Sometimes the sound that we hear may not be accurately represented in words. There are several "noises" when the car is accelerating.
1.
Low frequency sound from the engine which is normal with any cars when you step on the pedal to accelerate the car. With the Preve Turbo, the sound is just a bit louder, more diffused.
2.
High-pitch sound from the CVT which some people associate with the "aeroplane sound". Some people call it a whistling sound. The sound can be heard when the car is accelerating though is faint and not very loud, since the louder noise from the engine has masked this softer whistling sound from the CVT.
3. The infamous "woo woo sound" from the CVT. This sound varies with cars. The noise is softer in some cars, louder in some other cars. If you hear an abrnormal
[U]LOUD[/U] woo woo sound from the car, then it is likely that the transmission (or something else) is faulty.
As everyone's ears are different without any benchmark or comparison purposes, a perceived "loud" woo woo sound may be normal. In other words, the woo woo sound may be prominent and annoying, but it is not exactly loud. It is just that the person chooses to use the word "loud" to describe on the woo woo sound. Having said that, if one strongly feels that the woo woo sound is loud and abnormal, by all means get the car checked at the service centre. If the sound is abnormally loud, then chances are the transmission is defective.
In my case of a defective gearbox, the loud woo woo sound does not happen when the car is moving at moderate speeds, say 80km/h to 120km/h. The woo woo sound only happens at low speed 0 to 40 km/h and when the car is stationary at 0 km/h, and it is loud to the point that you will know that something is really wrong with the car (in my case the gearbox).
Quite accurate.
I do hear a whistling sound after 40 km/h which I thought was from the turbo. It is literally like someone placed a whistle on the front of the car while air glides through the whistle. I find it amusing. And I think to myself, I damn proud I got a Malaysian car. I save a ton of money since my requirements were more towards safety. And then I continue zooming all over the place cause the car is pretty powerful... Puts a smile on my face everytime!