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Increased Horsepower: How the Greddy Power Extreme Intercooler Boosts Your Q60 Red Sport by 40 HP
The Infiniti Q60 Red Sport is already a formidable machine, packing a twin-turbocharged 3.0L V6 that delivers 400 horsepower from the factory. But like any forced-induction engine, its performance is heavily influenced by intake air temperature. Once the stock intercooler becomes heat-soaked during aggressive driving, power drops, throttle response dulls, and the car fails to deliver its true potential. Enter the Greddy Power Extreme Intercooler — a direct-fit upgrade engineered to fight heat soak, reduce intake temperatures, and unlock a proven 40 horsepower gain at the wheels. This article breaks down exactly how this intercooler works, what makes it superior to the factory unit, and why it belongs at the top of your mod list.
Understanding Intercoolers and Heat Soak
Every twin-turbo engine compresses air, and compression creates heat. Hot air is less dense, meaning it carries fewer oxygen molecules per volume. The intercooler’s job is to cool that compressed air before it enters the combustion chamber, increasing air density and allowing the ECU to add more fuel and timing for more power. The stock intercooler on the Q60 Red Sport is a tube-and-fin design with modest core volume. It works fine for a few hard pulls, but under sustained boost — during a track session, a mountain pass, or repeated highway pulls — the core saturates with heat. Intake air temperatures (IATs) skyrocket, the ECU pulls timing, and the car loses 30–50 horsepower. That phenomenon is heat soak, and it is the primary reason upgrading to a larger, more efficient intercooler like the Greddy Power Extreme delivers such dramatic gains.
Why Upgrade to the Greddy Power Extreme Intercooler?
The Greddy Power Extreme intercooler is not simply a bigger copy of the OEM part. It is a complete redesign using a bar-and-plate core, significantly larger volume, and optimized end-tank geometry. Here is a detailed look at the key advantages:
Enhanced Cooling Efficiency
The core of the Greddy unit is substantially thicker and taller than the stock intercooler. Bar-and-plate construction provides superior heat transfer compared to tube-and-fin, especially in stop-and-go traffic or low-speed corners where airflow is limited. Testing by Greddy and independent owners shows IAT drops of 30–50°F during back-to-back pulls. Lower IATs directly translate to more consistent power and reduced risk of knock.
Increased Airflow with Lower Pressure Drop
Restrictive intercoolers create a pressure drop that robs the engine of boost. The Greddy Power Extreme features smooth, cast end-tanks and a larger frontal area that reduces restriction. This means the turbos do not have to work as hard to push air through the system, which can actually lower turbo outlet temperatures and improve spool. The net result is a system that flows more air with less backpressure, contributing directly to the claimed 40 HP gain.
Durability and Heat Management
Built from T6 aluminum and rated for extreme pressure, the Greddy intercooler is designed to withstand sustained track use. The thicker core also acts as a heat sink, absorbing short-duration heat spikes without immediately transferring them to the intake charge. This is particularly beneficial for cars running high boost supporting modifications like a tune, downpipes, or E85.
Direct Fitment for the Q60 Red Sport (VR30DDTT)
Greddy designed this intercooler specifically for the Infiniti Q60 Red Sport and the related VR30DDTT engine platform (also found in the Nissan Z and Q50 Red Sport). It bolts directly into the factory mounting points and uses the OEM charge pipes, requiring no cutting, drilling, or custom brackets. Installation time for a competent home mechanic is typically two to three hours.
Performance Gains: More Than Just Peak Horsepower
While the headline figure of 40 horsepower is attractive, the real-world driving improvements are even more meaningful. The Greddy power extreme intercooler delivers across multiple dimensions:
- Peak Horsepower: Dyno-verified gains of 35–45 wheel horsepower on a stock tune, with larger gains possible when combined with ECU tuning and other bolt-ons.
- Throttle Response: Because the intake air is consistently cooler and denser, the engine responds more crisply to throttle inputs. The lag between pedal movement and boost delivery is noticeably reduced.
- Consistency: Heat soak is the enemy of repeatable performance. With the Greddy intercooler, you can do multiple pulls without IATs climbing into timing-retard territory. Quarter-mile times remain consistent session after session.
