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G force performance engineering11/11/2023 ![]() ![]() Rather than force customers to use a system that solidly locks out the differential bushings and removes nearly all movementbut can introduce prodigious and unwanted NVHthe GForce/SuperPro design gives them another option.Īn introduction for Powell from Aussie shop owner Rob Herrod of Herrod Performance to Graham Scudamore-Smith of SuperPro started the ball rolling on this project. We knew then we needed to educate people on the critical nature of bushings to help their driveline parts live under these power levels, and also the importance for us to design bushing kits that would not only hold up, but enhance the driving experience of these vehicles. We have calculated as much as 7 degrees of pinion movement +/- during a single pass! That video shows us that the cradle was pulling away from the body by as much as an inchlike it was trying to spit it out the back of the car, Powell explained. After stumbling upon an older video posted by an engineer who mounted nothing short of seven cameras and an accelerometer under his car during a couple of passes, we realized just how much of an issue this was and that we needed to start engineering a solution immediately. What we underestimated was the amount of cradle movement that was occurring under there, he said. Interestingly, it was a video posted on the internet that showed Powell and his team that they had to figure out a better solution.īased on some of our research and findings, we knew that pinion movement was an issue and was plaguing these cars. The companies have developed bushings that offer the proper amount of compliance and performance for IRS-equipped vehiclesS550 Mustangs today, with Challengers and Chargers in the pipelinethat have a ton of power. GForce released the new ProBushing line, which combines the benefits of rubber bushings on the street to ensure a smooth, comfortable ride, and on the flip side, the performance of a solid mount at the track, which will help to prevent costly equipment failures like those seen in the IRS axles and even the differential case. To combat these problems that have become the bane of the S550 owner, G-Force collaborated with Australia's SuperPro. When you start upgrading the suspension in the rear, a lot of guys say they can feel it in the seat of their pants, the roof of the car, and see it in the rearview mirror. Everything is mounted to the chassis as it's all one unit, and all of those harmonics go up through the body. When you put a driveshaft in the car, there are going to be some sacrifices. "The magic bullet is reducing motion without inducing NVH, Powell elaborated. The driveshaft has become a tuning fork, a speaker, an amplifier for the harmonics that are in this car, he said. When you put a driveshaft in and there's a vibration, 9 times out of 10, it's not the driveshaft at all. This becomes all too clear when you install a one-piece driveshaft. With the S550, it appears to be especially prominent. The Mustangs in particular have always struggled with NVH issues. Traditionally performance bushings are manufactured from polyurethane, but as Powell explains, not just any polyurethane is ideal when looking at the S550 Mustang chassis. When an enthusiast is looking to improve performance, bushing replacement is often one of the first places to turn. These components can be thought of as cushions for the suspension. While this material is excellent for compliance over bumps reducing noise, vibration, and harshness and delivering a quiet ride, rubber bushings are in no way designed for high-performance applications. Traditionally, OEM bushings are made of soft rubber. But according to Jesse Powell and the fine folks at GForce Performance Engineering, they can make all the difference in your high-powered performance car that utilizes an independent rear suspension. Properly performing bushings are mostly out-of-sight, out-of-mind components that aren't even thought about until one or more fails. They aren't shiny, billet, or covered in a high-visibility hue to catch the eye. Let's face it, chassis bushings are decidedly unsexy performance parts. ![]() Written by Jason Reiss Photography courtesy of GForce Performance Engineering ![]()
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