S197 Eibach Swaybar Advice?
6th Gear Member
Joined: Feb 2007
Posts: 7,635
From: state of confusion
Most cars get "tighter" as tire grip is increased and "looser" as tires age. So I'm not surprised by what you've experienced. The flip side would have been if the car was balanced for the slow stuff with the Hoosiers, it would have felt decidedly "loose" on the street tires.
305 tires on 9.5" wheels does not sound like a match made in heaven, however, and I suspect that that is hurting your front grip more than it is your rear grip. More roll stiffness (with roll stiffness rebalancing to suit) may help, though I think that's still a band-aid until the tire:wheel width issue is fixed.
Norm
305 tires on 9.5" wheels does not sound like a match made in heaven, however, and I suspect that that is hurting your front grip more than it is your rear grip. More roll stiffness (with roll stiffness rebalancing to suit) may help, though I think that's still a band-aid until the tire:wheel width issue is fixed.
Norm
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-Edward
http://www.hart-photography.com/phot...ewImage=662372
P.S.: How do you like the Ultralites? I'm considering these and the Pentars so that I can clear big brakes.
Last edited by EdwardGT; Apr 27, 2009 at 01:43 PM.
4th Gear Member
Joined: Dec 2007
Posts: 1,692
From: Ontario, Canada
Yes, the car is lowered. I'm running the Vogtland GT500 springs. BTW, here's a pic from a week ago.
-Edward
http://www.hart-photography.com/phot...ewImage=662372
P.S.: How do you like the Ultralites? I'm considering these and the Pentars so that I can clear big brakes.
-Edward
http://www.hart-photography.com/phot...ewImage=662372
P.S.: How do you like the Ultralites? I'm considering these and the Pentars so that I can clear big brakes.
Is your car running a SC or turbo?
What aspect ratio are your 305s? I'm running 285/40s to keep the stock rolling diameter.
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Joined: Jun 2008
Posts: 114
I bought the Ultralites because they would clear my GT500 brake upgrade. Your existing GT500 wheels should also clear them. If you are thinking about a BBK have you checked out the recent threads on the subject?
Is your car running a SC or turbo?
What aspect ratio are your 305s? I'm running 285/40s to keep the stock rolling diameter.
Is your car running a SC or turbo?
What aspect ratio are your 305s? I'm running 285/40s to keep the stock rolling diameter.
No FI, although after tracking Lightnings and an STi, I'm definitely in withdrawl.
The tires are 305/30/18 Grand Am Cup tires that I had originally run on my Lightning on 18x9.5" rims as well.
-Edward
4th Gear Member
Joined: Dec 2007
Posts: 1,692
From: Ontario, Canada
While my track wheels will clear Brembos or StopTechs, my DD wheels will not. That's too bad because I really like the look of the polished Bullitts. I'm leaning towards StopTechs due the availablity of pad compounds.
No FI, although after tracking Lightnings and an STi, I'm definitely in withdrawl.
The tires are 305/30/18 Grand Am Cup tires that I had originally run on my Lightning on 18x9.5" rims as well.
-Edward
No FI, although after tracking Lightnings and an STi, I'm definitely in withdrawl.
The tires are 305/30/18 Grand Am Cup tires that I had originally run on my Lightning on 18x9.5" rims as well.
-Edward
There is also a good choice of pads for the GT500 Brembo brakes. Last year I ran Ferodo DS2500 on the fronts and Hawk HPS on the back. This year I am trying EBC Yellowstuff at both ends. I'll find out on Saturday if the switch was a good idea.
Last edited by Sleeper_08; Apr 27, 2009 at 06:02 PM.
2nd Gear Member
Joined: Feb 2007
Posts: 162
From: Texas
Camber was set by probing temps across the tires in hot pit. I had initially started @ 1.5; but there was a 10* temp gradient across the tire. Why would I want to stagger tires sizes on this thing? In most cases OEM's stagger tire sizes in performance cars to add understeer to keep their buyers from balling up their cars on the street. I don't think this applies for this car on the track.
I'm not sure you can, or want, to set up a Mustang so that you don't need to trail brake. It seems to me that it would be way too loose on track out.
I have no idea why you would want staggered sizes. "Point and shoot car sort of car?"
-Wayne
6th Gear Member
Joined: Feb 2007
Posts: 7,635
From: state of confusion
Probably as opposed to a "momentum car" that cannot afford to lose any more speed than absolutely necessary in the turns because of (typically) having insufficient power (or drive tire traction if FWD with an open diff) to cover for that.
Norm
Norm
Last edited by Norm Peterson; Apr 28, 2009 at 06:29 AM.
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Joined: Aug 2007
Posts: 245
From:
try less front camber. Also is 305 on the front? This is unrelated but there's no real reason to run a tire that big there and multiple problems stem from doing so . If you have the ability to go smaller in the front I would and then rebalanced the car so it steers neutrally, you'll be faster. The mustang needs a greater balance towards the rear tires in terms of rubber because it's a point and shoot sort of car and they are the hardest working part of the vehicle, by going so wide in the front you're compromising the easy of control of the car and adding weight friction and rotating mass. Contrary to popular belief, wider is not always better.
Your handling is more or less "What the ****" in that case and the best and primary way to solve it is to put a much stiffer sway bar up front and rebalanced the car front to rear . If you do this and see an improvement reduce your front camber and you should be even better off.
Your handling is more or less "What the ****" in that case and the best and primary way to solve it is to put a much stiffer sway bar up front and rebalanced the car front to rear . If you do this and see an improvement reduce your front camber and you should be even better off.
If it is reasonably neutral in highspeed turns, but understeers in low speed, I'd suggest adjusting the dampers, if you can. Slightly less in the front or slightly more in the rear.
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Joined: Feb 2007
Posts: 7,635
From: state of confusion
I think Legion was first specifying that a lot more roll stiffness be added, and properly distributed as well. In that case, a little less negative camber is probably justified because you won't be compensating for as much roll or camber loss with the static setting.
Norm
Norm
Thread Starter
1st Gear Member
Joined: Jun 2008
Posts: 114
Thanks for the input guys. I know that the tire/wheel combo is sub-optimal; but the tires were already available, i.e. free. I certainly don't plan to go as wide when I get my next set. I think Norm is probably right regarding the tires being the problem. I think that on the slower corners, the roll is more evident. On the high speed turns, the tire sets up pretty quickly.
Thanks again,
Edward
Thanks again,
Edward
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