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Top Shelf
04-22-2005, 11:07 AM
Does any one know an equation for dampening. i.e. to see if its over, under or critically damped at low, med, hi shock piston speeds with the weight of the car also in the equation?? That could perhaps be applied to bound, and / or rebound.

The only way to get a real idea is to ride in the car. But I don't have money to throw around looking for the right set-up, so I was wondering if anyone had an equation. I know the spring values that I want, now I was looking for a function of dampening and weight.

After looking through a couple of shock dyno testing graphs (http://www.honda-tech.com/zerothread?id=1104049&page=1)
I'm thinking about h&r springs with kyb agx/ illumnas with top hats.

It looks like though from these graphs that tokiko illumna's would have more noticeable difference than the kyb agx's on the rebound side (above x axis); however the bound side (below x axis) the kyb's has a larger value. Would that translate in to a smoother ride for the kyb, but less adjustment?

I know koni's are better, but I don't have that kind of money to be spending on that type of a setup. And If I’m going to spend money, I would probally get the omni coilovers 8k/6k setup.

I was looking for a good street set-up and something that could be mildly competitive in auto cross, or road racing. I tried calling H&R but the phone number that i used (several) none of them could really answer my question on matching.

To sum it all up, does anyone know an equation, or can give me some factual evidence, resources.

I'm not looking for any anecdotal accounts.

Thank you very much.

bs motorsports 2
04-22-2005, 12:37 PM
damn nice question but unfortantly u made me feel stupid lol somebody help this guy out.

Qwazelbee
04-24-2005, 10:35 PM
If there is a drag force D=-bv, where b is the damping constant, then for lightly damped systems

http://img.photobucket.com/albums/v730/qwazelbee/damp.jpg

This is a function of dampening and weight.

Top Shelf
04-29-2005, 08:13 PM
True, that is for a lightly dampened system, but that is also assuming that amplitude is a small displacement,and the system is lightly dampened. I guess I will just have to wait when I take dynamic systems and controls.

thanks though

Qwazelbee
04-29-2005, 11:48 PM
True, that is for a lightly dampened system, but that is also assuming that amplitude is a small displacement,and the system is lightly dampened. I guess I will just have to wait when I take dynamic systems and controls.

thanks though


exactly, don't suppose you're an M.E. major?

Top Shelf
05-01-2005, 06:05 PM
exactly, don't suppose you're an M.E. major?

Not right now, if all goes well this semster I will be. Right now i'm under applied mathmatics.