Our Bonneville work kept proving the same point: engines do not run on hype, they run on air mass. If you can pack more dense air into each cylinder, control fuel around it, and keep the engine alive under a long pull, you make real speed. That thinking ran from early hot rods and Studebakers to turbocharged race engines, offshore boats, and the Firebird that delivered exactly the kind of aerodynamic gain Pontiac expected. Bonneville also makes weak links obvious. Rear lift, wheel failures, tire limits, fuel delivery mistakes, and bad aero all show up when the throttle stays down for miles. That is why we talk about air density instead of just boost pressure, and why real data matters. When you understand what the engine is actually ingesting and what the vehicle is doing at speed, you stop guessing and start engineering.
This episode of Speed School features Gale Banks in conversation with Kevin Oeste, host of the Bonneville Up To Speed podcast and owner of the V8 Speed and Resto Shop in Waterloo, Illinois. The discussion begins with their shared interest in land-speed racing and a mutual family connection: both men grew up with fathers who were police officers. Banks explains that hearing Kevin interview Scott Clark and discuss the Vesco family's long-running Turbinator effort prompted him to invite Kevin on the show.
Kevin describes his podcast as a passion project intended to make Bonneville and land-speed racing more understandable and approachable. His goal is not only to document the sport's technical side, but also to help enthusiasts see that they can attend, participate, and become part of the culture. Banks agrees, noting that modern land-speed racing can appear highly specialized and intimidating, yet its roots are deeply connected to grassroots hot rodding.
Banks traces his fascination with speed to childhood. Growing up in Lynwood, California, he wanted the fastest car in town. Southern California's postwar surplus yards and aerospace culture shaped his technical interests, while school training in electronics and mechanical drawing gave him a foundation in both electrical and mechanical engineering. He says that tension between the two disciplines later became an advantage as automotive technology evolved.
His first serious hot rod was a 1931 Ford. Starting from roughly 40 horsepower, he raised output to about 205 horsepower by improving airflow, compression ratio, and engine speed. He converted the engine to F-head configuration with a Riley 4-port head, built his first header around 1956, used a Wyco side-drive magneto driven from a farm-tractor timing gear, installed an Iskenderian camshaft, John Jants pistons, and two Winfield downdraft single-throat carburetors. For Banks, the lesson was established early: power comes from increasing the density of the air charge and, in naturally aspirated form, from increasing rpm.
That principle became the foundation of his engineering philosophy. He emphasizes that the real objective is not simply airflow volume, but air mass. The question, as he frames it, is how to make each cubic foot the cylinders pump more dense. That focus on air density, rather than simplistic pressure numbers, would later define his work with turbocharging and supercharging.
Banks recalls being captivated at age 11 by the aerodynamic 1953 Studebaker Starlight coupe. Compared with the quirky shapes of early-1950s cars, the Studebaker looked futuristic and streamlined. He credits Raymond Loewy's industrial design influence for giving the car a dramatic aerodynamic presence, and he immediately imagined what it could do at El Mirage if properly modified.
Years later he bought a damaged Studebaker from a local wrecking yard for $65. He wanted to build a Studebaker V8 and eventually connected with George Salih, who had access to parts from Studebaker's double-overhead-cam Indy engine program. That engine had originally been commissioned from Leo Goossen, whom Banks describes as one of the great racing-engine designers, with roots in Harry Miller's legendary Indy and board-track engines. Using some of those castings, Banks built a carbureted version with fabricated sheetmetal induction and two Cadillac WCFB four-barrel carburetors. Although intended for the Studebaker, he ultimately sold the engine in 1958 for $1,100 and considered it the first engine sale of his career.
He continued developing Studebaker V8s, enlarging a 232-cubic-inch engine to 260 cubic inches and fitting a Howard billet camshaft with chilled-iron lifters. In street racing on Southern California's Corona Freeway, the car could outrun late-1950s Corvettes. During one run, the overdrive kicked down into third gear at about 8,500 rpm, which helped him win the race but damaged the rod bearings. That failure pushed him toward a small-block Chevrolet conversion and eventually toward serious competition at El Mirage and Bonneville.
With the Studebaker converted to small-block Chevrolet power and a Rochester fuel-injection system, Banks took the car to the dry lakes and set the C/Gas record at 159.01 mph, a strong number for the late 1950s. That success led directly to Bonneville. There he won his category with speeds in the high 180-mph range, though not a record, and raced against Ron Armstrong, who would later become associated with Racepak.
