What cc are RDX injectors?
The Honda RDX uses a 2.0-liter turbocharged inline-four engine. The exact injector cubic centimeters per minute (cc/min) rating is not published by Honda as a single figure for all model years. In practice, aftermarket and service literature commonly cite ranges around 310–380 cc/min for similar 2.0L turbo Honda engines, depending on fuel pressure and tuning.
Understanding injector size helps with diagnosing performance issues or planning upgrades, but the precise rating for your RDX depends on year, market, and any modifications. The following overview explains what those numbers mean and how to verify the correct spec for your vehicle.
RDX engine context
The RDX lineup, particularly from recent generations, uses a 2.0 L turbocharged inline-four with direct injection. This setup is designed for both efficiency and performance. Because it relies on direct injection, injector flow is calibrated to engine management, boost targets, and ECU tuning—factors that influence the cc/min rating used in stock and modified configurations.
Common injector size ranges you may encounter
Below are rough ranges you might see in aftermarket documentation and tuning communities. These reflect common sizes used on 2.0L turbo engines in Honda/Acura variants, including the RDX, but they are not official Honda specifications for every model year.
- About 310–330 cc/min: typical for moderate-performance, stock-like setups at standard fuel pressure.
- About 340–380 cc/min: common for higher-boost or tuned configurations, often with upgraded fuel systems or pressure adjustments.
- 400 cc/min and up: used in aggressive boost builds or high-performance tunes with higher fuel pressure and ECU calibration.
These ranges illustrate what you might encounter in the market; the exact number for a specific RDX depends on year, market, and any modifications. Always verify with the injector part number or factory data for your vehicle.
How to determine your exact injector cc for an RDX
To identify the precise injector size for your RDX, use the following steps:
- Identify your exact model year and engine code. The RDX commonly uses a 2.0L turbo engine, but details can vary by generation and market.
- Locate the injector part number from your service records or on the injectors themselves. Use this to look up the official cc/min rating in Honda’s parts catalog or a trusted database.
- Check the factory fuel rail pressure specification for your engine (DI systems have specific rail pressures that affect cc/min). This helps interpret the cc/min rating accurately.
- If you’re considering upgrades, consult a qualified tuner or parts supplier to select injectors rated for your target pressure and map, and plan ECU tuning accordingly.
Bottom line: the exact fuel injector cc rating for an RDX is not a single universal figure; it depends on year, market, and modifications. Use the injector part number and factory specifications to confirm the correct rating for your vehicle.
Summary
In short, RDX injectors do not have one universal published cc figure across all models. The engine is a 2.0-liter turbo, and injector sizes cited by enthusiasts typically fall in a broad range around 310–380 cc/min, depending on fuel pressure and tuning. To determine the precise rating for your car, check the injector part number, consult Honda’s official data, and account for any modifications or tuning. When in doubt, rely on manufacturer specifications or trusted service databases before making changes.
Who makes RDX injectors?
OEM (Denso) Acura RDX injectors.
What size are RDX injectors?
The standard fuel injectors for the Acura RDX are 410cc, a common upgrade for other Honda and Acura models like the RSX, TSX, and Civic Si. The part number for these injectors is 16450-RWC-A01.
- Flow rate: The injectors have a flow rate of 410 cubic centimeters per minute (cc) at 38 psi, offering more fuel flow and better atomization than previous models.
- Part number: The official part number is 16450-RWC-A01.
- Applications: While they are stock for the Acura RDX, they are also a popular upgrade for other vehicles, including the Acura RSX, TSX, and various Honda Civics.
- ECU tuning: When installing these injectors on a vehicle where they are an upgrade, it is crucial to retune the engine's control unit (ECU) to account for the new injector size and flow rate.
Is the Acura RDX direct injection?
is powered by a direct-injected VTEC® Turbo 2.0-liter engine, producing an impressive 272 horsepower and 280 lb-ft of torque.
How do you tell what cc your injectors are?
This info is usually found online from the part number or manufacturer spec sheet. Flow rate is typically measured in: cc/min (e.g., 440cc)
