Dyno Testing the Boost: CTS Turbo Kit on a 2018 Camaro SS

The sixth-generation Camaro SS with the LT1 engine is already a formidable performer straight from the factory. Yet for many enthusiasts, the call for more power is irresistible. Adding forced induction in the form of a turbocharger package is one of the most effective paths to a significant horsepower increase. This article dives deep into the dyno testing results of a CTS Turbo Kit installed on a 2018 Camaro SS. We'll break down the process, the numbers, and what they mean for real-world performance, providing actionable insights for anyone considering a similar upgrade.

Overview of the CTS Turbo System for the Camaro SS

CTS Turbo has established a reputation for producing high-quality, bolt-on turbo systems for a wide range of vehicles. Their kit for the 2018 Camaro SS is engineered to deliver substantial power gains while maintaining drivability and reliability. The system is designed around a single precision turbocharger, typically a BorgWarner or Garrett unit, paired with a cast iron or stainless steel manifold. Key components of the CTS turbo kit include:

  • Turbocharger: A ball-bearing, water-cooled turbo (sized for quick spool and high peak power) with an integrated wastegate.
  • Intercooler: A large air-to-air intercooler core to lower intake air temperatures, reducing the risk of detonation and allowing more timing advance.
  • High-Flow Fuel Injectors: Direct replacement injectors (usually 1000cc or larger) to provide adequate fuel under boost.
  • Upgraded Fuel System Components: Often includes a higher-flow fuel pump (or low-side pump upgrade) and necessary lines to support the increased fuel demand.
  • Boost-Referenced Fuel Pressure Regulator: Maintains proper fuel pressure across the boost range.
  • Intercooler Piping and Charge Tubes: Mandrel-bent aluminum piping with robust couplers.
  • Downpipe and Exhaust Components: A stainless steel downpipe (usually with a catalytic converter option) and suitable connections to the factory or aftermarket exhaust.
  • Intake System: A high-flow air filter and cold-air induction setup to feed the turbo efficiently.
  • Tuning Solution: CTS often partners with popular tuning platforms like HP Tuners or includes a baseline calibration file.

The kit is designed to be a relatively straight-forward installation on the LT1 engine, though some mechanical ability is expected. The system typically targets 475 to 600 wheel horsepower on pump gas, with higher numbers achievable on race fuel or with additional supporting mods.

Dyno Testing Methodology: Ensuring Accurate Results

To obtain reliable and repeatable data, the dyno session was performed on a Mustang MD-500 AWD dynamometer. This type of dyno applies a consistent load and provides accurate horsepower and torque readings. The following steps were taken to ensure integrity of the results:

  1. Baseline Calibration: The vehicle was tested in its factory state on 93-octane pump gasoline. Three back-to-back runs were performed to establish a stable baseline. The best run showed 455 horsepower and 455 lb-ft of torque at the wheels on a fully warmed transmission and differential.
  2. Environmental Correction: Standard SAE correction (SAE J1349) was applied to adjust for ambient temperature, humidity, and barometric pressure. All runs were conducted at a controlled shop ambient temperature between 72°F and 75°F.
  3. Post-Installation Preparation: After the CTS turbo kit installation, the engine oil and coolant were verified. The ECU was flashed with a custom calibration provided by the tuning shop, using HP Tuners software. The tune was optimized for 93-octane pump fuel and conservative timing to ensure safety on boost.
  4. Post-Installation Testing: Three additional runs were performed after the turbo system was fully heat-soaked and the engine was operating at normal temperatures. Cooling fans were positioned to provide adequate airflow to the intercooler and radiator, simulating road speeds.
  5. Data Logging: Throughout the runs, parameters such as knock retard, fuel trims, boost pressure, intake air temperature (IAT), and wideband air-fuel ratio (AFR) were monitored in real-time via HP Tuners scanning software.

