How To Choose The Right Turbo For Your Car?

How To Choose The Right Turbo For Your Car

Selecting the proper turbocharger for your engine involves many considerations. Not only are the facts about your specific engine necessary, but equally important is the intended use for that engine. The most important approach to these considerations is a realistic mindset.

Choosing a performance turbocharger starts with a horsepower target. Each turbocharger is designed to support a specific range of horsepower and engine displacement. If a turbo is too large for your engine, you will have a lot of turbo lag, and if a turbo is too small for your engine you may not reach your horsepower target.

In other words, if you’re turbocharging an engine that is presently rated at 400 hp in its naturally aspirated form, you’d probably love to have it produce 600 hp. If you’re looking for a nice power increase for all-around street driving, a 50-percent increase is more realistic, and matching a turbo to this level of increase will produce more satisfactory results. 

If you are searching cost-effective turbocharger system for your vehicle? MaXpeedingRods GT3582 aftermarket replacement turbo provides the perfect solution by delivering a high-quality turbo at a budget-friendly price. The GT3582 is fit for any four or six-cylinder engine, as well as 2.5L-6.0L engines, and it is capable of boosting up to 600 HP.

One of the most important factors in determining which turbocharger is most appropriate is to have your target horsepower in mind. But you have to be realistic about what you’re shooting for.

How to Choose the Right Turbo?

A turbocharger is a turbine that uses your engine’s exhaust gasses to compress and force air into the combustion chamber. The more air in the cylinder means more fuel can also get added.

The more fuel and air in the cylinder mean the bigger combustion and the more power produced. This significantly improves your vehicle’s weight to power ratio.

Turbo can be used for more than just increasing the horsepower of your vehicle through. Vehicle manufacturers use a turbo on a smaller engine to improve the fuel economy of a car without losing power.

A smaller engine is going to be more fuel-efficient than a larger engine. The added turbo allows the smaller engine to produce the same amount of power as a larger engine.

Set a Realistic Goal

If your engine currently produces 400 horsepower, you would probably love to boost it to 600 horsepower, its a realistic expectation. 

But, if your engine currently produces 200 horsepower, you would probably love to boost it to 600 horsepower. However, this is a bit unrealistic.

You can realistically expect to get around 50% more horsepower by adding a turbo to your engine. While you could get the 300% increase of 200Hp to 600Hp, you would need a lot more modifications than a turbo. You would also need to fine-tune all of the modifications so they work together.

Choose the Right One

To choose the right turbo, start by deciding what your goal horsepower range is. Be realistic about this goal. It is a terrible idea to buy the biggest turbo you can find blindly.

To figure out your ideal goal horsepower range consider these factors:

  • What is your car primarily used for?
  • How much traction can you achieve?
  • What can your engine and driveline handle?

There are turbos designed to achieve different goals. Some will improve your engine response time. Others will increase the economy. Then some turbos are purely for producing outright performance.

Do Some Calculations

You can use an online calculator or do some manual math. You need to calculate the amount of air your engine uses at a particular boost pressure. Start by finding out these figures:

  • Engine RPM
  • Engine size
  • Volumetric efficiency
  • Boost pressure

What you will end up with is a pressure ratio and three figures pertaining to the amount of air.

  • Amount of air in CFM
  • Amount of air in lbs./min
  • Amount of air in m3/min

These are the revolutions per minute of the crankshaft that connects to the piston rods. This tells you how many times the pistons go up and down in the cylinder.

This is a measurement that tells you the displacement of the engine. It is usually measured in liters or cubic centimeters. You can look up your engine size by your vehicle VIN number.

The VIN is a unique identifying number that is located on the bottom corner of your windshield. Count eight digits from the left and this are the code for your engine.

This measurement is the ratio of the mass density of the air and fuel mixture that goes into the cylinder and the mass density of that same volume of air going into the intake manifold.

What this ratio tells you is how efficient your engine is at moving the charge of fuel through the cylinders. Any flow restrictions in your intake system will cause the pressure to drop.

This reduces the density of the air going into the cylinder. The turbo you want to put on your car’s engine will combat this by forcing extra air into the chamber.