- Reduced Knock Risk: Lower IATs mean lower combustion chamber temperatures. This reduces the likelihood of pre-ignition and knock, allowing the ECU to run more advanced timing safely. For cars running higher octane fuel or ethanol blends, the knock margin improves further.
Installation Details and Considerations
Installing the Greddy Power Extreme Intercooler is a straightforward job, but attention to detail matters. Here is a comprehensive step-by-step outline for DIY enthusiasts:
Tools Needed
- 8mm, 10mm, 12mm sockets
- Flathead and Phillips screwdrivers
- Torque wrench
- Trim removal tools (for pulling plastic covers)
- Jack and jack stands (optional but recommended for access)
Steps Overview
- Prepare the Vehicle: Allow the engine to cool completely. Disconnect the negative battery terminal. Remove the front under-tray and lower bumper cover to access the stock intercooler.
- Remove the Stock Intercooler: Unclip the charge pipe connections at both the turbo outlet and throttle body sides. Remove the two bolts securing the intercooler to the radiator core support. Slide the stock intercooler downward and out through the lower opening. Be careful not to damage the condenser fins.
- Install the Greddy Intercooler: Position the new intercooler in the factory location. Greddy’s intercooler uses the OEM mounting points, so it snaps into place. Secure with the provided bolts (torque to spec).
- Reconnect Charge Pipes: Slide the silicone couplers onto the factory hard pipes and the intercooler outlets. Tighten the T-bolt clamps evenly to avoid boost leaks. A torque wrench set to 5–7 Nm is ideal.
- Reassemble and Test: Reinstall the lower bumper, under-tray, and battery. Start the engine and check for leaks using a boost leak tester or listening for hissing sounds. A quick test drive with a scan tool can verify IAT reduction.
Note: The Greddy intercooler is designed to work with a stock tune. However, to maximize the 40 HP gain and safely exploit the lower IATs, a custom ECU tune from a reputable VR30 tuner is highly recommended. Tuned cars often see 60–80 wheel horsepower gains when pairing this intercooler with a full exhaust and E85.
Comparing the Greddy Power Extreme to Other Intercoolers
The Q60 Red Sport aftermarket is well-served by intercooler options from companies like AMS, Mishimoto, and Cobb. Here is how the Greddy stacks up:
| Feature | Stock | Greddy Power Extreme | AMS Competition |
|---|---|---|---|
| Core Type | Tube-and-fin | Bar-and-plate | Bar-and-plate |
| Core Volume | ~400 ci | ~700 ci | ~850 ci |
| IAT Drop (4th pull) | +20°F over ambient | +8°F over ambient | +5°F over ambient |
| Horsepower Gain (stock tune) | Baseline | 35–45 HP | 40–55 HP |
| Price Range | N/A | $700–900 | $1100–1300 |
For the price, the Greddy offers an excellent balance of cooling performance, build quality, and value. While the AMS unit edges it slightly in raw thermal capacity, the Greddy is more than enough for all but the highest-boost builds (800+ HP). For most enthusiasts running a tune and bolt-ons up to 550–600 HP, the Greddy Power Extreme is the sweet spot.
External Resources and Further Reading
To validate these claims and learn more, check out these resources:
- Greddy’s official product page for the VR30 Power Extreme Intercooler for specs and dyno charts.
- Discussion thread on Q60 Forums where owners share real-world IAT data and installation tips.
- A comprehensive guide on intercooler theory from a performance shop to understand why bar-and-plate trumps tube-and-fin.
Final Verdict: Is the Greddy Power Extreme Intercooler Worth It?
If you own a Q60 Red Sport and enjoy driving it hard — whether on a road course, drag strip, or mountain road — the stock intercooler is a bottleneck that leaves power on the table. The Greddy Power Extreme intercooler directly addresses the car’s biggest weakness: heat management. With a robust bar-and-plate core, easy installation, and proven gains of 40 horsepower, it is one of the highest-return upgrades you can make. It reduces IATs, stabilizes power delivery, and lays the foundation for further modifications. For under $900, the Greddy Power Extreme intercooler transforms your Q60 Red Sport from a hot-running luxury coupe into a consistent, track-ready performer. There are few mods that deliver this much improvement for this little money. It is a must-have.