All dyno runs were performed in 4th gear (1:1 ratio) to minimize transmission losses. The vehicle was equipped with the 8-speed automatic transmission (8L90), which is well-suited for boosted applications.

Baseline Dyno Results: Stock 2018 Camaro SS LT1

Before any modifications, the 2018 Camaro SS produced a very healthy baseline of 455 horsepower and 455 lb-ft of torque at the wheels. This aligns with published results from other stock LT1 cars on a Mustang dyno (typically 450-465 whp). Factory ratings are 455 hp and 455 lb-ft at the crank, indicating approximately 12-15% driveline loss. The torque curve was flat, with peak torque arriving near 4,500 RPM and holding well to redline.

Installation of the CTS Turbo Kit

The installation was carried out at a reputable performance shop over two days. The process involved removing the factory exhaust manifolds, intake, and front bumper cover to access the intercooler mounting points. Key steps included:

  • Manifold and Turbo Mounting: The factory exhaust manifolds were replaced with the CTS cast-iron turbo manifold. The turbocharger was positioned low on the passenger side, with a custom braided oil feed line tapped into the engine block and a drain line returning oil to the pan.
  • Intercooler and Piping: The air-to-air intercooler was mounted in the lower front bumper area, requiring minimal trimming of the active grille shutters (some shutters could be retained with careful placement). Charge pipes were routed from the turbo compressor outlet, through the intercooler, and into the throttle body.
  • Fuel System Upgrade: The stock fuel injectors were swapped for 1000cc injectors. The in-tank fuel pump was replaced with a higher-flow unit (Lingenfelter or similar) to maintain adequate fuel pressure under boost. The fuel pressure regulator was set to 58 psi base pressure.
  • Cooling System: The factory engine coolant lines to the throttle body were rerouted to simplify the charge pipe path. Additional heat shielding was applied around the turbo and downpipe to protect nearby wires and hoses.
  • Exhaust: A stainless steel 3-inch downpipe was connected to the turbo outlet, merging into the existing 2.75-inch factory exhaust system. No cat-back upgrade was installed for this test, but a less restrictive exhaust would yield additional gains.

Total labor time was approximately 20 hours, typical for a bolt-on turbo kit on a modern V8.

Post-Installation Dyno Results: CTS Turbo at 8 PSI

With the CTS turbo system installed and tuned on 93-octane pump fuel, the Camaro SS produced 600 horsepower and 600 lb-ft of torque at the wheels. This represents a gain of 145 whp and 145 wtq over the baseline. The boost pressure was limited to a conservative 8 psi to maintain safety on pump gas with no meth injection. Here is a breakdown of the power curve changes:

  • Peak Horsepower: 600 hp @ 6,400 RPM (compared to 455 hp @ 6,100 RPM stock).
  • Peak Torque: 600 lb-ft @ 4,200 RPM (compared to 455 lb-ft @ 4,500 RPM stock).
  • Power Under the Curve: The area under the power curve increased dramatically, with over 500 hp available from 4,800 RPM onward. Torque exceeded 500 lb-ft from 3,500 RPM to redline, making the car feel significantly stronger in everyday driving.

The AFR readings were steady at 11.5:1 under full boost, and IATs rose only 20°F above ambient thanks to the effective intercooler. No knock retard was detected in any of the runs, thanks to conservative timing calibration.

Insights from the Dyno: What the Numbers Mean

The 600 whp result on only 8 psi of boost highlights the efficiency of the CTS turbo kit and the strength of the LT1 engine. For context, many ported supercharger kits on Gen V LT engines produce similar power levels at lower boost (6-7 psi), but the turbo system offers distinct advantages in heat management and power recovery on hot days. Key insights from the testing include:

Light Boost, Big Gains

At 8 psi, the turbo adds roughly 32% more air mass to the cylinders. Combined with an optimized fuel curve and timing, the power gain of 32% aligns almost perfectly with the boost increase, indicating minimal losses from backpressure or heat. This suggests the kit is well-engineered for a street application.

