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The purpose of a wastegate for a turbocharged engine

A wastegate, or commonly known as an exhaust valve, is a pressure release system on turbocharged engines. It fits between the compressor outlet and the throttle and reduces wear on the turbocharger as well as the engine by relieving the damaging effects of the compressor. Allows compressed air to recirculate or vent to atmosphere by bypassing pressurized air with closed throttle.

To install it, the vehicle must have a turbocharger or supercharger. Exhaust valve kits are available for many models such as Audi, Ford, Mitsubishi, Nissan, Subaru and Volkswagen. Automakers typically tailor this for emissions purposes, as well as fuel economy and drivability.

Most people who install it aftermarket do so to get a higher boost level than stock, for better throttle response, and of course to make the exhaust hiss or hiss.

There are two specific brands of flush valves. Bailey Motorsport offers a piston design wastegate, which has faster reaction time, higher boost capacity and can work on cars with air flow meters. They sell the single-piston or dual-piston Bailey dump valve if you’re a noise lover. If you prefer a quieter drive, they offer the piston-type recirculation dump valve. Prices range from $83.00 to $118.00, depending on the style you prefer.

Forge Motorsport also offers a variety of dump valves. Forge maintains that its valves are designed and built with the intent to vent 100% of the residual charge air to atmosphere. They have single piston and double piston valves, in addition to offering a recirculation valve. Prices start at $138.00.

This can be equipped by several different modes. For example, a hose holder can be used, making it easy to replace, if necessary. A pipe mount can also be used by welding the base in position between the compressor outlet and the throttle. Vehicle specific flange adapters are also available.

Installing a dump valve is a personal preference. Some people, mainly car enthusiasts, love the hissing and hissing noise that occurs when air is released into the atmosphere. Others feel that there is no benefit to vehicle performance and after a while the noise becomes annoying. It does require a certain amount of maintenance, and this is another sore spot for some who don’t mind spending time under the hood, especially when they notice little performance benefit.

The main purpose of installing it is to protect the turbocharger and to date it has not been shown to increase power. However, on some car models, an immediate shift in the car can be felt, particularly when changing gears, due to the continuous spinning of the turbo under tight throttle conditions, allowing for a quicker “full boost” to the car. .

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