Banks says his first real lesson in Bonneville culture came when he burned an exhaust valve. With no modern communications and little support infrastructure, he expected to wait days for a replacement to arrive by Greyhound bus from Los Angeles. Instead, Armstrong, his direct competitor, asked what he needed, discovered they were using the same TRW valve, and handed him one from his own supply. Banks lapped it in, reassembled the engine, and ultimately beat Armstrong. The gesture taught him what Bonneville represented: competitors race the record and the course, not each other in the drag-racing sense, and mutual support is part of the sport's identity.
Kevin reinforces that point, arguing that Bonneville's culture is unusually generous because everyone understands that eventually they will need help themselves. Unlike heavily commercialized forms of racing, where teams guard every advantage, the salt still rewards cooperation and shared commitment to seeing cars succeed.
Banks then shifts to the 1970s and his growing work with turbocharging. He describes a DeKon Monza IMSA car originally driven by Al Holbert and later owned by Roy Woods. Naturally aspirated with four Weber carburetors, it made about 585 horsepower. Banks converted it to turbocharging, reduced displacement from roughly 358 cubic inches to 304.9 cubic inches, and raised output to 930 horsepower. In Bonneville terms, he says, that moved it from a C engine to a D engine while dramatically increasing power.
The car was so fast at Willow Springs that it overwhelmed its own aerodynamics. On one run, the front air dam fractured and the car ran over it. After reinforcement, the rear Plexiglas window blew out like a giant potato chip, and the brakes proved inadequate, eventually leading to Ferrari brake components being fitted. Banks uses this story to explain that raw manifold pressure alone is not the right way to think about forced induction. He dislikes the casual use of the word boost because pressure by itself says nothing about temperature, humidity, or actual oxygen content. What matters is manifold air density: the pounds of dry air per cubic foot.
A later problem at Portland further illustrated his methodical approach. The engine began leaning out at the end of the straightaway, and the crew blamed the carburetor. Banks argued the issue was fuel delivery, not carburetion. Back at the shop he discovered the electric fuel pumps had been mounted upside down, allowing fuel to migrate into the motor section and impair pump operation. He built a flow stand, measured the system's capacity against engine demand, and proved the car could not support the engine's fuel requirements. To demonstrate the engine's viability under sustained load, he arranged to run one at Bonneville in Bruce Geisler's Studebaker.
Installed in Geisler's Studebaker, the road-race engine ran 217 mph at Bonneville without issue. On a later one-way pass with Jack Chote driving, the car approached 230 mph. At that speed, one of the 18-inch Halibrand magnesium wheels exploded, nearly killing the driver and tearing away much of the left rear of the car. Banks notes that these old Indy-style wheels and tires were among the few available options at the time, but they carried serious risk. He references a similar incident involving Stu Hilborn.
The Studebaker also exposed the aerodynamic instability of stock-bodied cars at very high speed. Above roughly 215 to 220 mph, the rear of the car became dangerously light. Because the class required a stock body, Banks could not add a rear wing, so he used legal venting through the body to relieve low pressure behind the rear window. He explains that when airflow separates off the roof, it creates a low-pressure area over the trunk lid, effectively lifting the rear of the car. Once rear traction drops, the car wants to swap ends.
The team experienced repeated spinouts and even made decals to mark them in the rear quarter window like fighter-pilot victory symbols. After several drivers refused to stay in the car, Don Stringfellow finally persisted. On one spin, when Banks asked how many times the car had rotated, Stringfellow replied that he had been too busy counting rosary beads to count the spins. Despite the instability, the car's 217-mph record was impressive for a 300-inch engine in a field where larger blown Studebakers were only running around 202 to 204 mph.
Banks broadens the discussion to Leo Goossen's later work on the Offenhauser Indy engine and the role of Garrett AiResearch in extending its life through turbocharging. He singles out Garrett executive Walt Ware and the TE06-691 turbocharger, which became the standard for turbocharged Offenhauser Indy engines and could support roughly 1,100 horsepower from about 168 cubic inches. Banks used the same turbocharger family in his own marine racing programs.
In offshore racing, where events could run 200 miles at essentially full throttle, Banks demonstrated both the power and durability advantages of turbocharging. His 430-cubic-inch engines made about 930 horsepower and won decisively. When rules reduced displacement first to 400 cubic inches and then to 358 cubic inches, he maintained competitiveness by increasing engine speed rather than surrendering power. Through all of this, Iskenderian camshafts remained part of the program.
