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After conversing in another thread about tire choice it was clear that the 9-3, at least the Viggen, really needed some sorting when it came to traction. Nevermind the rampant torque steer, I can handle that. The handling isn't horrible either, it goes around corners plenty quick, but upon exit it has no traction.
Of course for cornering a limited slip and VRK will solve a lot, but what about straight line traction?
In a straight line, despite 215 tires, and limited boost (12 psi instead of 15) the Viggen can still sometimes lose traction. First gear only allows about 5-6 psi and is still rediculously traction limited. What's the deal??
When comparing to the 9000 I think while both cars are reasonably heavy, the Viggen has less weight in the front. I'm not sure if the 9K's weight distribution, but the 9-3 is around 60-40. My C900 was 70-30, and had far better wet and dry traction.
So if part of it is weight disribution then I'll just have to live with that as little can be done without extensive modification. However I'd like to hear what others have done and get some concrete data on it.
Here's what I have in mind:
Have everyone who can figure out how much g-force their car can accellerate with in gear.
List the gear, and the peak IN GEAR accelleration. (Sometimes additional accelleration may occur between shifts.) And let us know what kind of setup you were using to get that power to the wheels.
If you have your car's weight distribution, or other pertinent data that may be unique to your model list that as well.
If anyone has any existing data in other posts, feel free to add that here. I know Mark E's "Bubbles" has gotten something like .59 g's in 2nd gear. So he could list that as well.
My car:
2002 Viggen, stock with Kumho Excta MX's.
215/45 R17's Y rated
Peak accelleration:
1st: .52 g's (5 psi)
2nd: .42 g's (12 psi)
3rd: .31 g's (15 psi)
Next car?
Dubbya~
Of course for cornering a limited slip and VRK will solve a lot, but what about straight line traction?
In a straight line, despite 215 tires, and limited boost (12 psi instead of 15) the Viggen can still sometimes lose traction. First gear only allows about 5-6 psi and is still rediculously traction limited. What's the deal??
When comparing to the 9000 I think while both cars are reasonably heavy, the Viggen has less weight in the front. I'm not sure if the 9K's weight distribution, but the 9-3 is around 60-40. My C900 was 70-30, and had far better wet and dry traction.
So if part of it is weight disribution then I'll just have to live with that as little can be done without extensive modification. However I'd like to hear what others have done and get some concrete data on it.
Here's what I have in mind:
Have everyone who can figure out how much g-force their car can accellerate with in gear.
List the gear, and the peak IN GEAR accelleration. (Sometimes additional accelleration may occur between shifts.) And let us know what kind of setup you were using to get that power to the wheels.
If you have your car's weight distribution, or other pertinent data that may be unique to your model list that as well.
If anyone has any existing data in other posts, feel free to add that here. I know Mark E's "Bubbles" has gotten something like .59 g's in 2nd gear. So he could list that as well.
My car:
2002 Viggen, stock with Kumho Excta MX's.
215/45 R17's Y rated
Peak accelleration:
1st: .52 g's (5 psi)
2nd: .42 g's (12 psi)
3rd: .31 g's (15 psi)
Next car?
Dubbya~