The turbo has a similar effect on exhaust systems, where the exhaust-side impeller disrupts the exhaust flow by creating an extra gate for the sound to have to flow through. Much like the effect on the intake, this results in a flatter, more sinusoidal tone to the exhaust, which most people would say is less exciting than an NA engine of similar design.
The turbo also tends to make the exhaust quieter as a byproduct. As turbo systems continue to become more and more efficient, the quieter, tamer, and less exciting the average car becomes. On the one hand, I think this is fantastic for urban areas with high noise pollution problems, and quieter engines and even electrics solve a lot of issues. On the other, though, it becomes tough to make sporty cars feel sporty, and doubly so for race cars.
There are a couple other parts of turbo technology I should mention before wrapping up. Within the turbo system there are typically two parts that generate sound; the wastegate and the blow-off valve.
The wastegate functions as a flow regulator for the exhaust side of the system by offering a bypass route around the turbo when certain pressure is met. The blow-off valve, on the other hand, works on the intake side of the turbo. The BOV is usually placed as close to the throttle as possible, and works to relieve pressure when the system is in boost and the throttle closes. Note that not all cars have blow-off valves, particularly race cars where the engine is rebuilt anyway so turbo damage is not high concern.
But as the auto industry moves further down the turbocharged route, our automotive soundscape is definitely going to be affected by it. Broadcast media is also re-learning how to showcase quieter race cars, as the Formula 1 broadcasters determine how best to showcase the new engines. All of these changes apply even stronger as electric car technology becomes more commonplace, where nearly all of the sounds we associate with a car are gone.
That was a great article. At AET, our teams are experts in diagnosing noises and fixing faults on a comprehensive range of turbochargers fitted to all kinds of passenger and commercial vehicles. We carry a massive range of new a reconditioned replacement turbos. For further information, call us today on , or email info aet-turbos. T F E info aet-turbos. Your privacy is very important to us. We'll look after your data and will never pass it to anyone else.
You can unsubscribe at any time. Ideal for performance situations when space is limited, such as boosted motorcycle or powersports applications. Race Port : our highest-flowing BOV. A pure high-performance motor sport Blow-Off Valve. Compact and very light weight. Big Bubba : Size matters! Designed for arge-capacity intake systems for both turbo and supercharged V8s, a modified turbo-diesel engines.
No, but that is an option if you prefer. If you prefer to keep it stealthy, a recirculating valve does the same job but is much quieter, and requires additional plumbing in the engine bay as it reintroduces the excess air in front of the turbocharger for re-use, and also minimizes the sound required to get the job done. These all lead you toward a repair or replacement bill for your turbo sooner than you would like.
Anything else is slowly but surely costing you money and performance. Every application is different. However, ideally Turbosmart recommends mounting the Blow-Off Valve after the intercooler and before — and as close as possible to — the throttle bod, because the airflow through the intake system continues to flow towards the intake manifold when the throttle is shut and the blow-off valve is venting, but when the throttle is reopened, air is still travelling in the same direction, meaning less energy and time before the turbocharger returns to operating speeds.
You can pick up a print copy or a digital copy of the magazine below:. Posted in Tech. View fullsize. Turbo basics: exhaust energy used to create positive airflow boost A turbocharger is an air pump, that is, it is a mechanical component that pushes air.
Do they need to be noisy? Installation guidelines Every application is different.
0コメント