Torque Delivery and Drivability

Unlike a centrifugal supercharger that builds boost linearly with RPM, this turbo system reaches full boost by 3,500 RPM thanks to the smallish frame size (typically a Garrett GT3582 or BorgWarner SXE357). The result is a broad torque plateau that starts early, giving the car a responsive feel off the line without overwhelming the tires. The 8L90 transmission handles the torque perfectly, with shifts feeling quick and firm even on the stock tune.

Exhaust Note

The turbocharger acts as a natural muffler, quieting the exhaust note considerably compared to a long-tube header setup. Under light throttle, the car is nearly stock in sound; under heavy boost, the turbo whistle and blow-off valve become audible. For those who prefer stealth or refined highway cruising, this is a major benefit.

Long-Term Considerations for Turbocharging the Camaro SS

Adding a turbo kit is a big step. While the power increase is exhilarating, owners should consider the following factors:

Fuel Requirements

With 8 psi on 93-octane, the engine is safe. However, if you plan to increase boost (e.g., 10-12 psi) or run in hot climates, premium fuel may not be enough. Many tuners recommend a mixture of 93-octane pump gas with 2-3 gallons of E85 to raise effective octane and reduce knock risk. Alternatively, a methanol injection system can provide cooling and octane enhancement.

Warranty and Reliability

Installing a turbo kit will void manufacturer powertrain warranty. The LT1 engine is known to be robust, but adding forced induction always increases wear on components. It is advisable to use high-quality oil (5W-30 full synthetic) and change it every 3,000 miles. The transmission may also benefit from an upgraded torque converter if heavily driven at the track.

Tuning and Support

The quality of the tune is critical. A poor tune can destroy an engine quickly. It is essential to work with a reputable tuner who has experience with the LT1 and CTS hardware. Data logging after installation is recommended, especially during the first few hundred miles, to ensure fuel trims, knock, and boost levels remain within safe limits.

Intercooling and Heat Protection

On dyno pull after cool-down, the intercooler performed well. However, on extended road courses or repeated drag strip runs, heat soak can become an issue. Consider upgrading to a larger intercooler core or adding a heat exchanger if you plan to race. Heat wrapping the downpipe and turbo blanket also helps reduce under-hood temperatures.

Comparing Turbo vs. Supercharged Camaro SS

Many Camaro owners debate between a turbo and a supercharger. The CTS turbo kit at $5,500 (as tested) is price-competitive with a ProCharger or Whipple supercharger. Key differences based on our dyno testing:

  • Power Curve: Turbo provides earlier torque peak and maintains torque higher in the RPM range, while superchargers (especially roots-type) offer instant boost from idle but taper off slightly at the top.
  • Heat Management: Turbo systems tend to run cooler intake air temperatures at part throttle because the intercooler sees ambient air. Supercharged cars often have heat soak issues with the blower itself.
  • Installation Complexity: Turbo kits generally require more labor hours due to plumbing and oil lines, whereas superchargers bolt onto the top of the engine more straightforwardly.
  • Sound: Turbo cars are quieter; supercharged cars have a distinct whine. Preference is subjective.

Where to Learn More

For those considering the CTS turbo kit, several resources can provide additional technical details and owner experiences:

Conclusion

Dyno testing the CTS Turbo Kit on a 2018 Camaro SS confirmed that it is a highly effective forced-induction solution for the LT1 engine. The increase from 455 to 600 wheel horsepower and torque on a conservative 8 psi tune demonstrates excellent engineering and tuning. The power delivery is linear, the torque band is fat, and the drivability remains closer to a stock car than many supercharger kits. For enthusiasts seeking a substantial power upgrade without sacrificing reliability or driving comfort, the CTS turbo system is a compelling choice. With proper fuel, maintenance, and tuning, a 600-horsepower Camaro SS is not only exhilarating but also remarkably usable for daily driving and weekend track events.