The durability results were especially striking. While many competitors cycled through multiple naturally aspirated 500-inch engines over a season, Banks' turbocharged 358-inch engines ran an entire year, won the world championship at Key West, and set kilo records on the same pair of engines. He argues that turbocharging is inherently easier on engines than belt-driven supercharging because it recovers exhaust energy rather than imposing a direct mechanical load. In another marine application, an 18-foot Hondo circle boat used twin Indy turbos on methanol without charge-air cooling and produced about 1,800 horsepower, or roughly 100 horsepower per foot of boat length.
The conversation then returns to cars and to a pivotal Pontiac project. After Banks' work on a turbocharged Volvo B21 prototype and a NHTSA research safety car, Pontiac approached him about its new aerodynamic 1982 Firebird. Bob Dorn, then Pontiac's chief engineer, and chief stylist John Schinella wanted Banks to prove the body's aerodynamic advantage at Bonneville. They pointed to his 240-mph Sundowner Corvette and claimed that if he transferred the powertrain into the Firebird, the new car would run 20 mph faster.
Banks was skeptical because the Corvette's shape, influenced by Larry Shinoda, looked slippery. Schinella replied that a 1968 Corvette was like firing an arrow feathers first and was actually more aerodynamic backward. Pontiac supplied an early preproduction Firebird from the Mesa proving grounds under strict secrecy. Banks installed a Ford 9-inch rear axle, a Nash five-speed, and adapted the chassis as needed. He later built several street versions of the concept.
A South African customer first validated the package. Running on a closed highway outside Johannesburg at about 6,000 feet elevation, the Firebird initially reached 238 mph and later, with larger compressor sections, achieved 406 km/h, or 252 mph. At Bonneville, after delays from weather and scheduling, Banks finally ran the Firebird in 1986. It recorded a 267-mph one-way pass and a 262-mph return, averaging exactly 20 mph faster than the Corvette, just as Pontiac had predicted. In 1987, with early Pontiac aluminum Pro Stock heads replacing the original iron heads, the car ran a 277-mph one-way pass and a 268-mph two-way average. Banks says the record stood for 10 years, until 1997, when it was surpassed by a car powered by an engine built by Mike LeFevers, whom Banks had trained.
The Firebird remained very close to stock-bodied. The main visible change was a front fascia with dedicated Ram-Air inlets feeding each turbocharger. Banks stresses his long-standing belief in true cold Ram-Air as "the poor man's supercharger." He criticizes underhood open-element filters on supercharged engines because they ingest hot, expanded, low-density air, only to compress it again and then ask the intercooler to undo the damage.
Banks closes the technical portion by touching on later diesel and military programs. He mentions the T-Welch-Banks streamliner, the Sidewinder Dakota, and an FIA diesel pickup record set in October 2002 at 217 mph, with a best mile of 222 mph. The truck towed its own pit trailer to the salt. He emphasizes the difficulty of FIA records, which require two runs in opposite directions within one hour of starting the first pass. He contrasts that with later claims by others to the "world's fastest diesel pickup," arguing that a slower national record does not supersede a faster FIA international record. He also notes that Banks diesel records were set smoke-free, which he sees as evidence of efficient, durable tuning.
The discussion briefly expands into Banks' military engine work. Since 1976, his company has supplied twin-turbo big-block marine engines to Navy special forces and later developed engines for the Joint Light Tactical Vehicle built by Oshkosh. He says Banks has produced more than 18,000 engines for that platform and expects production to continue into 2034. He also describes current work on diesel-hybrid prototype power systems for wheeled and tracked military vehicles up to about 60 tons, emphasizing the tactical value of silent operation.
Kevin then explains his own route into the Bonneville world. Growing up near Chicago, he loved cars from an early age and also developed media skills through a high-school FM radio station and local cable television. Work at Hot Rod magazine and its television projects allowed him to combine those interests. After moving with his wife to Waterloo, Illinois, to start V8 Speed and Resto Shop and V8TV Productions, he finally attended Bonneville after years of wanting to go. The landscape, the racers, and the atmosphere made an immediate impression. He felt as though he had come home to a place he had never really known.
That experience led him to create the Bonneville Up To Speed podcast in cooperation with the SCTA. His aim is to preserve stories, explain the sport, and broaden its audience. Banks sees that effort as part of a recurring cycle in Bonneville history: periods of low visibility followed by renewed public attention driven by people willing to tell the story well. The episode ends with Banks answering a listener question about Banks' upcoming supercharged Duramax turnkey engine program. He says the LockJaw development vehicle is the test mule, that the engine will be sold only when throttle response and durability meet his standards, and that it will be road legal in 1966-and-earlier vehicles without emissions equipment. He adds that the company has recently passed Euro 3 emissions requirements for some military-related applications and intends to deliver strong diesel performance without excessive smoke.