It might be a leak or hole in vacuum hose. As you increase RPM by pushing the gas pedal, pressure builds in the hoses making a whistling sound (e.g., 65 mph, high idle). High pressure goes down when you release, and the sound goes away. Have someone hold the idle high so you can locate the leak. Also many high flow air intake systems and some stock air intakes make a whistling noise at higher engine speeds. This can be checked by slightly reving the engine while someone listens to the air intake. P.S. Check the breather hose to the PCV valve and the PCV valve itself. Is it stuck? does your engine have a turbo? a turbo working properly , whisltes. if no turbo, you have an air leak, most likely in intake manifold
major vacuum leak?
Your vehicle will go into high rpms and not move very much. Also clutch will start to "slip" as your driving it will just start to rev high.
A defective vacuum line can cause a whistling sound when the vehicle is accelerating. A loose belt can also create a high pitched whistle sound.
lower rpms use less gas higher rpms have more power
Boat engines are built to hold high rpms (revolutions per minute) for long periods of time. Vehicle engines are not built for high rps or most of the anyways. Vehicle engines also have more torque the marine engine.
whistle :-)
A whistle typically produces a high-pitched sound, while thunder is a deep rumbling noise.
A whistle makes a high sound because of the short length of the whistle's tube, which amplifies high-frequency sounds. When air is blown into the whistle and vibrates at a high frequency, it produces a high-pitched sound.
A whistle is a High Pitch because its really loud and not really low.
Driving with high RPMs (revolutions per minute) can lead to increased engine wear and tear, as the engine operates at a higher stress level. This can result in overheating and potential damage to engine components over time. Additionally, it often leads to decreased fuel efficiency and increased emissions. It's important to shift gears at appropriate RPMs to maintain optimal performance and longevity of the vehicle.
A seven letter word that means a high shrill sound would be "whistle".
If you do not reach the read zone in your RPM scale, you are fine. Just make sure that you are using a good coolant and thermostat. I would even use low opening temperature thermostat if you like to drive with high RPMs often.