Wheel hop in fwd car

[womble]

Hi all,

Im not sure if this is purely a suspension question or powertrain due to conflicting advice on this subject.
Basically what causes wheel hop in a fwd car? Is it transmission/engine windup or more to do with the condition of suspension components eg. worn bushes, dampers, etc?
Or is it a combination of all these factors?

Comments please!

 

[GregLocock]

What do each of you mean by wheelhop? Technically it is the primary vertical resonance of the unsprung mass on the tyre wall compliance and the referred road spring compliance.

I don't think that is what you mean.

If you describe the symptoms rather than (mis)using technical terminology then we'll get to the answer faster. Check out the threads on powerhop and axle tramp, they are very relevant. Cheers

Greg Locock

 

[FourJawChuck]

Any compliance in the system tends to reinforce occillatory movements at certain frequencies, get rid of components that can deflect (rubber). Generally rigid bushing materials (Nylon, aluminum or even high durometer polyurethane) help the situation.

Damping of course helps as in the Ford Mustang axle damper but axle shaft windup is hard to reduce without fabricating larger diameter axles.