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Difference between Understeer and Push/Kick ?

 
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David Flori



Joined: 17 Apr 2012
Posts: 43

PostPosted: Sun Jun 30, 2013 4:33 pm    Post subject: Difference between Understeer and Push/Kick ? Reply with quote

Looking through my CRG Tuning manual, and couldn't help but notice there are subtle differences, as well as they felt the need to have a full heading for the term.

What is the difference between the two, however subtle?


And while I am here, can someone describe what hopping is, where it is likely to happen, and what I should be feeling or experiencing to know it is happening.

Is it drastic enough that you cant miss it, or is it more subtle?

Is there any good video showing handling conditions to better explain the terms?

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Ray Lovestead



Joined: 21 Dec 2011
Posts: 206
Location: United States, Colorado, Louisville

PostPosted: Mon Jul 01, 2013 5:22 am    Post subject: Reply with quote

David

Push (understeer) can be subtle to strong. You know it when you turn your steering wheel and continue to go straight (that would be extreme). More subtle is a slight scrubbing of speed from the front end as you turn into a turn.

Push/Kick (or snap oversteer) is when you enter a turn and have a quick/short period of understeer and then you finally develop the needed front end grip which causes the rear of the kart to suddenly snap around (oversteer). This one can be confusing to new drivers because it feels like oversteer, but it is actually understeer that is causing it.

Hopping is when you have too much rear grip. Your tires have so much rear grip that it doesn't allow the kart to unload (remember that you don't have a rear differential) and the kart has to 'hop' to unload the force on the tire due to your engine trying to turn it (inside tire).

You can simulate hopping to feel it by reducing your tire pressure to like 4 psi. You'll feel the chassis gripping and releasing, gripping and releasing (hopping).

I hope this is correct Confused. And hope this helps.

Ray
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