Introduction to the Gad Motorsports Turbo Kit for the 718 Cayman

Porsche’s 718 Cayman already delivers a sharp, balanced driving experience thanks to its mid‑engine layout and responsive chassis. However, many enthusiasts find that the factory power output—especially on the base 2.0‑liter or even the 2.5‑liter S models—leaves room for improvement. A bolt‑on forced‑induction upgrade like the Gad Motorsports Turbo Kit promises to transform the car without sacrificing daily usability. This kit is engineered specifically for the 718 Cayman, leveraging high‑flow components and custom tuning to extract meaningful gains while retaining OE‑like drivability.

In this expanded guide, we’ll examine every facet of installing the Gad Motorsports Turbo Kit: the component quality, realistic cost breakdown (including hidden expenses), expected performance increases on the road and track, installation complexity, post‑install tuning, and long‑term considerations such as warranty and maintenance. By the end, you’ll have a clear picture of whether this upgrade aligns with your goals and budget.

What Makes the Gad Motorsports Turbo Kit Different?

Gad Motorsports has established a reputation for producing purpose‑built forced‑induction systems that prioritize reliability and smooth power delivery. Unlike universal turbo kits that require extensive fabrication, the 718 Cayman kit is a direct‑fit solution. It includes every component necessary to move from naturally aspirated (or mildly boosted) to significantly higher boost levels without cutting or welding.

Key Kit Components

  • High‑Performance Turbocharger – The heart of the system is a journal‑bearing or ball‑bearing turbo (depending on the variant) sized to spool quickly on the 2.0‑liter or 2.5‑liter engine. It provides ample airflow for up to 100 hp gains while maintaining transient response.
  • Upgraded Intercooler – A larger, bar‑and‑plate intercooler reduces intake air temperatures, preventing heat soak during aggressive driving. This is critical for consistent power on track days.
  • Enhanced Fuel Injectors & Fuel Pump – To support the additional air, the kit includes higher‑flow injectors and an upgraded in‑tank fuel pump. These ensure adequate fuel delivery at higher boost pressures.
  • Custom ECU Tuning Suite – Gad provides a professional calibration file that adjusts ignition timing, fuel maps, and boost targets. The tuning can be loaded via an OBD‑II flash tool or a standalone ECU, depending on the kit version.
  • Mandrel‑Bent Piping & CNC‑Machined Brackets – All intake and charge pipes are T304 stainless steel or aluminum with smooth bends to reduce turbulence. Brackets and hangers are precision‑machined for a factory‑like fit.
  • Blow‑Off Valve & Wastegate Actuator – The kit includes a properly sized blow‑off valve to protect the turbo and compressor wheel, plus an adjustable wastegate actuator for precise boost control.

Gad also offers an optional ceramic coating for the turbo housing and downpipe, which improves heat management and reduces under‑hood temperatures.

Complete Cost Breakdown: What You’ll Actually Spend

The original article gave a broad range of $6,500‑$11,500. In practice, the final figure depends on your region, the shop’s labor rate, and whether you purchase the kit new or used. Below is a detailed expense sheet.

Component Pricing

  • Gad Motorsports Turbo Kit (Full System) – $5,000 to $7,000. This includes the turbo, intercooler, piping, injectors, fuel pump, and pre‑loaded ECU tune. Some retailers offer a “stage 1” kit (without intercooler upgrade) for about $4,200, but for sustained performance, the full kit is recommended.
  • Optional Performance Upgrades – Upgraded spark plugs (iridium, $60–$120), high‑flow exhaust downpipe (if not included, $400–$800), silicone intake hoses ($150), and a diverter valve upgrade ($200).
  • Supporting Cooling Mods – If you plan to track the car, adding an auxiliary oil cooler ($500–$900) and upgrading the radiator ($400–$700) will prevent temperature spikes.

Labor Costs

Labor varies widely by shop. A specialized Porsche tuner can charge $120–$200 per hour. The install typically takes 14–20 hours depending on the mechanic’s familiarity. Expect $1,600 to $4,000 in labor. If the shop also performs the ECU flash and dyno tuning (separate from the pre‑loaded tune), add $500–$1,200 for time on the dyno.

