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Old 03-23-05, 01:56 PM   #1
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Curious if others get this too. If you are in the middle of a turn and get on the gas does your STI seriously push to the outside of the turn? Just curious. Mine has always done this. If I am in the middle of a turn and I get on it then I NEED to turn the steering wheel at the same time in order to maintain my current direction. If I don't turn the wheel when I push the accelerator down then the car will immediately push to the outside.

Just curious. Any explanations? The best I could come up with was that when you hit the accelerator you get 65% to the rear wheels which causes the push?

t

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Old 03-23-05, 02:27 PM   #2
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Default RE: Re: RE: Also blacked out 04 steering wheel

Pushing to the outside of a turn would be understeer, which would come from weight transfer/front heavy car/undersized sway bars/too much power to the front wheels or anything else that would reduce grip to the front two wheels.

The STi and most AWD vehicles (hell, just about all production cars) understeer. The good news is that you can correct it with some minor mods and an alignment.
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Old 03-23-05, 02:47 PM   #3
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If I get on the gas hard, no it doesn't do that. If you learn to be more aggressive with our throttle you will notice the car doesn't do it. I used to be the same way as you. Then one time I got pissed and just floored it. The car squated as the weight transferred to the rear and outside then just turned through the corner. If your light with your throttle input the car will understeer as described above. If your more agressive the weight transfer can actually benefit you.
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Old 03-23-05, 02:48 PM   #4
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Default Re: RE: Re: 2004 STi vs. 1986 Lincoln Mk. VII

The only way I have gotten around this is to take some of the power from the back and put it up front with the DCCD.

And if you do a search this has been covered in other parts of the forum. (Just to keep you from getting reminded).

But I to would like to know if anyone has a "great" solution to this problem. I have read everywhere from different sway bars to pinks and top hats to ajustable struts. I'm not that price sensitive, but damn some of these options can run into thousands of dollars.

Any help...
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Old 03-23-05, 03:22 PM   #5
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the technique WE R ND describes works better than any suspension change that I know of, the problem is that it is counter intuitive to most drivers (magazine writers especially). Also the 2005 front diff responds less dramatically than the 2004 to this aggressive input, so the reaction will not be as noticeable. The 2004 really tightens its line when you stomp the gas just before the apex. Coming from a 2002 WRX to a 2004 STi, I noticed that LESS steering input was required because the limited slip front diff was pulling the front of the car through the corner rather than being pushed and the rear wheels were inducing oversteer due to the active center diff doing its thing. I nearly clipped the curb just before the apex of quite a few turns until I got used to dialing in less lock and enjoying the amazing feeling you get from feeling the car work so well.

Suspension changes will make it less prone to understeering, but that is more costly than adapting to the excellent system that is just waiting for you to learn to use it to it's full potential.

Bottom line is to experiment with more aggressive pre-apex throttle application. the rally based heritage is designed for this style of driving and you will get the most out of the car if you treat it that way. It's also a LOT of fun to practice. just do it in a safe place, like a driving school or autoX.
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Old 03-23-05, 03:49 PM   #6
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As Xman said, I've noticed that being more aggressive with the throttle really gets you tucked in nicely and it just rockets out of a corner (makes getting on on-ramps very fun. )
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Old 03-23-05, 05:05 PM   #7
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Yep, with my '05, I can correct my turn-in angle very easily with the throttle. I am partial to coming in fast, and if I slightly overcook, a little throttle corrects my initial error nicely.
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Old 03-23-05, 06:25 PM   #8
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You need to be on the gas as soon as you turn in. Sounds like you are going in too fast and then when you get on the gas the car pushes. Try going in slower and getting on the gas when you turn in. You'll be able to exit MUCH faster and your steering input wont change half way through the turn.
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Old 03-23-05, 07:08 PM   #9
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Try installing a rear-end sway bar. I just installed it not too long ago and I wished I have done it long time ago.
It should take care of the annoying understeer problem.
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Old 03-23-05, 09:59 PM   #10
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I think what people are trying to describe is weight transfer and static/sliding friction...

WARNING--GEEK ALERT!!!--WARNING

There are two factors that determine whether the car understeers or oversteers. There is the weight transfer issue--if the car is under braking, the weight shifts away from the rear wheels and the car oversteers. If the car is accelerating, the weight shifts away from the front, and the car oversteers.

The problem is, the weight transfer also puts more frictional load on the respective tires, e.g. while in a braking turn, the front wheels have to do more of the work stopping the car, and if you ask too much of them, they lock up. Sliding friction is less than rolling friction, so all of a sudden, the FRONT wheels have less traction and you're back to understeer.

Likewise, if you stomp on the gas and you break away the rear wheels, the car will be begin to oversteer.

So in short:

Braking very hard (with tires skidding) - understeer
Braking hard - oversteer
Accelerating hard - understeer
Accelerating very hard (with tires skidding) - oversteer

GEEK ALERT OVER!
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