The real problem is not turbocharging itself. The problem is bad system design. If a twin-turbo C8 pulls hot air from the engine bay, the compressor starts with low-density air and adds even more heat. That drives charge temperature up, reduces detonation margin, and can push the engine into failure. Looking at boost alone misses the point. The engine pumps cubic feet, and what matters is how much air mass and density actually reach the manifold and cylinders. Temperature, pressure, humidity, charge cooling, and exhaust backpressure all matter. Ignore those, and you can make a big dyno number right before you hurt the engine.
This episode opens as a long-form conversation between Gale Banks and Walt Ware, who describe a friendship stretching back to the 1970s and parallel engineering careers that began much earlier. Both were born in 1942, only five days apart, and both developed an early fascination with machinery and speed. Banks grew up in Southern California, while Ware was born in Miami, where his father had helped build the hospital in which he was born.
Their early automotive stories reveal how strong that interest became before either man had a formal engineering career. Ware's parents would not allow him to own a car, motorcycle, or scooter, even though he worked and could have paid for one himself. He did not buy his first car until after graduating from Georgia Tech, when he immediately chose a 1965½ Chevelle SS Z16 with the 396 big-block and four-speed. Banks had the opposite temperament: he wanted to drive so badly that he hot-wired his mother's car as a kid. Both men also hid unfinished project cars in their youth. Ware had a 1937 Ford with no engine or transmission, intended for an early Chrysler Hemi swap, while Banks had a 1937 Chevy coupe and longed for his father's discarded 1937 LaSalle business coupe. Their memories of GMC inline-six hot rods, Wayne heads, multiple carburetors, and LaSalle transmissions establish the mechanical culture that shaped both of them before college or industry.
Ware attended Georgia Tech and completed his engineering degree in four years. He briefly doubled into nuclear studies because, at the time, nuclear power looked like the future. He eventually decided not to pursue that path further, concluding that the field would not develop pragmatically enough within the span of his own career. More importantly, his real passion remained cars and performance.
That passion influenced even his earliest job applications. When Carroll Shelby launched the Cobra, Ware saw it as the ideal first car and even drove one, but decided against buying it because it cost more than a house. He also wrote Shelby asking for a job and received a polite rejection. That did not end his effort to move toward performance engineering. Instead, he looked for work that might place him geographically closer to Southern California and, eventually, closer to the automotive world he wanted to enter.
Ware's first major professional step was with Schlumberger in oil-well surveying and exploration. He chose the company for several reasons, including its strong recruiting presence at Georgia Tech, but also because he hoped for an assignment in Venice, California. Instead, he ended up working offshore in the Gulf of Mexico.
The work was technically demanding and far more advanced than many people would assume for the mid-1960s. Ware described it as a combination of field engineering, geophysics, and instrumentation. His team used gyroscopic tools to determine the actual path of a borehole, effectively an early form of positional mapping long before modern GPS. They also ran electrical resistivity tools to infer subsurface composition and used a formation-density compensated tool that sent radioactive gamma rays into the surrounding earth and measured the response. From those measurements, they could determine whether oil was present, estimate how much might be there, and judge how producible it would be. Directional drilling from offshore platforms made accurate borehole mapping especially important because multiple leases could be reached from a single structure.
Ware emphasized that Schlumberger demanded deep technical competence. Engineers were expected to defend their knowledge before review boards in Houston at a level he considered harder than college itself. He enjoyed the intellectual challenge and the outdoor nature of the work, preferring rigs in the middle of the ocean to a desk job.
A major turning point came with Hurricane Betsy in September 1965. Ware was working offshore when the storm approached. He described being among the last men evacuated by helicopter from the rigs. The aircraft was so overloaded that after one final pickup, it slammed back onto the deck. The pilot ordered everyone to throw their bags off before attempting takeoff again. On the second try, the helicopter barely cleared the water as the storm wall closed in.
