What is the Stutututu sound?
The airflow to the intake manifold is low, but the air pressure from the turbo is high. Now this high air pressure should go somewhere, but there is no way to move forward. So this air pressure tries to escape back through the turbo. This process is called “Compressor surge” and we get this “stututututu” sound.
How bad is turbo flutter?
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.
What makes a turbo stutter?
It occurs when the intake air from the turbocharger doesn't have a place to go since the blow-off valve normally handles this. Without somewhere to go, the air goes back into the turbocharger, creating what is known as turbo flutter.
What causes turbo spool sound?
What causes turbo whistle? Turbo whistle is the sound of the compressor inside the turbocharger speeding up (also known as 'spooling up', which is why it kicks in at the boost threshold (when the turbo starts to kick in) as you accelerate up the rev range.
Is diesel turbo flutter bad?
After reaching maximum speed, a noise known as turbo flutter will result if you take your foot off the accelerator. The noise may be conspicuous, but it normally doesn't damage the engine.
How bad is turbo surge?
Surging is a disruption of the airflow within the turbocharger, where increased backpressure can create turbulence that prevents efficient running, with the potential to cause unwanted oscillations, vibrations and increased wear on the parts.
Does a wastegate make turbo flutter?
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.
Is turbo lag good?
Turbo lag is a normal hesitation when hitting the throttle on a turbocharged car. This delay is a small compromise when considering the significant power boost a turbo system provides. While there are ways to reduce turbo lag, these methods are generally best left to professionals and enthusiasts.
Is turbo flutter bad off throttle?
When the compressed air has nowhere to go, it causes the turbo rotational speed to rapidly drop, and attempts to push against the wheel. This can cause premature wear on your turbo, however closed throttle flutter on modern turbochargers is unlikely to cause a noticeable drop in turbocharger lifespan.
What is turbo choking?
Choking - Choking occurs when a turbocharger that is too small for the engine is used. The turbocharger will "choke" the engine, causing inefficiency, and in most cases, it causes turbocharger overboosting.
Why does turbo fail?
More than 90% of turbocharger failures are caused oil related either by oil starvation or oil contamination. Blocked or leaking pipes or lack of priming on fitting usually causes oil starvation. There are many types of contamination which may be carried by the engine oil into the turbo bearing system and cause damage.
Do turbos cause backfire?
The combustion gases keep the turbocharger spinning when the engine is not delivering enough exhaust gas. When you suddenly decelerate by closing the throttle unburnt fuel and air exhausts the cylinder and enters the exhaust duct. This unburnt fuel, when ignited by contact with hot surfaces, causes the backfire.
What does a healthy 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'.
Why do turbo engines whistle?
Here a whistle occurs when pressurizing, but also when decelerating. It is often due to a lack of lubrication of the turbocharger bearings. In this case, the deterioration of the turbo happens quickly and can lead to engine failure (the compressor fins break and pass into the combustion chambers).
What makes a turbo whistle?
If there's a leak or a loose connection in the vacuum hose connected to the wastegate or other components, it can result in inconsistent boost pressure and compromised turbocharger performance. This can lead to turbulence in the intake and exhaust systems, causing a distinct whistling sound.
How do I make my turbo flutter?
An absence of a blow-off valve, and sealing the opening where it was will create backpressure. This will make the turbo flutter.
Is a loud turbo bad?
One of the unexpected advantages of a turbocharger is that it actually makes the engine quieter because it muffles the sound of air intake. However, if you start to hear a loud, whining noise - a bit like a dentist's drill or police siren - it's a potential symptom of turbo failure.
Can small turbos flutter?
Can't you make smaller turbos flutter as much? The sound will differ depending on the engine, and all the intake pipework. It won't flutter as much in neutral because you need load on the engine to create the boost. Solid intake pipework will make the flutter much louder too.
Can a turbo spin backwards?
Reverse rotation, mirrored turbos, symmetrical turbos, mirror image turbos are the many names that identify this counter clockwise rotating turbo configuration.
Can over revving damage turbo?
Over speeding occurs when the turbo rotates at a greater speed than its operational limits. Over speeding can push a turbo beyond its safe operating parameters, causing it to fail by damaging the turbine or compressor wheels and bearings.
