Exhaust Talk: 04 | Exhaust Valves Explained, How Do They Work, How Do They Change The Sound?
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- เผยแพร่เมื่อ 14 มี.ค. 2023
- Back with more answers to your common questions, in this episode we explore the functionality of exhaust valves, how they work, how valved exhausts are designed and what difference they make to the sound of your car.
In this educational series we will be answering your questions on everything exhaust related from resonators, to sports catalysts, to what is a legal exhaust modification for your car.
Remember to leave a like and comment on which topics you would like us to cover next.
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great explanation great help !!
Excellent very good
I have Ford Puma ST 2022. Stock exhaust, I unplugged the sensor a while back. Valve is open all the time. Sounds much better at all speeds.
Would this cause any long term issues? Or is the Valve purely for sound?
If you're removing a valve we always recommend this is either coded out or you attach a blanking plug to the cabling to protect the wiring connector. We've not come across issues with removing valves on our own vehicles as long as it is completed correctly.
What is the difference in decibels on that mini?
92.4dB at 4000RPM with the valve open and 88.1dB with the valve closed.
How to stock exhausts work ? Are valves only open at a certain RPM ? Is the only reasons valves are there is for emissions and noise pollution ?
Valves work in various ways depending on the specific vehicle. On certain cars they operate on a vacuum system which opens the valve depending on how far the accelerator is pressed, whereas on other models the valve may open if you switch from ‘Comfort’ to ‘Sport’ drive mode.
The purpose of the valves is to deliver a driving experience where you can enjoy a louder exhaust on a fun road, but when you are wanting to have a quieter note such as on a long journey the valve is then closed and the exhaust is quieter.
Good video BUT why the MUSIC???
We felt the video was a little flat without the music but perhaps the mix isn't quite right, feedback noted :)
Is this road legal? Will the car pass the MOT ?
The addition of an exhaust valve will not cause a car to fail an MOT and will still be road legal.