What does turbo surge sound like?

To the driver, compressor surge is apparent as a fluttering or repeated “choofing” sound, typically when closing the throttle.

What is turbo surge sound?

In simple words, a big mass of oscillating airflow can cause vibration of the turbo compressor impeller and its vanes, which make the compressor unable to operate normally, producing a high pitch noise as a reaction, which is known as compressor surge.

What causes turbo flutter sound?

Essentially, the noise is caused by what is known as "reversion". When a turbocharged vehicle builds up boost, and the driver backs off the throttle, the throttle body snaps shut, but the turbo is still spinning, trying to compress air.

What does turbo flutter sound like?

When people think of turbocharged cars, one of the first things that comes to mind is the sound of turbo flutter, that fluttering/chattering sound which happens when the driver backs off the throttle in a hurry, such as when changing gear.

What causes a compressor to surge?

Surge is a condition that occurs in compressors when the amount of gas they are trying to compress is insufficient for the size of the compressor and the blades lose their ability to transfer energy from the shaft to the fluid, causing a reverse flow of the gas.

The Truth About Compressor Surge

What makes Stututu sound in car?

When there is vacuum (no boost) in the intake manifold relative to the rest of the intake system, the BOV opens. It's the BOV that makes the signature turbo sound ("pssst"; "sutututu"), not the wastegate.

What does a dump valve sound like?

Aftermarket Dump Valves typically vent the pressurised air into the atmosphere for the purpose of making noise, and are characterised by the 'standard trumpet' sounds.

Do Wastegates make noise?

External Wastegates are responsible for turbo flutter.

That fluttering sound, which typically occurs when the throttle is suddenly closed, is the sound of the turbo trying to push air into the engine but failing, so the compressor blades 'chop' through the air. You can read more about this phenomenon here.

What does a normal turbo sound like?

As many fans of a turbocharged engine will know, a turbo often makes a whistling sound. This whistle is the sound of the turbo operating effectively, also known as 'spooling up'.

How do you fix a turbo flutter?

Conversely, if you're trying to eliminate turbo flutter, the best thing you can do is install a blow-off valve or replace yours if it isn't working correctly. Almost every vehicle with a turbo comes with a blow-off valve, and if it's working properly, you won't get any significant turbo flutter.

What does engine surge sound like?

Moreover, it's common for you to hear some noises coming from your engine during car surges. These noises usually sound like popping and backfiring. In some instances, your car's engine might simply sound different than usual.

Is surge bad for turbo?

Since the turbo is actually making significant boost, is at high RPM, and the pressure is fluctuating wildly because of the surge, these conditions do have the potential to cause greatly accelerated turbo bearing wear and/or damage to the compressor wheel.

Is turbo flutter surge?

Both turbo flutter and compressor surge occur when the air pressure after the turbo is higher than what the turbo can maintain. The difference is that compressor surge occurs while you're on the throttle and compressor blades in the turbo stalls.

What BOV makes the flutter sound?

In short, flutter is the sound of a turbocharger trying to push air. However, failing due to closed throttle. Therefore, it dramatically increases the load on the bearings of the turbo. If it occurs at higher engine loads or boost levels, it can cause premature wear to your turbo.

Does a BOV add HP?

The MS3's bov leaks at stock boost levels. Going aftermarket does not add any more power, but stops the loss of power due to the leak. This is not the case on our cars.

What the difference between a BOV and wastegate?

A blowoff valve (BOV) is similar to a wastegate, except it works on the intake side of the turbocharger. Once a certain level of pressure is reached, the inlet air opens a spring, allowing for the intake air downstream of the turbocharger to either vent to the atmosphere or be redirected back into the turbo.

Do turbos make noise?

All turbochargers make some amount of noise – and most people don't even notice it. However, if the whistling sound gets louder, more noticeable, or changes in any way, it could be symptomatic of a number of different problems, that all warrant further investigation.

What makes a turbo go Stustustu?

The turbine has exhaust gas that it's trying to use but can't. Since the gas can't go through the throttle, it exits the same way it came in. As it exits, the compressor blades chop through the air. This is what creates the famous “stu-stu-stu” noise.

Why does my car flutter when I accelerate?

Fluttering and bogging can be caused by a wide variety of issues. A few common causes are issues with the fuel, ignition, or engine management systems. If there is an issue with any of the components, such as the idle air control valve, the fuel pump, or an ignition coil, the engine may experience performance issues.

How do you detect a compressor surge?

As mentioned previously, compressor flow, discharge pressure, and inlet temperature are signals that can be used for surge detection. However, based on experience, suction pressure can also exhibit surge induced oscillations.

What happens when a compressor surges?

Surging can cause the compressor to overheat to the point at which the maximum allowable temperature of the unit is exceeded. Also, surging can cause damage to the thrust bearing due to the rotor shifting back and forth from the active to the inactive side. This is defined as the surge cycle of the compressor.

How do you stop a compressor surging?