What is the average life of a turbo?
On average, turbos last up to 150,000 miles. But with good care, they may last up to 200,000 miles or have a life expectancy of 30 years. To get one thing clear, it will take you about two decades until you need to replace your turbocharger, even if you regularly drive your vehicle.
Can I run a turbo without a wastegate?
Do you need a wastegate on a turbo? A waste gate is needed if the turbocharger is capable of “overboosting ” the engine, meaning it can make so much pressure that the engine can be damaged.
Do wastegates add HP?
False. A wastegate is possibly the only component in your whole engine package that can actually be made smaller as you increase your boost/horsepower output – in certain circumstances. A wastegate is used to drive exhaust gasses away from the turbocharger to regulate turbine speeds and therefore boost pressure.
How do I make my turbo flutter louder?
Elevating the boost pressure into your engine makes the turbo spin harder, spool up, and make a louder sound. Boost pressure is known as the additional air that is forced into your engine. You can get this adjusted by managing the amount of exhaust gas flowing via your vehicle's turbo.
At what rpm is turbo activated?
A decent turbo hits full boost at 3k rpm, but it varies depending on the mechanical efficiency of the turbo and how much exhaust is being put out.
Do f1 cars have turbo lag?
Given the direct connection to the engine, a supercharger responds instantaneously to a driver's command for acceleration. That's not to say turbochargers are slow to react. There is, though, slight turbo lag, which can be frustrating for some drivers.
What is boost creep?
"Boost creep is a condition of rising boost levels past what the predetermined level has been set at. Boost creep is caused by a fully opened Wastegate(s) not being able to flow enough exhaust to bypass the housing via the Wastegate(s) itself.
Is it OK to go full throttle?
Periodic full throttle operation has a side benefit of helping to clear your engine's combustion chamber of carbon deposit buildup too, so you don't have to feel too badly about the occasional fuel “waste.”
Should turbo spin at idle?
Turbos spin whenever the engine is running, although not fast enough at Idle to produce enough air flow to be called as “boost”. There is also “turbo lag” when a slow turning turbo takes a moment to “spin up” and begin to produce enough boost to influence the engine into producing more POWER.
Is wastegate flutter bad?
All waste gates flutter like that. It is how they control boost. They are rapidly opening and then closing again, which diverts exhaust gases away from the turbine, to keep your boost at a specific target. As long as you are not over boost, or under boosting then don;t worry about it.
Is turbo a real thing?
That's where turbochargers come in, forcing more air into the engine than it could otherwise suck in on its own. Turbochargers provide such a boost in power that automakers are able to downsize engines—reducing displacement and in many cases the number of cylinders—while still making similar power.
What is a turbo wastegate?
A wastegate is a valve that controls the flow of exhaust gases to the turbine wheel in a turbocharged engine system. Diversion of exhaust gases regulates the turbine speed, which in turn regulates the rotating speed of the compressor.
What blows a turbo?
There're a number of things that can cause a blown turbo: Engine oil - your turbo needs oil to function properly. A lack of oil, the wrong grade of oil, or poor quality oil will lead to a build up of carbon deposits and contaminants in the engine, which can cause abrasive damage to the turbo.
Why not to buy turbo?
The downside is that some turbocharged engines hesitate before the turbo spools up and delivers a surge of power. Air is pulled into the turbo from outside the car. The spinning fan blades compress the air and force it into the system.
Why do BMW turbos fail?
The most common reasons why turbos fail are because of lack of oiling, not enough oiling. Turbochargers use engine oil for it's lubrication. The engine oils job is not just to lubricate, but it's also to cool the turbo.
Can remapping damage your turbo?
So long as you are using a professional to have your car remapped, it shouldn't damage your vehicle in any way.
Why do turbos smoke?
Turbos are generally cooled by oil. Turbo failure is normally due to oil seal failure causing overheating as well as allowing the oil into the cylinders. This can produce white smoke especially if there is also a leak of coolant into the oil.
Can a turbo catch fire?
Irrespective of whether the turbochargers are heat shielded, the turbocharger's surface temperature is hot enough to ignite fuel or oil when it comes into contact with it.
Why do powerful cars pop?
