Quote:
Originally Posted by Eson
Why do people still use Powerflex? I've heard nothing but failures and premature fatigue.
Go with AKG.
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I know that this is an old post...
15 years ago, I tried using Powerflex bushings on my E30 M3 track car. Both the FCAB and the rear semi-TA bushings distended after only a couple of events. Popped them out and trashed them. Bought AKG. They lasted about 2x as long but eventually failed in a similar manner. Again, wasted money.
Went back to the factory M3 solid rubber bushings. I was no slower and my problems all went away.
I had similar problems with urethane motor mounts for that car. I only got away from continuously failed motor mounts with the 7-series mount which was much more substantial and had the added benefit of lowering the motor ~1/4" and shifting it back ~3/8".
If you're going to bypass the rubber bushings, I'd say to go with bearings. However, this will help you locate the next weak link in the chain pretty quickly.