Meanwhile, Ware's wife was waiting in a trailer park in Golden Meadow, Louisiana, with their car running, accompanied by her mother. The conditions were severe enough that local houses were built on stilts and often lacked conventional windows and doors. After Ware reached shore, they drove roughly 300 miles north without stopping until they found a motel. When they returned weeks later, there had been no water, gas, or electricity for three weeks, and their trailer had been scattered into the bayou. Ware recovered only a few possessions, including engineering books and some personal memorabilia.
That experience convinced him that he did not want to keep his family in that environment. Since Schlumberger was not moving him to California, he began looking elsewhere. He considered Buick but assumed the work would be body or trim related rather than propulsion. Instead, he accepted an offer from McDonnell Aircraft.
At McDonnell in St. Louis, Ware became a prime propulsion engineer on the F4 Phantom during the Vietnam era. The aircraft had originally been conceived as a missile and nuclear platform rather than a close-in dogfighter, but combat realities demanded major changes. Ware's assignment was to re-engineer the fuel system so the aircraft could sustain the full range of high-G and negative-G maneuvers required in air combat against MiGs.
That meant ensuring uninterrupted fuel delivery through rolls, dives, and aggressive directional changes. He also worked closely with GE, which supplied the J79 engines, in regular early-morning meetings. Another major issue was smoke abatement. The engines produced visible black smoke, which made the aircraft easier to track visually and from the ground. In addition, once 20 mm cannons were added, combustion gases from firing could enter the air intakes and disrupt engine operation. Ware described the program as a demanding systems-engineering effort involving fuel delivery, intake behavior, smoke reduction, and combat survivability.
All of this was done before modern computer modeling. Calculations relied on tools such as large Frieden calculators, slide rules, and engineering judgment. Ware also recalled the rigid union environment at McDonnell, where even moving office equipment could trigger grievances. He ignored some of those restrictions when necessary to get the work done.
Ware next moved to Pratt & Whitney in West Palm Beach, Florida, where he worked on the SR-71 Blackbird's J58 engine. He described this as one of the most exciting assignments of his career. The engine was not simply a conventional turbojet. At extreme speed, the inlet spike and bypass system allowed it to transition toward Ram-Air and ramjet-like behavior, with the compressor eventually becoming less central to total propulsion than the inlet and afterburning system.
A key feature was the translating inlet spike, which moved about 42 inches depending on speed and altitude. Its purpose was to control shock position and maintain proper airflow into the engine. If the shock formed in the wrong place, the engine could experience an unstart, a violent loss of proper inlet function that could upset the entire aircraft. Ware's responsibility began where the compressor ended and extended through the burner-can section to the turbine inlet, with additional interaction into the afterburner system.
He explained that the engine's ultimate limitation was metal temperature. The turbine blades and hot-section components depended on advanced alloys such as Waspaloy and Hastelloy X. His job involved controlling combustion and temperature distribution so the turbine root stayed as cool as possible while the outer blade region could run hotter, maximizing performance without destroying the hardware. To study airflow through the burner cans, he used transparent water-table methods and visual flow techniques, since there was no CFD or digital simulation available.
One of his first assignments was solving a burner-can structural failure in which the center tube, nicknamed the donkey, would resonate, break off, and go through the turbine. Ware instrumented the hardware with thermocouples, ran engines to gather temperature data, then mounted the parts on a shaker table and heated them inductively to operating temperature. By reproducing the failure, he identified the natural frequency problem and redesigned the structure with reinforcements that changed the resonance without disrupting airflow. He later wrote the repair and overhaul manual for the SR-71 engine and then moved onto early work for the F-14 program, including development around its first-stage composite compressor concept.
Despite the technical excitement of military propulsion, Ware became disillusioned with the instability of government contract work. He recalled the day Pratt & Whitney lost the SST program. Engineers in the office began receiving phone calls one by one, leaving the room and not returning. Watching the room empty convinced him that he no longer wanted his career tied to that cycle of contract wins and losses.
