thrust arm bushings

[The Radium King]

Originally Posted by Hasbro

Thanks, very good info. When lowering, are there any other areas to consider that might bind or cause other geometric problems (at approx. -2.5 to -3 degrees camber)? And at these cambers and "wider track", will it still be beneficial to add spacers?

ha, loaded question. a lot of other variables come into play once you start getting outside of factory specs - wheel and tire width, wheel offset, tire sidewall height, wheel diameter, coilovers vs factory suspension. you get inner clearance issues with the struts, thrust arm, parking brake cable, sway bar drop links. ie, the struts are canted a bit; as a result, a larger diameter wheel will have better clearance than a smaller diameter wheel.

outside clearance issues are relatively obvious.

the concern with spacers is that it distances the wheel from the wheel carrier and impacts what is called scrub radius.

finally, just realise that you have four points of contact with the wheel carrier - toe arm, control arm, thrust arm and strut (length, top mount). move one and you impact the other three. this is why the go-fast parts are all adjustable.

[Hasbro]

Originally Posted by The Radium King

ha, loaded question. a lot of other variables come into play once you start getting outside of factory specs - wheel and tire width, wheel offset, tire sidewall height, wheel diameter, coilovers vs factory suspension. you get inner clearance issues with the struts, thrust arm, parking brake cable, sway bar drop links. ie, the struts are canted a bit; as a result, a larger diameter wheel will have better clearance than a smaller diameter wheel.

outside clearance issues are relatively obvious.

the concern with spacers is that it distances the wheel from the wheel carrier and impacts what is called scrub radius.

finally, just realise that you have four points of contact with the wheel carrier - toe arm, control arm, thrust arm and strut (length, top mount). move one and you impact the other three. this is why the go-fast parts are all adjustable.

Yeah, I guess that was a pretty broad question, but thanks for answering. Just trying to get a feel for Boxster suspensions. It's almost like starting all over.