The real advantage of a turbocharger is simple: it compresses air with exhaust energy instead of pulling power off the crankshaft like a blower. At the same boost level, that leaves more horsepower at the flywheel. Just as important, wastegate control lets us manage turbo speed and boost so the engine can make a broader, more usable torque curve instead of one fixed result. On a small-block Chevy, the hard part isn’t just making boost. It’s building a system that survives. That’s why this twin-turbo Sidewinder setup uses rugged engine parts for boosted use and high-silicon ductile iron exhaust manifolds instead of crack-prone fabricated tubular pieces. The result is a bolt-on package designed to avoid the usual failures—cracked manifolds, sagging turbos, and blown gaskets—while keeping installation straightforward. If you want serious power without turning the project into a fabrication job, that’s the point. A healthy stock small-block can handle the kit at roughly 600 horsepower. If you want 1,100-plus, the engine has to be built for it.
The video opens by framing turbocharging as one of the most effective modern paths to big horsepower, then introduces the shop's first turbo installation. That installation is guided by Gale Banks, whose career is presented as a major part of turbocharging's development in high-performance automotive work. After starting as a young hot rodder focused on power and speed, Banks opened a speed shop and began working with turbochargers when they were still a relatively unfamiliar power adder.
Over the following decades, Banks developed turbocharged combinations that set records on land and water. The recap highlights several milestones, including the world's fastest pickup truck and the fastest piston-engine automobile. It also notes that Banks held the record for the fastest passenger car for 10 years with an 800-horsepower twin-turbo Firebird that ran on the Bonneville Salt Flats. By the time of this video, Banks Engineering had grown into a 200-employee engineering and manufacturing operation in California, known for power-enhancement products for gasoline and diesel trucks and motorhomes, while still pursuing advanced turbo systems for street and strip performance.
Banks arrives with a Sidewinder crate engine built around a twin-turbo Chevrolet small-block. Before the installation begins, he explains the basic operating principle of a turbocharger. In his description, a turbocharger is a compressor driven by a turbine. Exhaust gas flows through the turbine housing at the rear of the unit, spinning the shaft to roughly 100,000 rpm, and sometimes beyond that. That shaft drives the compressor at the front, where incoming air is compressed and delivered under boost pressure through the plenum, through the throttle body, and into the engine.
This particular engine uses direct-port fuel injection. Banks uses it as a platform to explain why he favored turbocharging even in his earliest experiments during the late 1950s and early 1960s. Compared with supercharged engines he was building at the same time, he found that a turbocharged engine could make substantially more power at the same boost level, on the same engine and fuel. He states that the advantage could be as much as 200 horsepower. The reason, he explains, is that a belt-driven blower consumes crankshaft power parasitically, while a turbocharger is driven by otherwise wasted exhaust energy. Although the turbo creates some backpressure, it does not absorb nearly as much shaft horsepower, so more power reaches the flywheel.
Banks then expands on the control advantages of a turbo system. By using a wastegate, he can regulate how much exhaust gas passes through the turbine, which lets him alter turbocharger speed independently of engine speed. In practical terms, that means he can shape the torque curve far more precisely than with a conventional blower. Rather than being locked into a fixed drive ratio, the turbo system can be tuned to deliver boost where it is most useful.
He also addresses throttle response directly, arguing that turbo lag is no longer the limiting issue many enthusiasts assume it to be. In his view, traction has become the bigger problem than power delivery. Another benefit of wastegate-based boost control is fuel flexibility. By changing boost level, the engine can be adjusted for different octane fuels. Banks says this combination can run on 87-octane fuel at lower boost settings and can be turned up for 100-octane or higher. On 100-octane clear unleaded fuel, he states that the engine produces 1,115 horsepower.
Banks explains that the twin-turbo small-block Chevrolet concept is both familiar and newly relevant. He points out that in the 1970s and early 1980s he built many twin-turbo Firebirds, Camaros, and Corvettes in the 700-horsepower range, including what he describes as the first magazine-tested street machine to exceed 200 mph. After spending the following decades heavily involved in diesel development, he returned to the gasoline small-block market with the view that no one had yet offered a true bolt-on, ready-to-go twin-turbo system designed for long-term durability.
