How To Get More Boost Out Of A Turbo Diesel?

Here are the best techniques to make your engine work harder.

Upgrade the Air Intake

Improving the airflow to the engine is a surefire technique to boost a diesel vehicle’s performance. More air will reach the engine using an enhanced air flow kit, resulting in increased power.

In addition, the new airflow kit will pull air from outside the engine compartment, bringing colder air in. The amount of power produced by the engine will rise because cooler air is denser and holds more oxygen.

An enhanced air flow system can boost horsepower while also improving fuel economy.

Change or Reprogram the ECM

Engine performance is controlled by the Engine Control Module (ECM), which alters critical engine parameters such as the air-fuel mixture and maximum RPM.

You may easily change these settings by reprogramming or changing the ECM. This will allow the engine to create more horsepower and torque, which will increase performance.

ECM upgrades not only increase power, but they also help to increase diesel efficiency.

Using New Fuel Injectors

The next step is to upgrade the fuel injectors if you’ve improved the air flow to the engine and set up the ECM to produce additional power.

More fuel will reach the engine thanks to new fuel injectors, resulting in increased horsepower. Individual injector nozzles are found on most performance fuel injectors, which provide higher pressure and better atomize the fuel.


Adding extra power to diesel engines using a performance turbocharger is an excellent way to do it.

The turbo operates by pressurizing the air intake and forcing additional air into the engine. It is possible to generate more power while improving engine efficiency by using a turbo.

In comparison to a non-turbo engine, a stock turbo boosts air flow three to four times. A performance turbo, on the other hand, can improve airflow five to ten times more than a non-turbo engine, resulting in a bigger horsepower boost.

Performance Exhaust

You’ll need to update your exhaust system if you want to increase the engine horsepower.

Unlike factory exhaust systems, which are designed to reduce noise, a performance exhaust system will have a wider diameter and fewer bends, allowing for more exhaust flow.

A broader, straighter exhaust system will help reduce exhaust gas temperature and boost the engine’s horsepower and torque.

What is the maximum boost a turbo diesel engine can produce?

The Turbomudger serves as a very high-speed fan whenever an engine is overt turbo, adding additional air to the engine at a cheap cost. Modern diesel engines may achieve a boost pressure of 40 psi while still producing three times the power of typical aspirated engines.

What is the best way to create an automatic boost?

Brake boosting in an automatic is easier because you don’t have to worry about your manual clutch wearing out. You should first reach a steady speed of roughly 20 mph before softly applying the brake. Push the gas pedal all the way down once the brake is in position. A speed of 20 miles per hour may seem modest for a racing maneuver, yet it is ideal for the technique’s aims.

You must wait until you hear the turbocharger spooling while the gas pedal is depressed. You can release the brake and enjoy the burst of power and boost effect as you hear that spooling up. There will be a lot of engine noise, but the speed increase will be noticeable and immediate.

On a diesel, how does boost work?

It’s usual for people who aren’t familiar with diesel engines to wonder why or how they generate such large levels of torque. The torque-to-horsepower ratio of diesel engines is rarely less than 2:1, and in heavy-industry engine applications, ratios of 3:1 and even 4:1 are common. The ratio of gasoline engines to diesel engines is significantly closer to 1:1. Three factors contribute to the high torque produced by diesel engines: 1) the turbocharger’s boost, 2) the stroke, and 3) the cylinder pressure.

Production diesel engines currently receive 25 to 35 psi of boost direct from the factory. When compared to gasoline engines, 10 psi of boost is frequently considered excessive. The best thing about compressed intake air (also known as boost) in a diesel engine is that it reduces the engine’s pumping losses on the intake stroke while also increasing cylinder pressure on the power stroke (combustion).

Long stroke crankshafts, whether in a gasoline or diesel engine, have always been favourable to producing torque. But why is that? Consider it as though you’re loosening an exceedingly tight bolt with a long wrench rather than the shorter wrench that couldn’t get the job done in the first place. Isn’t it true that increased leverage allows you to apply more torque? Yes, you certainly can. In a long-stroke engine, the connecting rod may turn the crankshaft with higher leverage (as the piston descends during the power stroke), resulting in more torque.

The type of cylinder pressure that causes torque is formed during the power stroke, as you may have guessed. Increasing the pressure on top of the piston by lengthening the injection event that happens in the cylinder with an earlier start of injection (SOI). More torque is created when more pressure is applied to the top of the piston.

Is it possible for a diesel to have too much boost?

Increasing boost (to a reasonable degree) forces more air into the engine, allowing more fuel to be supplied to boost power. In general, adding more boost and having an engine tuned to suit will result in increased power. Excessive boost might result in turbo or engine failure.

Low turbo boost pressure is caused by a variety of factors.

Reduced turbo efficiency can be caused by a variety of factors. Early detection of the cause may result in harm prevention, but in many cases, the damage has already been done. Broken hoses, contamination build-up in the turbine or compressor areas, leaking seals, damaged shaft bearings, the wastegate sticking open or operating incorrectly, a leak in the intercooler, a blocked air filter, a damaged diesel particle filter, or a damaged catalytic converter are all possible causes of low boost pressure. Carbon can build up in variable geometry turbochargers, causing performance loss.

