What is a Turbocharger?
The rapid advancement of modern technology has brought numerous innovations to the automotive industry. Today, a powerful engine is one of the most sought-after features for driving enthusiasts. One of the most effective ways to achieve a significant increase in power and torque is by utilizing a turbocharging system.
The turbo unit functions as an air pump driven by the waste energy found in exhaust gases. It consists of a turbine wheel and a compressor wheel connected by a solid, high-speed shaft.
How Does a Turbocharger Work?
Exhaust Gas Flow: Pressurized exhaust gases exiting the engine are directed into the turbo’s turbine housing.
Shaft Rotation: The flow forces the turbine wheel to spin, rotating the shaft at extremely high speeds.
Air Compression: As the shaft spins, it drives the compressor wheel, which draws in a large volume of ambient air and compresses it.
Combustion Efficiency: The compressed air is forced into the engine’s cylinders. When mixed with fuel, the high oxygen density allows for a much more efficient and powerful combustion cycle.
How to Increase Turbo Boost Pressure
1. Upgrade the Intercooler Unit
One of the most effective ways to maximize and maintain turbo efficiency is by upgrading or optimizing the intercooler (charge air cooler).
The air leaving the turbocharger reaches temperatures of approximately 160 degrees Celsius. The intercooler cools this compressed air, increasing its density. Denser air packs more oxygen into the cylinders, which safely increases the potential boost and overall performance.
2. Inspect and Replace the Boost Solenoid
A common cause of low turbo boost pressure is a faulty or malfunctioning boost solenoid. These electromechanical valves act based on signals from the engine control unit (ECU) to regulate the pressure directed to the wastegate actuator.
When the solenoid fails, the system cannot regulate air pressure effectively, leading to under-boost. Replacing or upgrading the solenoid restores proper pressure control and responsiveness.
3. Check and Adjust the Wastegate Valve
The wastegate is the critical valve system that controls the amount of exhaust gas directed past the turbine wheel to regulate the maximum boost pressure.
In some stock configurations, exhaust gas diversion can cause subtle power losses near specific operating thresholds. Ensuring the wastegate operates smoothly without leakage is essential. Maintaining, adjusting, or upgrading the wastegate allows the turbo to hold higher and more stable boost pressures without dropping off.
4. Service the EGR Valve
A clogged or faulty Exhaust Gas Recirculation (EGR) valve significantly restricts engine airflow and drops turbo boost pressure.
The EGR system recirculates a portion of the exhaust gas back into the engine cylinders to lower combustion temperatures and meet emissions standards. Over time, heavy soot and carbon build up inside the valve, causing it to stick. Regular cleaning or proper deletion (if permitted by regional regulations) ensures optimal airflow and allows the turbo to generate maximum boost.
Elevate Your Engine Performance with North Tuned
At North Tuned, we specialize in precision ECU remapping, custom turbo setups, and high-performance exhaust management. Whether you need an optimized ECU calibration following a hardware upgrade or fine-tuned boost parameters for track performance, our expert engineering team delivers the highest standards of automotive tuning.