His goal was not simply to build a showcase engine, although the crate engine serves that purpose. The larger idea was to create a turbocharging package that could be applied to the enormous population of existing small-block Chevrolets. In other words, the engine is an example of the system's capability, but the intended customer does not necessarily need to buy a complete engine. The turbo hardware is meant to let owners of existing small-block combinations reach serious power levels with a complete, engineered package.
Banks makes clear that very high-output turbocharging still requires the right internal engine parts. For a supercharged or turbocharged engine, he says the foundation must be rugged from the start. That includes a camshaft designed specifically for turbocharging and piston design suited to boosted operation. Compression ratio must be lower than in a naturally aspirated high-compression build.
The piston used in this engine is described as a Banks blower piston with a reverse deflector. Instead of a pop-up dome in the quench area, the piston crown is configured down in the bore to help reduce detonation tendency. Banks also mentions combustion-chamber preparation, specifically polishing the chamber to remove hot spots that could trigger detonation. The overall message is that while boost can make large power, durability and detonation resistance depend on matching the internal engine design to the intended cylinder pressure and fuel.
For viewers who already have a healthy small-block and want boost rather than a complete engine, Banks describes the Sidewinder kit as a complete package. He emphasizes that the installer does not need a hardware store's worth of parts or machine-shop capability to put it on. According to the video, ordinary hand tools are sufficient.
One of the major engineering points in the kit is the exhaust manifold design. Instead of fabricated tubular manifolds, Banks uses left- and right-side manifolds cast from high-silicon ductile iron. He presents this as a solution to common aftermarket turbo problems such as cracking, turbo sagging, and blown gaskets associated with hand-built tubular exhaust manifolds. The system layout is also designed to fit 1955-and-up Chevrolet cars and trucks, broadening its usefulness across many small-block applications.
The installation begins with an important prerequisite: a good electronic fuel-injection system. The example engine uses an ACCEL DFI setup. Each exhaust manifold is bolted on with a heat shield placed between the manifold and the cylinder head. With the studs installed, the gaskets and spacer are dropped over the manifold flange, and the turbo assemblies are mounted so the turbine outlets face rearward.
Each turbocharger is said to flow enough air for 560 horsepower, which explains why the rotating assemblies may reach 100,000 rpm and why oil supply to the center section is critical. The oil-feed system starts with an elbow fitting, followed by a hard line leading to a T-fitting that supplies both turbochargers. A braided line then connects the system to the back of the block. Because the turbos also need oil return, the kit includes two bungs that are welded to the oil pan for drain-back, although the demonstration engine already has that provision handled.
The wastegate assembly is installed beneath each turbo on the manifold. A pressure chamber is then fitted, containing a shuttle valve that opens as manifold vacuum rises. Banks explains the function in practical terms: even when the throttle is lifted, boost has somewhere to go, the turbo remains spooled, and full boost is available again quickly on the next gear change. Boost tubes are then installed from the compressor outlets to the pressure-chamber inlets, and hard lines provide the boost reference signal needed for wastegate operation.
Before startup, the oiling system is primed to make sure the turbochargers are properly lubricated. With that done, the remaining hardware goes on: heat shields, exhaust pipes, the oxygen sensor, the distributor, and the wiring harness for the fuel-injection system. The radiator is then mounted to the engine stand and connected with water hoses so the engine can be run safely.
The video presents the completed assembly as something many enthusiasts could install at home in about a day. Banks adds an important distinction about power goals. A stock small-block can accept the Sidewinder kit if the target is around 600 horsepower. Reaching 1,100 horsepower or more, however, requires a purpose-built engine rather than a stock short-block. When the engine is fired, the result is presented as proof of concept for both the bolt-on kit and the complete twin-turbo crate engine.
The closing discussion ties the installation back to practical use. For maximum power, the engine needs a 3-inch exhaust system. Beyond that, the takeaway is that the twin-turbo approach offers a way to make very large horsepower and torque while reducing the parts-breaking tendencies often associated with less controlled power-adder combinations.
Whether the customer chooses to bolt the kit onto an existing small-block or install a complete twin-turbo crate engine, the engineering story remains the same: turbocharging can deliver more flywheel power than a belt-driven blower at the same boost, the wastegate gives precise control over boost and torque delivery, and the durability of the package depends on proper manifold design, oiling, fuel control, and-at the highest power levels-a boosted engine built specifically for the job.