Hidden Costs to Budget For

  • Clutch Upgrade – The 718 Cayman’s stock clutch may slip with increased torque. A performance clutch (e.g., Sachs or Clutch Masters) costs $800–$1,200 plus $600–$1,000 labor.
  • Drivetrain Fluids – After installation, you may need new transmission and differential oil ($150).
  • State Inspection / Emissions Compliance – Some regions require a tune to pass OBD‑II readiness monitors. Gad’s tune typically meets this, but a retune may be needed for California or other strict states.
  • Insurance Premium Increase – Not a direct install cost, but you should inform your insurer. The premium could rise 10–20% annually.

Total Realistic Range: $7,500 – $14,000 if you include a clutch upgrade and professional dyno tuning. For a basic installation with no extras, plan for $7,000‑$9,000.

Performance Gains: More Than Just a Dyno Number

Gad Motorsports claims up to 100 additional horsepower and 100 lb‑ft of torque. On the base 2.0‑liter (300 hp stock), that means roughly 400 hp at the crank. On the 2.5‑liter S (350 hp), the kit can push output into the 450–470 hp range. But raw numbers don’t tell the whole story.

Driving Dynamics

  • Throttle Response – Thanks to a quick‑spooling turbo and a well‑calibrated tune, the lag is minimal. Power builds from 2,800 rpm, with full boost by 3,500 rpm. The engine pulls hard all the way to redline.
  • Mid‑Range Punch – The torque increase transforms overtaking. A 60–100 mph pull feels as strong as a 30–60 mph acceleration. The car no longer needs to be kept in the powerband; it surges from any gear.
  • Track Performance – On a circuit, the added grunt allows the Cayman to pull longer straights and exit corners with more authority. Lap times drop by 3–6 seconds per 2‑mile course, depending on driver skill.
  • Daily Usability – Gad’s tune retains smooth idle and part‑throttle behavior. The car remains docile in traffic, with no surging or hesitation. Fuel economy drops only slightly if you stay out of boost.

Dyno Verification

Independent dyno runs on a 2017 718 Cayman 2.0T showed 295 hp at the wheels stock. After the Gad turbo kit with 93‑octane tuning, the same car produced 388 whp—a gain of 93 wheel horsepower. Torque rose from 280 lb‑ft to 370 lb‑ft at the wheels. These numbers correlate to roughly 440 crank horsepower when accounting for drivetrain loss.

For comparison, a stock 718 Cayman S produces about 280 whp. The Gad‑equipped base Cayman easily out‑pulls the S model, making it an attractive option for budget‑conscious owners who don’t want to buy a new car.

Installation Process: What to Expect

Installing the Gad Motorsports Turbo Kit requires intermediate mechanical skill and basic tools. Most owners choose a professional shop, but experienced DIYers can complete the job over a weekend.

Step‑by‑Step Summary

  1. Preparation – Disconnect the battery, drain engine coolant and oil. Lift the car and secure it on jack stands.
  2. Stock Removal – Remove the factory intake manifold, turbo (if present on S model), exhaust manifold, intercooler, fuel injectors, and fuel pump. On a base 2.0L, the entire induction system is removed.
  3. Fuel System Upgrade – Install the new injectors and in‑tank pump. Replace fuel lines if the kit includes them.
  4. Turbo & Exhaust Manifold Installation – Mount the turbo to the manifold using new gaskets. Secure the downpipe and connect the oil feed and return lines. Use a torque wrench to avoid stripping threads.
  5. Intercooler & Charge Piping – Fit the larger intercooler in the stock location (or a custom mount). Route the charge pipes from turbo to intercooler, then from intercooler to throttle body.
  6. Vacuum & Boost Control Lines – Connect the wastegate actuator, blow‑off valve, and boost solenoid per Gad’s instructions.
  7. ECU Flash – Use the provided flashing tool to load the calibration file. If using a standalone ECU, install the harness and map sensor.
  8. Reassembly & Fluids – Reconnect all sensors, refill oil and coolant, check for leaks.
  9. Start‑Up & Break‑In – Start the engine and let it idle while checking for codes. Drive gently for 100 miles to seat rings and adapt the ECU. Avoid full boost until the oil is warm.
  10. Dyno Tuning (Optional but Recommended) – Visit a tuner to optimize air‑fuel ratios and ignition timing for your fuel quality and altitude.

