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Old 11-29-2005, 10:50 PM   #1 (permalink)
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E30 M3 crazy autox

http://www.rennslalomcup.de/store/videos/000142.wmv

I love E30 M3's. Hope you guys enjoy this clip
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Old 11-29-2005, 11:23 PM   #2 (permalink)
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Wow, really nicely done. I like the guys driving skills.
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Old 11-30-2005, 11:30 AM   #3 (permalink)
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wow, with how tucked his tires were inside of his fenders (assuming it's heavily modded at least suspension) he's got some serious body roll problems, looks like his front inside wheel was wanting to come up off the ground whilst turning... Good driver though.
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Old 11-30-2005, 11:32 AM   #4 (permalink)
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My God. The suspension is so stiff it hops and lifts wheels everywhere. And the engine sounds like it's sucking infants through the air box.
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Old 11-30-2005, 11:34 AM   #5 (permalink)
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wow, with how tucked his tires were inside of his fenders (assuming it's heavily modded at least suspension) he's got some serious body roll problems, looks like his front inside wheel was wanting to come up off the ground whilst turning... Good driver though.
What? Do you understand the definition of body roll? Body roll is when wheels remain firmly planted on the ground and the chasis leans ... what he had was an extremely stiff suspension setup with virtually no travel which caused the kicking up of the wheels.
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Old 11-30-2005, 12:59 PM   #6 (permalink)
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Holy hell...

And that is very very small body roll.... thats call pulling Gs....

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Old 12-01-2005, 02:44 PM   #7 (permalink)
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mm.. that would be a body roll problem now wouln't it? If he had a little bit more body roll (ie, a slightly less stiff suspension) all four of his wheels would stay in contact. This goes to show that you can go too stiff. Perhaps I phrased my response improperly, but it is a body roll problem. Or is it faster to have a wheel off the ground?
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Old 12-04-2005, 08:51 AM   #8 (permalink)
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How WOULDNT it be faster to go around a corner with one wheel off the ground? As long as both drive wheels are firmly planted and the remaining front wheel retains enough grip.
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Old 12-04-2005, 12:17 PM   #9 (permalink)
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How WOULDNT it be faster to go around a corner with one wheel off the ground? As long as both drive wheels are firmly planted and the remaining front wheel retains enough grip.
I sort of agree with both of you. I definitely see where you're both coming from.

It would be just as fast if that one wheel can retain enough grip, but chances of it not retaining the same amount of grip are immense. That's why we have 4 wheels and not 3, right?
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Old 12-04-2005, 05:44 PM   #10 (permalink)
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I bet he pulled close to 1.5 G's on that run.....possibly more, but at least 1.5.
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Old 12-04-2005, 05:50 PM   #11 (permalink)
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Looked like a fun ride! The guy is good at using the throttle to steer.
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Old 12-04-2005, 10:59 PM   #12 (permalink)
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I am thinking that he is losing some of his grip for turning (not sure what it would be called technically). But it seems to me that with one of the front wheels off of the ground he would get understeer or some at least some change in handling. I know that if you make a cars suspension too tight then your lap time will actually go down. I don't know if that applies to his car, but I've seen it happen in porsh audi etc open top race cars, where one's suspension is too stiff for a course and they clearly suffer for it. However, all four of the wheels were still firmly planted (and it is the case on all road race cars that all four wheels stay planted) thereby making me think that having one wheel come up off the ground is not faster or as fast, or you would see from the professionals on the track.
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Old 12-05-2005, 09:40 AM   #13 (permalink)
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ahem, you DO see many race cars get a wheel or two off of the ground. Basically it means you are getting some super ass grip. You don't want it to come of a lot, but a little bit is good. Why do you all think his suspension is too stiff? His car was only a few inches off the ground. With any suspension setup that was more loose, he would have had excessive body roll and bottoming out issues. You can tell if a suspension is too stiff because it will either slide all four wheels without any lift, or it will lift on side/tire too high. That guy's wheels were barely coming off the ground, and so I would argue that he has an ideal setup for an autox and the car is working almost to it's potential limit. If you've been to an autox, you can tell that that guys car was really quick. I'd love to see an ordinary/ semi-modified car even try to beat that guys time. good luck with that.
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Old 12-05-2005, 08:46 PM   #14 (permalink)
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I know he's going fast, but what makes up for the lost grip of the front tire? Does he get all of that grip from one tire? It seems he would have to begin to understeer once the front tire come up off of the ground unless something was making up for that grip. I just watched the vid again, all four wheels are sliding in the begining and lifting the wheel a good bit in the air. During the second half of the vid he seems have it more under countrol, but at first he is really jerky, sliding and wheel hopping a lot. Perhaps he was being too jerky with the steering wheel in the begining or his tires had to heat up, but the first part of the video had something funny going on.

As for it being normal, can you find some vids of it? Of Professional drivers, GT, F1 etc where the do that?

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Old 12-06-2005, 01:32 AM   #15 (permalink)
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3 wheel vs. 4 wheel depends on his camber.
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