TurbopacTM 2500 Series

(For use worldwide, subject to country codes and local regulations. In the U.S.A. for heavy-duty mechanical unit injection engine applications and for off-road use to and including model year 1994. For other applications or model years please contact Turbodyne Sales.)
Turbodyne's TurbopacTM system is an electrically powered supercharger that monitors the demand for power and delivers instant boost to the engine during transient engine operation.

TurbopacTM 2500 Series can be optimized for applications for a variety of system voltages, pressures, flows and duty cycles.

Turbodyne's TurbopacTM product line is designed to meet the demanding operating environment of heavy-duty, as well as medium-duty diesel engines. TurbopacTM systems have shown substantial pollution reduction capability for satisfying stringent environmental laws in the USA and abroad. TurbopacTM 2500 model is being used for the EPA Urban Bus Retrofit Program.

  • Improves Overall Performance (Torque & Horse-Power)
  • Improves Driveability (Acceleration)
  • Eliminates Turbolag (On Turbocharged Engines)
  • Lowers Emissions
  • Optimizes Fuel/Air Ratio & Can Improve Fuel Economy
  • Improves Opacity (Reduces Visible Smoke)
  • Consistant Performer with Long Life (Minimal Degradation)
  • Is A Simple Add-On

TurbopacTM Operation

Technically referred to as an "Electronic Demand Charger" (EDC), TurbopacTM is an electronic supercharger that uses electrical power for short periods of time for initial acceleration, passing and hill climbing. TurbopacTM is capable of significantly increasing power output of engines during acceleration.

TurbopacTM will engage and supercharge the engine via an activation signal from a throttle position via potentiometer or a pressure switch. It will switch off automatically as the manifold pressure reaches 8 PSI and the engine load is stabilized to avoid excessive demand on the vehicle's electrical system and reactivated when demand for increased power is made.

A solid state sealed motor controller is connected to the vehicle's battery system. The controller provides 3-phase current to a Permanent Magnet Brushless DC motor. The motor is directly coupled to the compressor which spools up to operating speed in a fraction of a second.

A Y-shaped check valve is connected to the intake manifold to provide boost pressure. Ambient air is supplied via a connection to the air filter. An activation circuit senses change in throttle pedal angle on diesel engines and manifold vacuum on gasoline engines.

When the TurbopacTM system is applied, more oxygen is available for optimized combustion during the otherwise fuel rich operating period, resulting in reduced emissions (PM, CO, HC, and smoke). The intake air is pressurized and the supercharged air is fed directly into the engine.

Unlike catalytic convertor and trap technologies, TurbopacTM systems do not exhibit engine performance degradation in the form of reduced performance due to the accumulation of soot, and therefore exhibit longer life.

Electrical Requirements

The standard vehicle alternator and battery are generally adequate for operation of the TurbopacTM. Power requirements of the TurbopacTM depends on the size of the engine and therefore quantity and mass flow of air. A larger engine takes more air and therefore more electrical power is needed for a given boost pressure. As an approximation, for any given engine, TurbopacTM draws about 25% of the electrical current of a starter motor for the same engine, but only for short bursts of several seconds.


The TurbopacTM System modular design can be applied in various configurations and TurbopacTM can be applied to a variety of diesel, gasoline, natural gas, other alternative fuel engines and naturally aspirated and turbo-charged engines.

The TurbopacTM System includes all of the required functioning hardware. It does not include the hardware required for a specific engine/vehicle installation. The customer or installer must provide the required brackets, hoses, clamps, nuts and bolts to complete the installation.

The standard functional TurbopacTM 2500 System consists of:

TurbopacTM Compressor Unit; Solid State Electronic Controller; Throttle Position Sensor or a Pressure Switch; Wiring Harness; Y-Shaped Pipe; Check Valve; Fuse and Holder; 8 PSI Pressure Switch. An Installation and Operation Manual is included.

The TurbopacTM compressor unit is installed in the engine compartment and is placed between the air intake of the engine and the intake manifold. The controller can be installed inside or outside the engine compartment.

TurbopacTM is a "stand alone" system that has no engine driven belts or gears, requires no lubrication and is manufactured with pre-lubricated precision ball bearings.

TurbopacTM is an electrically operated air enhancement device and its incorporation into an engine may require modifications to the fuel, ignition and electronic control systems of an engine. Modifications should be done by expert installers.

Installation of a TurbopacTM may interfere with the performance of anti-pollution devices. Please consult with Turbodyne Engineering for availability of exemptions on various engine types.

A Typical Performance Curve


Nominal System Voltage 12.5 or 24.5 Volts DC
Operating Temperature for Controller -40 C - +85 C, Motor/Compressor Assembly to 100 C
Environmentally Sealed Controller Unit. The Controller can be mounted in any direction.
Compressor is driven by a Permanent Magnet Brushless DC Motor powered by 3-Phase Input from Turbodyne's Solid State Controller
TP2500 Controller     12 Volt DC Input, 12 Volt 3-Phase Output
TP2500 Controller     24 Volt DC Input, 24 Volt 3-Phase Ouput
Compressor Wheel Diameter 3.8"
Fuse Protection Between Positive Battery Terminal and Controller
Tested to SAE J1455 Vibration Levels

Nominal Values:

Turbopac M/N Controller M/N Engine Size (liter) Boost (psi) Flow (cfm) Motor Nominal Voltage Controller Input Volts Amps
TP2500-12 2500-12 7 - 15 3.5 100 12.5 12 +/- 2 270
TP2500-24 2500-24 7 - 15 5.6 100 24.5 24 +/- 2 200

Note: Production testing is performed on each system.

Turbodyne reserves the right to make changes at any time without notice to any specification, price or information contained herein. The manufacturer makes no warranties as to merchantability or fitness for a particular purpose, either express or implied, other than those set forth in our written limited warranty. The manufacturer assumes no liability whatsoever for unintended uses for its product. Contact Turbodyne Sales and Marketing for complete up to date information on available equipment and specifications @ 6551 Carpinteria Avenue, Carpinteria, CA 93013