Our history starts with hot rodding and a hard focus on forced induction. Long before diesel became part of the picture, the work was in blown engines, turbocharged marine packages, and making serious power live in the real world. That marine program mattered because it pushed turbocharging beyond one-off race hardware into repeatable power options boat builders around the world wanted. The through-line is simple: move more air, support it correctly, and you can make power on just about anything. That thinking shaped everything that came later.
Gale Banks began hot rodding in 1954 and sold his first engine on August 16, 1958. At that point he was working out of a shop he and his father had built at their home on Imperial Highway and Corniche Avenue. The garage faced Imperial Highway, and when the door was open and engines were being assembled, passing motorists would stop, watch, and eventually become customers. That visibility helped him build an early client base.
From there, he moved to a small garage behind Speedomotive Automotive Balancing Service in Lynwood, located off an alley. As his work developed, he made a larger commitment to the business. In 1967 he sold his split-window Corvette, bought a 1956 two-door Chevrolet station wagon, and with about $1,100 rented space at a speed shop on San Gabriel Boulevard. Across the street, a group of industry figures he admired were holding the first meetings of what became SEMA at Eric Grant's insurance office. At the time, he did not fully appreciate the significance of those meetings, and he could not afford the dues, so he did not become a SEMA member until the 1980s.
Banks traced his fascination with turbocharging back to World War II. In his view, the war drove one of the greatest periods of reciprocating-engine development in history, rapidly advancing what piston engines could do. That era left a lasting impression on him, even though the arrival of the jet engine effectively ended further mainstream development of those aircraft reciprocating platforms.
He was especially drawn to wartime aircraft engines available through surplus channels. At places like Blackie Gejeian's surplus sources, a new Merlin engine could be bought in the crate for about $400, and an Allison for even less. For a young engine builder, those engines represented the ultimate mechanical aspiration. That environment helped shape his technical imagination and pushed him toward forced induction and high-output engine development.
What began as hot rodding and building personal performance cars expanded into marine engines. Banks built his first supercharged engine in 1960: a blown Buick Nailhead installed in an R&R 18-foot wooden ski boat. The boat's owner, Jack Stewart, became both a close friend and a business partner for a period of time.
Stewart was well known in Southern California hot-rodding circles as "Mr. Duce" and served for years as president of the Early Rodders. Through that relationship, Banks was introduced more deeply to serious hot rodding and customizing culture. His first shop was also located across Atlantic Avenue from George Barris, which placed him near some of the most influential custom-car figures of the era. He met Dean Jeffries and had gone to high school with painter Junior Conway. Those connections placed him in the middle of a formative Southern California performance scene.
In those early years, Banks' work had nothing to do with diesel. The world he came from was centered on nitromethane, methanol, racing gasoline, and the high-octane pump fuels of the time. He recalled Chevron Custom Supreme at roughly 102 octane, with lead effectively pouring out of the exhaust and no emissions equipment to constrain engine design.
That environment encouraged experimentation and rewarded power density. It was a period when engine builders could pursue airflow, compression, boost, and fuel aggressively, without the regulatory and packaging limitations that would later define production performance engineering. For Banks, that era established the mindset that power was achieved through understanding airflow and combustion, then applying that knowledge wherever engines were used.
A series of fortunate opportunities pushed Banks deeper into turbocharged marine engines. He and his team began building turbocharged marine packages that quickly became attractive as premium power options for boat builders. The appeal was straightforward: turbocharging delivered a substantial increase in output from large-displacement gasoline engines, making them especially compelling in performance marine applications.
As coverage of those engines appeared in publications such as Powerboat magazine, Yachting, and other boating magazines, demand spread internationally. Banks cited examples such as an 850-horsepower twin-turbo marine engine based on a big-block Chevrolet. Interest came not only from domestic customers but also from builders and buyers in places like Italy and New Zealand. Over time, those turbocharged gasoline marine engines became a recognized power option worldwide.
For nearly three decades, Banks said, his company served as the marine power option worldwide. That reputation was built on the combination of hot-rodding instincts, forced-induction knowledge, and the ability to package reliable high-output engines for boats. The marine market gave him a platform to apply turbocharging in a demanding environment where sustained load, cooling, durability, and power all mattered.
This period was significant because it established Banks not just as a local engine builder, but as an internationally known developer of turbocharged powerplants. The marine business also reinforced a pattern that would define much of his later work: identify an engine platform with untapped airflow potential, apply boost intelligently, and turn that into a commercially viable package.
The story Banks outlined begins in traditional hot rodding, moves through aircraft-engine inspiration and early supercharged experimentation, and then matures in the marine world through turbocharged gasoline engines. For a long stretch, diesel was not part of that picture at all. His background was rooted in gasoline performance and the culture that surrounded it.
But that long marine era eventually encountered a major transition. After decades in which turbocharged gasoline marine engines had been the dominant premium option in his business, diesel arrived and changed the direction of the market. In Banks' telling, that moment marked the end of one chapter and the beginning of another, setting up the future-focused engineering path that would follow.