Originally Posted by chevy34
Chears guys I was wondering if it was to do with the pitch off the chassis under brakes and drive and the roll centre moving in the direction you would want it to in these situations. And it seams I was on the right train of thought with that one.
I've made and fitted dozens of Watts links over the years, conventionl and Very Low Roll Center assymetric ones.
Most have been with a chassis mounted rocker and I usually don't hear anything negative about the handling change when they are done that way.
When I'm asked the theory and pros and cons I am happy to reply that I am a bit unsure but feel as if the fixed roll center and unsprung weight COG moving to gether are beneficial.
Remember that the lower the Watts rocker's pivot is the lwr the RC will be and the body will move around that center with a different arc, so clearances need to be kept in mind.
RC height is used as in concert with stabiliser bars as a defacto roll stiffness.roll axis tuning tool. A low rear RC will usually give good results provided you have enough bar to keep the body stable.