Choose from the following topics for additional assistance:

What causes turbo to overboost in the first place?

You may have heard the term “overboost” mentioned in automobile brochures and reviews in reference to turbocharged engines and wondered what it meant.

As more automobiles are provided with smaller turbocharged engines in order to fulfill pollution regulations, overboost is anticipated to become more widespread. The overboost function allows the turbocharger to blast additional air into the engine for a brief period of time, resulting in a power boost. When the car’s computer finds the correct parameters, it automatically activates and boosts performance for a few seconds, but merely to avoid excessive engine wear.

Why use turbochargers?

Car manufacturers have sought to boost fuel efficiency and lower emissions from their engines without sacrificing power, which has resulted in the march toward smaller engines with turbochargers.

Turbochargers work by pumping more air into an engine’s cylinders, allowing for more fuel to be burned than would otherwise be feasible, resulting in higher power. Turbochargers are driven by exhaust fumes from the engine rather than fuel, and are typically used to make smaller, lighter engines more powerful. When compared to a non-turbocharged engine producing the same power, their deployment usually results in greater efficiency.

Turbocharging offers both advantages and disadvantages. One of them is that pumping air into the engine increases internal pressure and temperature, putting extra stress on the engine’s components. Engineers must consider this when determining how much air the turbocharger should drive into the engine at once; too much and the engine will wear out prematurely, if not completely fail. If you apply too little pressure, you’ll miss out on the power that the turbocharger and engine can produce when working together.

Overboost explained

Incorporating an overboost option into a turbocharged vehicle is a tradeoff between engine protection and power output. When the turbocharger runs at a greater pressure (forces more air into the engine) than is sustainable on a continuous basis, this is known as overboost. Overboost is normally restricted to 10-20 seconds, with a power gain of roughly 10% on average during that time.

Overboost is not controlled by the driver; it occurs automatically when the automobile is in a specific gear at a specific rev level and the throttle is fully open. Overboost also has the advantage of supplying extra power in specific conditions, such as overtaking and exiting curves, without increasing a car’s official emissions or insurance rating, because the power is not always accessible.

Cars with overboost

For example, the Volkswagen Golf GTI Clubsport’s turbocharged 2.0-litre petrol engine includes an overboost option that elevates the engine’s power output to 286bhp from 261bhp for up to 10 seconds. The current Ford Fiesta ST has 180 horsepower, but with overboost, it can reach 197 horsepower. Overboost is also available in the contemporary Ford Focus RS and Hyundai i30 N engines.

The overboost function is useful for more than just performance cars. The top-of-the-line Volkswagen Amarok Aventura boasts a 255bhp 3.0-litre turbocharged diesel engine with overboost capability of 268bhp.

Will a two-step construct help?

There are two types of steps: two-step and three-step. It only has one goal: to make a lot of noise and move you forward as quickly as possible. There will be no dancing.

First and foremost, let’s go through the fundamentals. A stutterbox, sometimes known as a two-step, is a type of launch control. Two-step functions as a supplemental rev limiter. Two-step relies on your speed sensor to determine whether you’re going or not. When the clutch is depressed and you’re not moving, the motor can rev and hold at a lower set value. This puts strain on the engine and, if you’re using a turbo, builds a few pounds of boost as well. Three-step just adds another step (no joke) after you’ve already started moving. Three step is effectively a third rpm limiter that allows you to No Lift Shift. You can also hold boost between shifts with NLS.

So, if you’re at the dragstrip and you roll up and stage, you’ll be able to put the vehicle in gear, put your foot to the floor, and the two-step will hold whatever RPM you programmed it at. All you have to do now is put the clutch on the third yellow and launch like a rocket. This is where three-step comes into play; after blowing past first, you may comfortably powershift into second, third, and so on by keeping the pedal to the floor. You can develop boost not only at the staging line, but also between shifts, by using two and three-step.

Will a lack of oil result in a lack of boost?

Because you chose your car for its high-performance engine, it’s critical to figure out what’s causing it to underperform and discover the best solution to get it back in working order. There are a variety of reasons why your turbocharger may be malfunctioning. Some of the most prevalent causes of low turbo boost performance are listed below:

Low turbo boost pressure can be caused by a constricted exhaust caused by the turbo turbine being attached and obstructing it. As a result, the engine must push back against the exhaust with greater force, reducing the amount of energy that can be transferred from the cylinders for engine power when driving.

Oil is one of the most important fluids in your engine, as you surely know, in order for your European vehicle to run smoothly. If your turbocharger is deprived of oil, whether due to an oil leak or an obstruction between the turbo and the engine, it will not only perform poorly on the road, but it will also cause long-term and permanent damage.

The performance of your vehicle’s engine depends on consistent and strong air pressure. Check the turbo hoses for leaks or loose connections if you notice a difference in the way your engine delivers power to your drive).