rennteam, that you were aware of a race shop that was test fitting Cup wheels on a street GT3 with PCCBs. Do you know the outcome of this experiment? My car has steel brakes and am guessing that they would fit perfectly. Do you know which wheels the 997 Cup car uses? If I could impose a bit more, do you know the width and offset of the 997 Cup wheels?
Thanks in advance,
Hank
I read in a post of yours, perhaps on Rennteam, that you were aware of a race shop that was test fitting Cup wheels on a street GT3 with PCCBs. Do you know the outcome of this experiment? My car has steel brakes and am guessing that they would fit perfectly. Do you know which wheels the 997 Cup car uses? If I could impose a bit more, do you know the width and offset of the 997 Cup wheels?
Thanks in advance,
Hank
I say 'knockoffs" b/c the real cup wheels are centerlocks. Fikses come recommended by Farnbacher and are the wheels I'll go with. If you go with BBS, make sure you get the uprated rim halves to withstand occasional street use if you plan on driving to the track.
Not sure on the offsets. I think you get various offsets and rim widths depending on how you get them built up.
02-11-2007, 11:57 PM
#13
That's interesting, I have some 18's from the 996, I'll go push those of the fronts and see if they're clear. That would be a nice solution at least for now.
Having watched a 360CS blow up a 19 on a berm at Laguna, I'm cautious about banging around in 19's on the equally heavy GT3.
Having watched a 360CS blow up a 19 on a berm at Laguna, I'm cautious about banging around in 19's on the equally heavy GT3.
02-12-2007, 12:23 AM
#14
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Thread Starter
Originally Posted by Carrera GT
I know the roads you mean and wish I was there more often. Let's have a 997 GT3 drive up there one weekend.
Soon enough you'll have the GT3 dialed in and the S will be a distant memory.
Let's talk about what TRG recommends.
I'd be reasonably confident you can get the GT3 alignment dialed in at Sonnen. A combination of removing some bushings and dialing in roll stiffness will remove any thought of "twitchiness" but on the street, there's really no opportunity to access the potential of the car.
For the street, as long as you're comfortable with $1500 lasting 3K miles, that's fine, but there is a wide selection of much better tyres out there. At the very least, I'd try the other factory fitment tyre (the Corsa) and you'll notice both more stick and better control in the wet.
In my experience, these bigger, heavier, more powerful 911's can work a lot wider tire on the front once the suspension and tires are working well together, more stick on the front opens up the potential to send more and more power to the ground without feeling like you're driving a 935.
Have you been seeing the yellow TC indicator light flashing?
Soon enough you'll have the GT3 dialed in and the S will be a distant memory.
Let's talk about what TRG recommends.
I'd be reasonably confident you can get the GT3 alignment dialed in at Sonnen. A combination of removing some bushings and dialing in roll stiffness will remove any thought of "twitchiness" but on the street, there's really no opportunity to access the potential of the car.
For the street, as long as you're comfortable with $1500 lasting 3K miles, that's fine, but there is a wide selection of much better tyres out there. At the very least, I'd try the other factory fitment tyre (the Corsa) and you'll notice both more stick and better control in the wet.
In my experience, these bigger, heavier, more powerful 911's can work a lot wider tire on the front once the suspension and tires are working well together, more stick on the front opens up the potential to send more and more power to the ground without feeling like you're driving a 935.
Have you been seeing the yellow TC indicator light flashing?
I had a set of the Corsa's on the S. I did not like them at all on these roads, switched back to the Michelin's. I did get about 5600 miles out of them but boy were they ever noisy! Neither one is real good in the rain.
Yes, the light flashes frequently on the 3 as it does on the S. If anyone wants to enjoy a some of the local roads drop me a PM and we can arrange a little tour.
Cheers
