Aeromotive VaporWorx ReturnX Pulse Width Modulation Controller Kit - Single Pump - Supercharged

Boost-Referenced Single Pump PWM Fuel Pump Controller for Return-Type Supercharged Fuel Systems

The Aeromotive VaporWorx 66164 ReturnX Pulse Width Modulation Controller Kit brings boost-referenced fuel pump speed control to single pump return-type fuel systems on supercharged applications. The 66164 uses a standalone MAP sensor to read boost and vacuum in real time, scaling pump output voltage proportionally so the pump delivers the flow and pressure the engine actually needs at each operating point. At idle and cruise, the pump runs at reduced duty cycle, lowering fuel temperature and electrical load. Under boost, the controller ramps pump speed to meet the full demand of the supercharged application. The 10V to 22V operating range accommodates both standard 12V systems and elevated voltage configurations used in high-output builds.

Key Features

• Boost-referenced PWM control via standalone MAP sensor input
• Single pump return-type fuel system configuration
• 10V to 22V operating range for standard and elevated voltage pump applications
• Reduces pump heat, electrical load, and injector noise compared to continuous full-voltage operation
• MAP sensor and wiring harness included for complete installation
• Compatible with supercharged return-type systems across a wide range of platforms
• Compact controller for flexible engine bay or trunk mounting
• Designed and built by Aeromotive in partnership with VaporWorx

Specifications

What's Included

• 1x Aeromotive VaporWorx 66164 ReturnX PWM controller unit
• Standalone MAP sensor
• Wiring harness
• Mounting hardware
• Installation documentation

Frequently Asked Questions

The 66164 controls a single fuel pump, while the 66172 is configured for triple pump systems with staggered activation output. Both kits use the same ReturnX boost-referenced PWM strategy. The 66164 is the right choice for builds where a single high-flow pump provides sufficient flow, while the 66172 is intended for extreme horsepower applications requiring three pumps running simultaneously.

Yes. The ReturnX controller is compatible with in-tank pump modules and inline external pumps in return-type configurations. The controller connects to the pump's power circuit and manages output voltage via PWM. In-tank single pump setups are among the most common applications for the 66164.

The standalone MAP sensor connects to the intake manifold and measures manifold absolute pressure, which reflects both vacuum at idle and boost under load. The controller uses this signal to calculate current fuel demand and adjusts the pump's duty cycle accordingly. As boost pressure rises, pump duty cycle increases. During vacuum conditions at idle, the pump runs at a lower speed to reduce heat and electrical load.

Yes. The ReturnX controller works with any supercharger type including roots-style, twin-screw, and centrifugal blowers on return-type fuel systems. The MAP sensor reads boost regardless of the supercharger's design or airflow characteristics, making the 66164 broadly compatible across supercharged platform types.

The controller operates on an input range of 10V to 22V, and the PWM output scales within that range based on demand. In a standard 12V vehicle, maximum pump voltage under full boost approaches battery voltage. In elevated voltage configurations where the system is wired to support higher pump voltage for increased flow, the controller can pass up to 22V to the pump when demand requires it.

Yes. The VaporWorx ReturnX platform is specifically designed for street and performance driving where the engine operates across a wide range of loads and conditions. The boost-referenced control reduces pump speed during daily driving, lowering noise and heat, while ensuring full pump capacity is available immediately when boost builds. This makes it well-suited for street supercharged builds that also see occasional track use.

The kit includes the controller, MAP sensor, wiring harness, and mounting hardware. You will need a compatible single high-flow fuel pump appropriate for your horsepower level and fuel type. Additionally, standard installation tools and appropriate fusing for the power wiring are required. No other specialty components are needed beyond what is included in the 66164 kit and the fuel pump itself.

The ReturnX controller uses a fixed boost-referenced control curve designed for supercharged return-type systems. Some VaporWorx controllers offer adjustability via trim potentiometers for idle and full-boost fuel pressure targets. Refer to the included installation documentation for any adjustment provisions specific to the 66164 and consult Aeromotive technical support if your application requires tuning beyond the default settings.

Installation Notes

1. Confirm your fuel system is a return-type configuration before installing the 66164 controller.
2. Mount the controller in a clean, dry location away from heat sources and fuel vapors.
3. Connect the MAP sensor to a manifold vacuum and boost port per the included instructions.
4. Connect the pump output wire from the controller to the fuel pump's power input using the provided harness.
5. Connect the power and ground wires to a switched 12V source and chassis ground with appropriate fusing.
6. Verify all connections against the wiring diagram before powering the system.
7. Check fuel pressure at idle and under boost conditions before sustained full-load use.

WARNING: This product can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and reproductive harm. For more information go to www.P65Warnings.ca.gov.