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Suzuki Samurai Suspension Upgrade - Project Sami Supreme

Rear Angle
Matt Rust | Writer
Posted April 1, 2008

Part II: Longer & Stronger

Picking up where we left off with the first part of our Sami Supreme project, a master plan was formulated to begin the radical transformation. Next, a toyota five-speed transmission was installed along with a dual-T-case setup, and it was time to address change in tire size. The 35-inch Baja Claws that were on the Sami from its initial buildup December 2003 issue) were great tires, as were the Eaton steel beadlock wheels they were mounted on, but there were many situations on the trail where a larger tire would have helped. The steel beadlock wheels are extremely tough wheels, but not the lightest, especially when you're trying to turn them with a 65hp engine, so a decision was made to upgrade both the wheels and tires to something taller and lighter.

After a bit of "wheelin' and dealin'," the Baja claws and Eatons were sold and replaced with an almost new set of 37x17 Goodyear MT/Rs. The MT/R is a great tire, suitable for a wide range of terrain, and is fairly lightweight compared to similar tires. The only problem was that the new 37-inch tires would not clear the firewall, so the front axle would have to be pushed forward a bit. This in turn would require modification to the front fenders, relocating the steering box, and the entire front suspension would have to be completely redesigned. A benefit of moving the axle forward would be a longer wheelbase. The current 87-inch wheelbase was simply too short to conquer extreme angles and hillclimbs, so a stretch in that department would really help.

With a bit of research and inquiries into popular wheelbase lengths, it was finally determined that 100-110 inches is optimal for a rig riding on 37-inch tires. Averaging this figure, it was decided that the new wheelbase should be 105 inches. With the wheelbase determined, it was time to figure out what to do with the suspension. While the Jeep Wrangler YJ leaf springs that had been on the sami for the past four years offered a lot of flex and stability, the setup was getting a little worn-out, and with all of the modifications to the wheelbase and chassis, it only seemed natural to step up to a link setup. There are a lot of different link setups out there to choose from, so the next crucial decision would be finding a setup that would work on the Sami while providing the ultimate in flex and drivability.

After discussing the direction of our project with all-Pro off-road, it was decided that its taco' supreme three-link kit just might work for our application. This kit is actually designed to fit a solid axle under a Toyota tacoma, but with some rough measurements and eyeballing, it appeared to have a feasible crossover application to our samurai.

Looking further into linked-suspension setups and becoming thoroughly confused, a call was made to All-Pro Off-Road. Considering cost, clearance, usage, and everything else involved with the project, All-Pro recommended a three-link setup with a Panhard bar and air shocks. As luck would have it, the company had just developed its Taco' Supreme system, which is a weld-on front three-link (with Panhard bar) setup that could possibly be adapted to the samurai. Designed to retrofit a solid axle under the Toyota Tacoma, the Taco' Supreme kit includes all necessary frame and axle brackets as well as shock towers and heavy-duty adjustable links outfitted with large heim joints and extra-tough Johnny Joints.

With three-link kit in hand, it was evident that with some slight modifications, the kit would work on the ront of the Samurai and even push the front axle forward just the right amount to allow firewall clearance for the new 37-inch tires. The nice thing about using the All-Pro kit is that all of the engineering was already done by professionals, ensuring correct suspension geometry. Once the front suspension was set up, the rear could be duplicated using the same components to also provide correct geometry.

Sources

Poly Performance
San Luis Obispo, CA 93401
805-783-2060
www.polyperformance.com
All-Pro Off-Road
Hemet, CA 92543
951-658-7077
www.allprooffroad.com
Jaz Products
800-525-8133
www.jazproducts.com
Coast Drive Line & Gear
www.coastdriveline.com
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