Well, that didn’t take long. After completing the latest upgrades to Project SC650 — including new Weld wheels with optional beadlock rears wrapped in Mickey Thompson tires, a full TBM braking setup to reduce weight and accommodate said wheels, and a pair of heavy-duty axles to handle the increased traction — we knew it was time to upgrade the suspension. To complement these improvements, we turned to BMR Suspension and Viking Performance to ensure our Performance Pack stays planted during its first outing, avoiding the hop, skip, and jump behavior often seen in the independent rear suspension S550 and S650 chassis.
Well, you could say things are getting pretty serious with our S650. This is not the sight we thought we’d see so early on, but here we are — gearing up to install the new suspension from BMR Suspension and Viking Performance. Let’s rock and roll!
Challenges Of An Independent Rear Suspension
Up to this point, our upgrades have focused on improving traction and shedding weight, a simple yet effective recipe for success. However, suspension is a critical factor in a car’s ability to launch hard and consistently down the track. For us, owning the latest generations of Mustangs meant battling the challenges of drag racing with an independent rear suspension.
Before you start thinking about a live axle swap for your 2015-and-newer Mustang, hold off — we discovered with our 2020 Shelby GT500 that a properly set up IRS can handle track duties just fine. To delve into the multi-faceted benefits of suspension upgrades, we spoke with Connor Capar from BMR Suspension to learn why our latest changes were worth the investment.
An EcoSystem Of Its Own
Much like the fuel system or drivetrain, suspension operates as its own ecosystem, with each component playing a distinct role to ensure optimal performance. When these parts work harmoniously, they create a winning formula — one that’s not only felt in the car’s handling but also measurable in the trophy slips we collect after each successful pass. We decided on the entire suspension revolving around BMR and Viking Products starting with our pesky rearend.
OK, who left the Sawzall and mallet where Seth could find them? Replacing bushings isn’t exactly the most glamorous or easy part of any installation, but the payoff is absolutely worth it.
One thing we’ve consistently noticed on previous builds is the excessive deflection and wallet-scary wheel hop in the IRS…
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