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Tire Jumping..., front tires |
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Mar 6 2008, 03:35 PM
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Senior
  
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Location: Scarsdale, NY
Drives: 2006 Hyundai Azera Limited, Sonata LX 6

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QUOTE(icedesign @ Mar 6 2008, 04:20 PM) So just wondering..im sure its a dumb question but anyways..why the **** do the tires jump like crazy when i gun it and they spin? It pissing me off so bad..i go to like race someone and i get off the line then BUM BUM BUM BUM BUM..feels like my car is going to rip itself apart. Anyone know the reason behind this crap? [right][snapback]141507[/snapback][/right]
I can only say that the Sonata was not designed to be a "racer", but a family sedan. If you want to race it you may just have to make some modifications or else get yourself a sports sedan. :) Don
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Mar 6 2008, 03:53 PM
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Audio geek

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I notice this sometimes, the technical term is Wheel Hop. This is often caused by large, heavy wheels and tires combined with a too soft suspension.
Generally stiffer suspension is the real cure, although stiffening the engine mounts can help sometimes.
I haven't taken out any of the Sonata engine mounts, but most front wheel drive performance enthusiasts fill the hollow voids in their engine mounts with urethane, epoxy or silcone sealant. One of the better choices is the 3M sealant that is used to install windshields.
That should help, along with some Eibach springs. Lighter weight wheels and tires are another step that can definitely be taken, and if you are looking for performance...probably should be done. :)
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Mar 7 2008, 12:56 AM
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Audio geek

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Traction control/stability control isn't really much like posi. Posi was a mechanical means of controlling the wheel speed, and ensuring that both drive/rear wheels were turning at the same speed.
ECS as on our cars controls the wheel speed through brakes, and doesn't care how fast any particular wheel is turning, it is focused on keeping the car going where you have pointed it.
Saab said way back in the 80s that the most power that could reliably be transmitted through a front wheel drive was about 225 hp, and they are right, IMO.
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Mar 7 2008, 01:43 AM
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Location: edmonton, alberta, canada
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QUOTE(MiamiLX @ Mar 6 2008, 11:23 PM) That is not what Wiki says... "The predecessor of modern electronic traction control systems can be found in high-torque, high-power rear-wheel drive cars as a limited slip differential, known as Positraction. As this system worked mechanically to transfer power to the individual rear wheel slipping the least, it still allowed some wheel spin to occur".http://en.wikipedia.org/wiki/Traction_control[right][snapback]141644[/snapback][/right] it also says "This article does not cite any references or sources. (June 2007)" and "Critics have questioned Wikipedia's reliability and accuracy, citing its open nature.[9] The criticisms are centered on its susceptibility to vandalism, such as the insertion of profanities or random letters into articles, and the addition of spurious or unverified information;[10] uneven quality, systemic bias and inconsistencies;[11] and for favoring consensus over credentials in its editorial process.[12] Scholarly work suggests that vandalism is generally short-lived.[13][14]" a mechanical limited slip or posi-trac distributes power more evenly to both wheels so that you have better traction, it did not limit wheel spin at all, that was left to your right foot to control. traction control (tcs) works by using the brakes or controlling the throttle to limit power and/or wheel spin to a preset 'acceptable' level of wheel spin, it doesn't care which wheel spins or if only one wheel gets the power.
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Mar 7 2008, 01:48 AM
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VALUED MEMBER
    
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Yes, that is what our Moderator just said!. http://auto.howstuffworks.com/28000-tracti...l-explained.htmTraction control helps limit tire slip in acceleration on slippery surfaces. In the past, drivers had to feather the gas pedal to prevent the drive wheels from spinning wildly on slippery pavement. Many of today's vehicles employ electronic controls to limit power delivery for the driver, eliminating wheel slip and helping the driver accelerate under control.
Traction control systems limit power to the drive wheels to prevent wheel spin under acceleration. Early Traction Control Powerful rear-drive cars from the sixties often had a primitive form of traction control called a limited slip rear differential. Sometimes referred to as Positraction, a limited-slip rear axle will mechanically transfer power to the rear wheel with the most traction, helping to reduce, but not eliminate wheel spin. While limited-slip rear axles are still in use in many front- and rear-drive vehicles today, the device can't completely eliminate wheel slip. Hence, a more sophisticated system was needed.
Electronic Traction Control Enter electronic traction control. In modern vehicles, traction-control systems utilize the same wheel-speed sensors employed by the antilock braking system. These sensors measure differences in rotational speed to determine if the wheels that are receiving power have lost traction. When the traction-control system determines that one wheel is spinning more quickly than the others, it automatically "pumps" the brake to that wheel to reduce its speed and lessen wheel slip. In most cases, individual wheel braking is enough to control wheel slip. However, some traction-control systems also reduce engine power to the slipping wheels. On a few of these vehicles, drivers may sense pulsations of the gas pedal when the system is reducing engine power much like a brake pedal pulsates when the antilock braking system is working.
This post has been edited by MiamiLX: Mar 7 2008, 02:15 AM
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Mar 7 2008, 03:40 AM
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Audio geek
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