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Snap Oversteer
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<blockquote data-quote="cempaka" data-source="post: 302412" data-attributes="member: 7014"><p>Actually Astroboy, the mistake you made there was to take your foot off the accelerator. Like Bundy said, oversteer is the rear wheels losing traction. When you lift accelerator or brake, the weight shifts to the front wheels (opposite effect of when you hit the gas) which reduces traction of the rear wheels (less weight pushing down on them). In a corner, this by itself can induce oversteer if going fast enough. </p><p></p><p>In this case, when your counter steer took effect, the rear tires weren't able to regain grip because they didnt have any weight on them, and continued to slide to the opposite side. With continued zero throttle, the MPV weight stayed all towards the front, so each time you countered, same thing happened, until you were finally going slow enough that the tires could grip. </p><p></p><p>A little bit of steady throttle would have shifted the weight towards the back and likely let your rear tires regain traction and taken you through the turn after your first counter. Of course, in the rain and with an MPV, the margins of error are much less, but it is the same principles, just with increased effect.</p><p></p><p>It is natural instinct for most people to lift throttle or even brake when they feel the rear end start to step out while cornering, but this actually makes the problem even worse, and is what causes "snap oversteer" aka "throttle-off oversteer" aka "lift-off oversteer" as at higher speeds it is very sudden and usually leads to a spin. So one of the key ways to control oversteer is not only counter steer, but also fighting one's instincts and learning to keep applying some throttle to increase the rear wheel traction. This of course takes lots of practice. </p><p></p><p>Most trained drivers can control normal oversteer at reasonable speeds. However, once snap oversteer begins at high speed, even professional drivers often cannot regain control, it's just too fast and too drastic, and you can see it happen occasionally at all levels of racing up to F1. The reason it doesnt happen more often is they take care to avoid it happening in the first place.</p><p></p><p>Definitely don't stiffen the rear more, as it actually makes the car more prone to oversteer. In fact, if the MPV is driven by other family members, I would recommend either returning the suspension to stock, or better yet sending them for a driver training course.</p></blockquote><p></p>
[QUOTE="cempaka, post: 302412, member: 7014"] Actually Astroboy, the mistake you made there was to take your foot off the accelerator. Like Bundy said, oversteer is the rear wheels losing traction. When you lift accelerator or brake, the weight shifts to the front wheels (opposite effect of when you hit the gas) which reduces traction of the rear wheels (less weight pushing down on them). In a corner, this by itself can induce oversteer if going fast enough. In this case, when your counter steer took effect, the rear tires weren't able to regain grip because they didnt have any weight on them, and continued to slide to the opposite side. With continued zero throttle, the MPV weight stayed all towards the front, so each time you countered, same thing happened, until you were finally going slow enough that the tires could grip. A little bit of steady throttle would have shifted the weight towards the back and likely let your rear tires regain traction and taken you through the turn after your first counter. Of course, in the rain and with an MPV, the margins of error are much less, but it is the same principles, just with increased effect. It is natural instinct for most people to lift throttle or even brake when they feel the rear end start to step out while cornering, but this actually makes the problem even worse, and is what causes "snap oversteer" aka "throttle-off oversteer" aka "lift-off oversteer" as at higher speeds it is very sudden and usually leads to a spin. So one of the key ways to control oversteer is not only counter steer, but also fighting one's instincts and learning to keep applying some throttle to increase the rear wheel traction. This of course takes lots of practice. Most trained drivers can control normal oversteer at reasonable speeds. However, once snap oversteer begins at high speed, even professional drivers often cannot regain control, it's just too fast and too drastic, and you can see it happen occasionally at all levels of racing up to F1. The reason it doesnt happen more often is they take care to avoid it happening in the first place. Definitely don't stiffen the rear more, as it actually makes the car more prone to oversteer. In fact, if the MPV is driven by other family members, I would recommend either returning the suspension to stock, or better yet sending them for a driver training course. [/QUOTE]
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