Is there much advantage to upgrading the trailing arms?
 

I was wondering if upgrading my trailing arms would help my car to handle any better? What advantages are there to solid mount trailing arms over the stock ones with bushings?
Thanks for any input

They help to reduce wheel hop, they also allow installation of wider wheels. Usually installed with toe links as well.

http://banzai-racing.com/store/93+_r...ling_arms.html

http://banzai-racing.com/store/93+_rx-7_toelinks.html

There is no advantage to changing the trailing arms. They stock arms work very nicely. If you were were building a "track only" car, there might be a very minor improvement with stiffer bushings. For a street car, it is a waste of money to replace them.

My understanding is that aftermarket trailing arms elimate or drastically reduce the wear on the pillow balls.

I have a matched set of trailing arms and toe links from Rotary Extreme on my car. I noticed a substantial difference before and after vs. stock when autocrossing. It's tough to quantify with improved times, as my driving is always improving, but the rear end of the car became more predictable at the limit, and my times have improved over the season. I would consider that it inspires more confidence and allowed me to push just a bit harder. Eliminating those rubber bushings in the trailing arms and toe links does tighten things up. Lack of compliance means no alignment changes during hard braking /cornering, which would be exaggerated by use of R-comp tires as well. They don't noticeably contribute to increased road noise vs. stock.

Also, if you're wanting to run a wider wheel, they are pretty much a must, as the stock bits will interfere with more aggressive width and offset choices.