PRO-TOURING
AMC SPIRIT BUILD
Our owner's, Miranda Rumfelt's,1983 Spirit finds itself constrained by the trappings of a 90s bracket race build, yet it beckons for a bold renaissance. In an era where pro-touring vehicles command unprecedented attention, the factory upgraded Spirit AMX stands as a remarkable testament to the fusion of American automotive heritage and pro-touring aesthetics.
This project represents not just an upgrade transforming the Spirit into a Spirit AMX, but a journey towards modernity, seamlessly blending current design trends with cutting-edge technology. To achieve this, we excitingly have partnered with Summit Racing Equiptment and GearStar Performance Transmissions.
Below, you'll find a breakdown of the components being used in this transformation.
ENGINE & EXHAUST
Commencing with a Chevy 383 Stroker, our initial steps involve replacing the current dual quad fuel system with a Holley Hi-Ram fuel injection setup, designed specifically for classic small-block Chevy engines. This system not only enhances performance and reliability but also offers the potential for future modifications, such as custom porting and forced induction. The upgrade includes a cast-aluminum LS style intake manifold and Holley EFI fuel rails, ensuring a modernized and efficient fuel delivery system.
Following the EFI conversion, we will move on to refinishing the engine with fresh paint, and installing new valve covers. Our focus will then shift towards fitting small block Chevy headers into the AMC engine bay, utilizing either existing headers or crafting custom ones. This phase concludes with the fabrication of a custom 3-inch stainless steel exhaust system, ensuring a comprehensive enhancement of the vehicle's foundation.
STANCE & BRAKES
The standout feature destined to captivate audiences with this build is the distinctive stance of the vehicle. With its JDM-resembling wheel flares and detailed wheels, the AMC Spirit AMX exudes a unique aesthetic that commands attention. However, the true intrigue lies in its ability to elicit curiosity; observers will find themselves compelled to identify the vehicle's base model.
To achieve this, we will implement coil overs in the front and rear, highlighting the transition from rear leaf-spring suspension to coil overs. Additionally, in tandem with this enhancement, we will upgrade the rear drum brake system to disk brakes, ensuring both performance and visual cohesion.
TRANSMISSION
To harness the power of the Chevy 383 Stroker, we’re installing a custom Gearstar-built GM 4L60E, a high-performance four-speed overdrive transmission built for strength and reliability. Gearstar custom-builds each unit with upgraded internals, ensuring smooth shifts and durability under high power.
This 4L60E features top-tier components, including Raybestos Stage 1 frictions and steels, a high-capacity upgraded pump assembly, a heavy-duty hardened sun shell, and a reinforced input drum. It also includes a Transgo Reprogramming Shift Kit with Shift Command which enhances shift precision, uses a Corvette servo, high-energy wide bands, and a .500 boost valve to improve performance. The electronics and wiring are all brand-new, including updated solenoids, a manifold pressure switch, and an electronic speed sensor. All of this goodness is paired with a custom billet torque converter. This transmission is built to handle aggressive driving while maintaining street-friendly drivability.