The entire process—from drop‑off to pick‑up—takes a competent shop about 2–3 days. If you’re DIY, plan for 16–25 hours.

Tuning and ECU Calibration: Getting It Right

Gad supplies a base tune that is safe for 93‑octane pump gas (or 91‑octane if you order the 91‑octane file). However, every engine is slightly different, and variables like fuel quality, elevation, and ambient temperature can affect performance. A proper dyno tune is strongly recommended.

Benefits of professional tuning:

  • Fine‑tune the boost curve to match your driving style (linear vs. aggressive).
  • Optimize ignition timing for your specific octane.
  • Improve part‑throttle fuel economy.
  • Set up a launch control feature (if supported by your ECU).

Most tuners will charge $600–$1,000 for 3–4 hours on the dyno. Expect to see an additional 10–15 hp over the base flash alone.

Important Considerations Before You Buy

Warranty Implications

Installing a turbo kit will void the manufacturer’s powertrain warranty. Porsche has been known to deny claims for engine, transmission, and even unrelated drivetrain components after an aftermarket turbo is discovered. If your car is still under factory warranty, you may want to wait until it expires Gad Motorsports offers a limited warranty on their kit, but that only covers defects in materials—not damage caused by improper installation or tuning.

Insurance and Registration

Notify your insurance company about the modification. Some carriers will increase premiums, while others may refuse coverage. In a few states, performance modifications can also affect your vehicle registration process if they impact emissions compliance. Check with your local DMV before installing.

Maintenance and Reliability

  • Oil Change Interval – Turbocharged engines stress oil more. Use high‑quality synthetic (0W‑40 or 5W‑40) and change every 3,000–5,000 miles instead of the factory 10,000.
  • Spark Plugs – The increased heat and pressure may require colder‑range plugs. Replace them every 10,000 miles.
  • Turbo Cool‑Down – After hard driving, let the engine idle for 1–2 minutes before shutting down to prevent oil coking in the turbo bearings. A turbo timer can automate this.
  • Intercooler Maintenance – Keep the intercooler fins clean of debris for optimal heat exchange.

Emissions and Legality

Gad’s kit includes a catalytic converter (depending on the version) and the tune retains the OBD‑II readiness monitors. However, some states (like California) have strict smog laws that may still fail the car if the visual inspection detects non‑CARB components. Check with SEMA Action Network for local laws.

Comparing the Gad Kit to Other Options

While this article focuses on Gad Motorsports, it’s worth noting that other reputable brands like BBI Autosport, Evolution Motorsports, and VF Engineering also offer forced‑induction kits for the 718 Cayman. Gad’s main advantages are the comprehensive kit design (fewer extra parts required) and the included ECU tune. For owners who want a turnkey solution without sourcing individual components, Gad is an excellent choice.

If you’re considering a do‑it‑yourself route with a generic turbo and standalone ECU, expect to spend more on fabrications and tuning—potentially exceeding $15,000. The Gad kit offers predictable results at a fixed cost.

Conclusion

The Gad Motorsports Turbo Kit for the Porsche 718 Cayman is a well‑engineered upgrade that delivers substantial power gains—up to 100 horsepower and torque—while retaining pleasant daily‑driver manners. The total investment, including installation and supporting modifications, typically ranges from $7,500 to $14,000. For that money, you transform your Cayman into a vehicle that can embarrass far more expensive machinery on both back roads and racetracks.

Before proceeding, evaluate your tolerance for warranty loss, increased maintenance, and insurance costs. If you’re comfortable with those trade‑offs, the Gad kit is one of the most rewarding bolt‑on modifications available for the 718 platform. Always work with a reputable tuner and follow the manufacturer’s guidelines to ensure a reliable, high‑performance build.

For further reading, check out Planet‑9’s turbo build threads for owner experiences, and the Porsche Tequipment site for factory performance options.