3MZFE Customed TRD Supercharger Kit 300PS Tune

3MZ-FE Supercharged 300PS Tune!

A 1MZ-FE TRD Supercharger

Introduction to the 3MZ-FE and Forced Induction Potential

The Toyota 3MZ-FE is a 3.3-liter, 24-valve V6 introduced in the early 2000s, known for its smooth torque delivery, relatively light aluminum construction, and excellent reliability when maintained properly. Stock, it produces roughly 225–230 horsepower at the crank, offering a solid base for performance upgrades. While Toyota Racing Development (TRD) never officially offered a supercharger kit for the 3MZ, the Eaton M62 roots-type blower designed for the 1MZ-FE can be adapted with the right parts and tuning. This combination capitalizes on the 3MZ’s increased displacement and higher compression to produce strong gains without sacrificing street usability.

Core TRD Supercharger Kit Components

These are the essential pieces that TRD provided in its original kit:

Supercharger / intake manifold assembly (Eaton M62 roots-style blower integrated with manifold) 

Supercharger belt (specific OEM part number included in the TRD kit) 

Idler plate / pulley assembly used to provide proper belt tension and alignment 

Required Adaptations for 3MZ-FE Integration

Since the 3MZ-FE wasn't officially supported by Toyota with a direct TRD kit, you'll have to add or adapt several components:

Adapter/spacer for intake manifold (to match 1MZ ports or bolt patterns to the 3MZ may involve custom machining or fabricating)

Pulley and belt alignment kit (ensuring proper accessory drive belt fitment when installing in your specific vehicle)

Throttle body compatibility parts (retain drive-by-wire throttle—either via adapter or swap to compatible cable TB)

Vacuum routing and PCV/EGR bypass plumbing adjustments to work with the 3MZ system

Cold-air intake inlet or MAF housing adapter to mate with the supercharger inlet properly

Fueling & Tuning Essentials (Kit-Agnostic Add-Ons)

Even with the blower installed, you’ll need supporting fuel and ignition upgrades:

High-flow fuel pump, or upgraded injector strategy (larger injectors or auxiliary “7th injector” kit)

ECU tuning solution either a piggyback fuel/timing controller or a full standalone ECU capable of handling the new airflow and boost dynamics

Wideband O₂ sensor and gauge for monitoring air-fuel ratio under boost, plus boost gauge for safe tuning

Colder spark plugs (1–2 heat range steps) to reduce detonation risk

Cooling & Drive-Tran Support (Optional But Strongly Recommended)

To sustain power levels close to 300 hp safely:

Water/methanol injection or a custom air-to-water intercooler (since the TRD kit lacks an intercooler by default)

Transmission cooler (especially critical for automatic models) to keep transmission heat in check

Upgraded motor mounts or supporting hardware to manage added torque and prevent traction or driveline issues

Core of the Build: TRD Supercharger Adaptation

At the heart of this 300-horsepower setup is the TRD 1MZ-FE supercharger, a positive-displacement unit that delivers instant low-end and mid-range torque. Adapting it to the 3MZ requires intake manifold modifications or adapter plates to match port shapes and bolt patterns, as well as belt and pulley alignment adjustments. Retaining a factory-sized pulley keeps boost in the 4–6 psi range, which, combined with the 3MZ’s displacement, produces safe yet noticeable power gains. The blower’s compact design fits well in the engine bay, preserving factory accessories and maintaining a relatively OEM-plus appearance.

Supporting Airflow Upgrades

To fully utilize the extra airflow from the supercharger, the build includes a free-flow cold air intake, equal-length exhaust headers, and a 2.5-inch mandrel-bent exhaust with a high-flow catalytic converter. These components reduce intake restriction and exhaust backpressure, allowing the supercharged engine to breathe efficiently. Together, they not only improve peak horsepower but also sharpen throttle response and enhance the characteristic supercharged whine under acceleration.

Fueling and Ignition Enhancements

Increased airflow demands increased fueling, so a high-flow in-tank fuel pump and either slightly larger main injectors or a supplemental injector system are installed. This ensures proper air-fuel ratios under boost and helps prevent lean conditions that can damage the engine. One to two steps colder spark plugs are fitted to reduce the risk of detonation, and the ignition system is refreshed with quality coils or wires where applicable. These steps collectively provide a reliable foundation for consistent, safe power delivery.

ECU Tuning for Power and Safety

Even with the mechanical upgrades in place, the 3MZ-FE will not achieve its full potential without proper ECU calibration. A piggyback fuel and timing controller, or ideally a standalone ECU, allows precise adjustment of ignition timing and fueling to suit the added boost. For a 300-horsepower crank target, tuning is focused on keeping intake air temperatures in check, maintaining safe timing advance, and ensuring smooth part-throttle drivability. The goal is a balance between strong top-end pull and reliable daily-drivable manners.

Cooling and Drivetrain Considerations

Boost generates heat, so a large automatic transmission cooler (for auto-equipped cars) is installed to protect the gearbox from the added torque. While an intercooler is optional at this mild boost level, water/methanol injection is considered to further reduce intake air temperatures and add a margin of safety against detonation. With these supporting systems in place, the engine and drivetrain can handle the 300-horsepower load without undue strain, provided the components are in good condition before the upgrade.

Expected Performance and Driving Character

With the TRD supercharger, intake and exhaust upgrades, fueling improvements, and a quality tune, the 3MZ-FE reliably produces around 300 horsepower at the crank, translating to roughly 250–260 wheel horsepower. The result is a car that feels dramatically more responsive, with instant throttle response, stronger mid-range acceleration, and a more engaging driving experience. Importantly, this setup retains the smoothness and reliability that Toyota V6s are known for, making it an appealing choice for enthusiasts seeking a daily-drivable performance boost without resorting to high-boost, high-risk builds.

Every motor and transmission has a weakness. It is very important to address your motor and transmission for weaknesses before modifying them. 

Check with your local laws and regulations before modifying, swiping motors, and transmission..👈