When an engine is running rich, it has too much fuel and too little air, which slows down the combustion process. When combustion doesn't happen in a timely manner, the exhaust valve opens while the air-fuel mixture is still igniting, causing this explosion to “spill” out of the cylinder, making a loud popping noise.
What makes a turbo go stututu?
The airflow to the intake manifold is low, but the air pressure from the turbo is high. Now this high air pressure should go somewhere, but there is no way to move forward. So this air pressure tries to escape back through the turbo. This process is called “Compressor surge” and we get this “stututututu” sound.
Why is my turbo hissing?
The sound of air hissing on a turbocharged engine is often down to a leak in the intake trunking that takes air from the turbocharger, through the intercooler and into the engine. As this air is under pressure (from the turbo) you're likely to hear it above the rest of the engine noise.
Do new turbos whistle?
If a new turbocharger attracts the driver's attention immediately after installation because of sounds such as whistling, rattling, or rasping, the defect can usually be found in the turbo's periphery.
How does a bad turbo sound?
If it is loose or damaged, it can allow exhaust gases to leak into the turbocharger, which can cause a whistling or whining noise.
Can a turbo be repaired?
What do you do if your turbo is blown? Once it has been determined that the turbo has blown, you have 2 options. Firstly, you can purchase a brand new turbo and have that fitted. Alternatively, if you wish to reduce the costs, it is possible to recondition and repair the turbo you have.
What makes a turbo louder?
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.
Is turbo whistle OK?
In theory, yes. If you remove the turbocharger, bolt a piece of pipe into the exhaust, close the turbine intake on the manifold, then yes, the engine would still run, but without producing much power because turbocharged engines usually have lower geometric compression.
Can a turbo engine run without the turbo?
It's the BOV that makes the signature turbo sound ("pssst"; "sutututu"), not the wastegate.
How do you reduce turbo lag?
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.
What type of turbo makes the Stututu?
Turbo flutter, or compressor surge, is caused by rapidly oscillating flow reversion through the compressor when the throttle is suddenly closed and the air has nowhere else to go. If you're not hearing it, it's because the blow off valve(s) and/or the engineered accoustics of the intake tract are preventing it.
Does a wastegate make turbo flutter?
It kind of depends on the car. Most factory cars have very subtle turbo sounds, and on some you can't hear them at all. Some people intentionally add bigger downpipes or different air-box/filter/intake setups to hear their turbos better. It's sort of a high whistle sound.
Why don t all turbos flutter?
Turbo failure can lead to a number of different problems, including a loss of power, excessive smoke or oil consumption, unusual noises, and reduced fuel efficiency. If the failure is not addressed, it can lead to more serious problems such as engine overheating or even a complete engine failure.
Should I hear the turbo?
Turbo flutter is the noise that occurs after you let go of the accelerator once you hit peak boost. It's caused by the airflow passing over the turbine blades in the turbocharger, which can be pretty loud. But is turbo flutter bad? It's usually not harmful to the engine, but the noise can disturb some.
Can a bad turbo destroy engine?
Important properties that play a part in such vibrations include mass, stiffness and damping. Repeating forces that can start additional vibration in your turbocharger include an imbalance in rotating parts, misalignment, worn machine parts, improperly driven machine components and pressure pulsation.
What is turbo flutter?
You'd have to do it QUITE a bit though, four revolutions shouldn't hurt it. The reason it CAN damage the engine is because you're forcing the internal mechanisms to run in the opposite direction they were engineered to turn.
Can a turbo vibrate?
Overspeeding is when the turbo rotates at a greater speed than its operational limits. Overspeeding can push the turbo beyond its safe operating parameters, causing it to fail by damaging the turbine or compressor wheels and bearings.
Why is it bad to spin an engine backwards?
Is it OK to rev in neutral?
Can a turbo spin too fast?
Is it OK to rev engine in park?
Where does the Stustustu sound come from?
How do you get the turbo flutter sound?
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.
What is a flutter sound?
An absence of a blow-off valve, and sealing the opening where it was will create backpressure. This will make the turbo flutter.
What is the wastegate flutter sound?
Irregularities that occur at higher frequencies are called flutter and cause a roughening of the tone: a piano sounds like a harp, and voices waver with small, rapid variations above and below proper pitch.