That decision pushed him toward Garrett. He interviewed with Al Selver, a highly accomplished engineer known for air-bearing patents. Ware described the interview as confrontational enough that he left unsure whether Selver hated him or respected him. He got the job. Garrett gave him a path back into turbo machinery, which had fascinated him since childhood because it represented the closest practical thing to a perpetual-motion idea: recovering wasted exhaust energy and turning it into useful power.
Ware and Banks both emphasized why turbocharging mattered so much to them. It was fundamentally about power density and efficient use of air and fuel. Banks cited examples such as BMW's 1.5-liter Formula One engine making roughly 1,100 horsepower in the 1980s, illustrating how dramatically turbocharging could increase output relative to displacement. For both men, the turbocharger was not just a component but a philosophy of extracting more from what the engine already had.
A substantial portion of the discussion turns from biography to engineering philosophy, especially the importance of air density. Banks and Ware criticize simplistic comparisons between internal-combustion vehicles and battery-electric vehicles, arguing that many public discussions ignore energy density by volume and by mass. Banks notes that a Ford F-150 Lightning carries roughly 1,500 pounds more mass than a conventional F-150, while the GMC Hummer EV weighs about 9,000 pounds. Their point is not that electrification has no place, but that battery energy density remains far below gasoline and especially diesel.
That same density-centered thinking carries directly into turbocharging. Both men argue that enthusiasts and media often focus on boost pressure while ignoring the variables that actually determine engine performance and durability: absolute pressure, temperature, and humidity. An engine pumps cubic feet of air, not pounds of boost. What matters is air mass per unit volume at the intake manifold and how much of that density survives through the ports and valves into the cylinder.
They use a modern twin-turbo C8 Corvette example to illustrate the problem. Banks criticizes systems that place air filters in the hot engine bay near the turbochargers, forcing the compressor to ingest elevated inlet temperatures before adding even more heat through compression. He argues that this compromises both compressor operating conditions and charge-air temperature, increasing detonation risk and reducing durability. He also points out that adding turbochargers can create exhaust backpressure and internal EGR if the system is not engineered as a whole. Their broader argument is that many builders celebrate peak dyno numbers while remaining unaware of the thermal and density-related causes of engine failure.
For Banks, this is why density measurement is the gold standard. It reveals whether the turbocharger is being overworked, whether the charge-air cooler is adequate, and whether the engine is being pushed into destructive conditions. Both men frame this as part of a larger mission: preserving enthusiasm for internal combustion by teaching people how to make engines powerful, durable, and cleaner through sound engineering rather than guesswork.
Ware closes this portion of the conversation by explaining how Garrett entered the turbocharger business in the first place. According to his account, Caterpillar had built a turbocharger in its own laboratory in the early 1950s and sent it to Garrett for a critical design review. Garrett's expertise in small gas turbines impressed Caterpillar enough that Caterpillar then asked Garrett to manufacture turbochargers for them. In Ware's telling, Caterpillar effectively funded Garrett's entry into the turbocharger business because it recognized Garrett as the stronger turbomachinery organization.
Ware arrived at Garrett on January 1, 1969, after finishing his Pratt & Whitney work. That date marks the beginning of the period Banks most wants to explore in future episodes: Garrett's rise in turbocharging, Ware's 22-year career there, and the overlap with Banks' own work in marine, automotive, diesel, and racing applications. Banks notes that while he was already experimenting with turbocharged marine engines using RayJay hardware and custom turbine-housing work, Ware was entering the company that would become central to many of the most important turbocharged programs in performance and diesel history.
The conversation ends by setting up later installments focused on Garrett, racing, Caterpillar, Smokey Yunick, Indianapolis, Can-Am, Bonneville, marine engines, the Buick Grand National and GNX, and the 7.3-liter Ford Power Stroke with its Z-axis turbocharger. This first episode therefore serves as the foundation: a technical life story that moves from youthful hot-rodding, through oil exploration and military propulsion, to the threshold of modern turbocharging.