818 Rear Lower Control Arms

[autostang]

I've had my 818 on the road for a few years. It was built per the manual originally and every year I upgrade something during the winter. I am wondering if it makes sense to upgrade the rear lower control arms and if so what should I go with. The donor had ~155k miles and I am guessing the rubber bushings are fairly shot. Is a firmer rubber bushing and adjustable arm a good choice or would a bearing type connection be better? The car is mostly used for driving on country roads, haven't had it on a track. Some additional ride harshness is ok, but don't want it to get too crazy. Any thoughts are welcome!

[Hobby Racer]

If an all out track car is not your thing, you would be better served by just replacing the old rubber bushings with new polyurethane ones. The increased stiffness will tighten things up without the added NVH of racing spherical heim joints.

[cob427sc]

The poly bushings will work fine. Not sure for normal street setup and driving you need to spend the money on adjustable arms but they are nice. The spherical or Heim joints are also nice but they will make a lot more noice and stiffen the ride. I've used them on several different builds and unless your planning on a lot of track time you probably won't care for the added jolts on the bumps.

[lance corsi]

I’m sort of in between, using heim joints on the wheel side for adjustability, poly bushings on the chassis side to help attenuate road noise.

[autostang]

Thanks for the feedback, this is very helpful.