Purpose of dump valve for turbocharged engine

What is commonly known as a dump valve, or blow-off valve, is a turbocharged engine pressure release system. It fits between the compressor outlet and the throttle, reducing compressor damage and reducing turbocharger and engine wear. Bypassing the compressed air with a closed throttle allows the compressed air to be recirculated or released into the atmosphere.

In order to install it, the vehicle must have a turbocharger or supercharger. Blow-off valve kits are available on many models such as Audi, Ford, Mitsubishi, Nissan, Subaru and Volkswagen. Automakers usually adapt this not only for emission purposes, but also for fuel economy and drivability.

Most people who install it in the aftermarket do it for a higher than standard boost level, for a better throttle response, and, of course, for a blow-off hiss or swoosh.

There are two specific brands of dump valves. Bailey Motorsport offers dump valves with a piston design. It has a fast reaction time, improved boost function, and works in cars with air flow meters.We sell either single pistons or twin pistons Bailey dump valve If you like noise. If you need a quieter boost, we offer a piston-type recirculation dump valve. Prices range from $ 83.00 to $ 118.00, depending on your style.

Forge Motorsport also offers a variety of dump valves. Forge claims that the design and manufacture of the valve is aimed at releasing 100% of the residual charge air into the atmosphere. They are equipped with single-piston and dual-piston valves and provide recirculation valves. Prices start at $ 138.00.

It can be adapted in several different modes. For example, a hose mount can be easily replaced if needed. Pipe mounts can also be used by welding the base between the compressor outlet and the throttle. Vehicle-specific flange adapters are also available.

Installation of dump valves is a personal preference. Some people, mostly car enthusiasts, love the hiss and swoosh that occur when air is released into the atmosphere. Others feel that there is no benefit to the performance of the vehicle, and after a while, the noise becomes annoying. Some maintenance is required. This is another painful place for those who don’t mind spending time inside, especially when they realize that there are few performance benefits.

The main purpose of installing it is to protect the turbocharger and so far it has not been shown to increase power. However, on some car models, the turbo keeps spinning with the throttle closed, especially when changing gears, so you’ll feel an immediate change in the car and the car’s “full boost” will be faster.