This is the increased positive pressure applied to your engine by a turbo. Larger turbos will produce more airflow. They do this at a lower boost level and have a longer lag time to performance.

Small turbos will have less lag time. But they will have to run a higher boost level to achieve the same airflow as the larger turbo.

Small Turbo vs. Large turbo: Which one do you choose?

It would be nice if turbocharging was like many other decisions where bigger is better, but not so.  While 90% of the internet would tell you to pick the smallest turbocharger that meets your horsepower goals, I would like to offer a different point of view after we go over the pros and cons of each.

Small turbochargers


  • Spool faster providing more torque lower in the powerband.
  • Easier install due to smaller dimensions.
  • Cheaper


  • Torque falls in the upper RPM of the power band.
  • Smaller turbine wheels cause more exhaust manifold pressure (EMAP) causing more cylinder reversion of exhaust gasses, raising cylinder temperatures causing the motor to become more prone to detonation and pre-ignition.
  • Don’t make as much power as larger turbochargers.
  • Torque usually comes on rapidly over a small rpm band causing traction problems.

Large Turbochargers


  • Usually, maintain torque all the way to redline.
  • Large turbine wheels allow good flow for better volumetric efficiency and less exhaust gas reversion, which helps in avoiding cylinder detonation and pre-ignition.
  • More progressive torque curve that comes online in a more progressive manner.


  • Leggy.  Meaning the time till the second boosted torque curve over the N/A torque curve takes time to obtain.
  • Physically larger, therefore can be harder to install in a given space.
  • Cost more than a smaller turbo.

Why does Turbo Matching Matter?

If you decide to choose a turbo outside of your engine’s efficiency range, you risk damaging your turbo and engine. While it is ok for a turbo to glow occasionally, you don’t want it to glow nonstop.

By forcing your turbo to run outside of its efficiency, you will cause it to burn out quickly. On top of that, you will force superheated air into your combustion chambers.

This is counterproductive to your efforts to increase horsepower, like that cold air intake you installed. It also puts you at risk of destroying your motor. The superheated air will require the intercooler to work harder.

If the intercooler can’t keep up, then the heat builds and destroys your motor. But if you decide that you have to boost your engine performance up to 600HP then the MaXpeedingRods GT3582 turbo is the best option for you!

Overview of GT3582 Turbo

The GT3582 turbo is a street anti-surge turbocharger with a T3 flange water-cooled billet compressor wheel. The GT3582 is fit for any four or six-cylinder engine, as well as 2.5L-6.0L engines. It is capable of boosting up to 600 horsepower.

The GT3582 turbo comes with the great build quality, The turbine housing is made of Silicon-Molybdenum, which has high temperatures resistance up to 850 degrees C. The steel turbine wheel is made from a special K419 alloy to achieve high oxidation resistance and stability under high temperatures up to 1000 degrees C. and, the cast aluminum blades provide good gas tightness and corrosion resistance.

What Size Is A GT3582 Turbo?

Compressor Size—-Turbine Size—-
* Trim:56.9* Trim:84.2
* Inducer Diameter:61.5mm* Inducer Diameter:68mm
* Exducer Diameter:81.5mm* Exducer Diameter:62.4 mm
* A/R:0.7* A/R:0.63
Compress Inlet Size4 inches (103.5mm)Oil Feed/Inlet    M10*7/16-24
Compressor Outlet Size2.5 inch (63.6mm)Oil Drain/Outlet2*M8*1.25
Maximum PSI22Water Inlet/OutletM14* 1.5

Benefits Of Using GT3582 Turbo

  • Increase 20-40% power for your car
  • Excellent high-temperature resistance
  • High efficiency and durability
  • Rich experience in turbo production and own factory
  • High-Speed oil seal ring and Precision clearance
  • 100% balancing Test by TURBO TECHNICS VSR3

Bottom Line

To sum up exactly what you need to know to choose a turbocharger that is right for you:

  • What vehicle is the turbocharger for?
  • What is the vehicle’s main use i.e., drag racing, rally events, day-to-day driving, etc.?
  • What power output do you want to achieve from your turbocharger?
  • What sort of budget have you got to play with to create your ultimate turbo?

Once you have found the answers to these questions you will be able to find exactly what you are after.

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