I thought I would go to a neutral source about the soundness, durability, and risks of the Dupree subframe bushing modification. I talked with Clark Steppler, the programmer and engineer at Jim Wolf Technology. He is an extremely bright and personable guy. I briefly explained the current debate re: the subframe spacer modification. His reponse was that this type of mod has been used in Japan for a number of years (thatis, filling the travel space in the subframe with another material). It was his opinion that there is actually less chance of the bushing blowing out or rupturing with the modification since there is less travel in the subframe components. He stated that the bushing would be more likely to be compromised if it was in stock form and subjected to a violent up and down force (ie. significant wheel hop or hitting a pothole). He further stated that the only situation where he could see a potential problem was if the bushing was so compressed that it was deformed in the compression process and had no "squish" left in it at all. My own experience (on a car with 180,000 miles) is the elimination of (virtually) all of my wheel hop, allowing the car to be capable of repeated 1.9 60' timed with 225/50/16 Nitto drag radials. I have found the mod to be a benefit (I had the earlier version installed about 2 years and 50,000 miles ago) rather than a liability. Mark
Follow Ups
Subframe bushing spacers according to JWT>>>> - SirpriZ20:30:58 04/16/02
