Building an Enthusiast-Engineered Supercar Based on the Mitsubishi Eclipse

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By Car Brand Experts


What sets Mitsubishi apart—the renowned Japanese car manufacturer—is not its current endeavors but the classic vehicles it produced. For instance, the fourth iteration of the Eclipse, often overlooked, caught the attention of an amateur engineer from Canada, who saw it as an ideal base for his ambitious project. James from Speed Farm believes this platform is ripe for creating something extraordinary. And extraordinary it is—a formidable mid-engine Eclipse track car is taking shape in his workshop, with significant progress already made.

As the project unfolds, James has successfully brought his mid-engine Eclipse to life, with the engine now positioned at the rear of the vehicle. “The engine relocation process went smoothly without encountering major hurdles,” he shared. “While time-consuming and demanding extensive research, the overall effort was well worth it.”

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The inception of this ambitious endeavor traces back to James’ initial vehicle, a 2009 Mitsubishi Eclipse GS featuring enhanced internals and a bespoke turbo configuration. Despite enjoying its performance on the track, he realized that the car suffered from poor grip and overall physics hindrances. This prompted him to relocate the engine from its front placement to a more suitable…

one at the back.

Opting for a 6G75 3.8-liter six-cylinder engine over the smaller 4G69 model was a deliberate choice by James for a multitude of reasons. Not only does this engine sit at a 30-degree forward tilt, improving the vehicle’s physics with its proximity to the rear axle, but it also boasts a larger water pump compared to its four-cylinder counterpart. Given that James retained the radiator’s original placement while shifting the engine rearward, a larger pump was necessary to handle the increased coolant volume.

When placing the motor at the rear of the Eclipse, the entire front subframe of the car was essentially replicated at the rear of the vehicle. Upon completion of this process—and the incorporation of a simulated steering rack to keep the rear wheels aligned—the remaining suspension components were easily installed. For a glimpse of what a steering rack that doesn’t steer looks like, carefully observe the steel bar shown above. Additional modifications were made to the engine, including a new intake, headers, tuning, resulting in a power increase to over 279 horsepower at the wheels.

Thus far, achieving this level of progress might satisfy most individuals; however, James asserts that this project still has a considerable way to go. In terms of adding a turbocharger, he had previously expressed uncertainty prior to the engine swap. Presently, the turbocharging plan appears much more definitive. The potential installation of twin K04 turbochargers or a larger single PT6266 turbo, as well as numerous other modifications—primarily focused on aerodynamics—are all under consideration. The inclusion of a flat floor, wing, and splitter are among the options being weighed for the project, with James utilizing aerodynamic simulation software to optimize the solutions for seamless integration.

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James from Speed Farm

In addition to the aforementioned advancements, the Canadian enthusiast has also been diligently researching the optimal suspension setup for the vehicle. He has conducted comparisons of various coilovers from a range of manufacturers, as well as some from stock sports cars, in order to achieve the ideal handling characteristics. Once all details are finalized, he envisions the car evolving into something truly remarkable. For those wondering about retaining the front engine to transform it into a two-motor, all-wheel-drive Eclipse, James emphasized the paramount importance of mastering the physics. While dual-motor configurations are intriguing, James is more inclined towards creating a genuine track machine, as opposed to a haphazard amalgamation.

Eagerly anticipating the final outcomes, James has already begun testing the vehicle at an event organized by Falcon Autosport near Kitchener, Ontario. While ice racing isn’t the primary objective, he had the foresight to ensure that the heater was functional. Nevertheless, the ongoing progress suggests that the car promises an exhilarating driving experience. Within a short span of time, James intends to conduct track testing to evaluate the performance. If only Mitsubishi possessed a similar level of ambition as this innovative individual from the icy northern regions.

Do you have a tip or query for the author? Contact them here: peter@thedrive.com

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