A waste gate is the main component of a turbo charger; it ensures that the motor does not get too much boost pressure while the turbo spools and revolutions per minute build up. It is an outlet that opens up to divert excess pressure from the turbo into an opening.
Internal Waste Gate
The internal type is usually found on cars with low boost settings around 5 to 6 pounds per square inch or at the most up to 10 psi. It is in the turbo housing and is a crucial part of the turbo itself. The diaphragm is linked with a hose that connects with the turbo charger, pipes and compressor outlet. When the diaphragm is activated, the gate is opened. When boost pressure goes beyond an expected amount, the diaphragm opens the spring loaded waste gate bypass flap which lets some of the accumulated pressure out around the turbo's impeller, which slows it down.
External Waste Gate
This is standalone from the turbo housing. It doesn't require extras like an actuator to function or operate. This waste gate is activated by a valve similar to the one used in a classic cylinder head. Excess exhaust is diverted from the turbo to the exhaust or directly into the environment. This is called divorced waste gate and is much louder than one that diverts directly to the exhaust.
Internal or External: Better option?
Most turbos use the external type as it works better for set ups that generate 20 pounds per square inchi to 30 psi. As there are no space constraints, this type of waste gate can be a lot larger and can control boost levels better.
- Photo Credit turbo image by Elijahu from Fotolia.com
What Is Twin Turbo?
A Turbocharged vehicle converts thermal energy that would be lost in exhaust into engine power. This process can be complicated by an...
What Is a Turbo Downpipe?
A turbo downpipe is the necessary exhaust pipe attached to a turbocharger.
How a Turbo Bypass Valve Works
A turbo, or turbocharger, refers to a gas compressor device designed to increase the air pressure that enters an internal combustion engine,...
What Happens When the Wastegate Is Not Opening on the Turbo Diesel?
Most diesel engines used today have a turbocharger and a wastegate. If you're looking to keep your engine in top condition, you'll...
How Can You Manually Increase the Turbo Boost on a VW?
Perhaps the world's most prevalent manufacturer of turbo-charged vehicles, automotive giant Volkswagen is a huge backer of the technology, offering it on...
How to Adjust the External Wastegate on a Turbo
An engine turbo charger produces extra horsepower and performance in an automobile engine. It does this by pressurizing the intake air before...
External Wastegate Installation Instructions
Wastegates regulate boost in turbocharged engines, an important safety function to prevent overboosting and potential engine damage. There are two kinds of...
Signs & Symptoms of a Faulty Wastegate
A wastegate is a device mounted internally or external to a vehicle's turbocharger that ensures the turbocharger does not produce more boost...
How Do You Install a Wastegate on a Turbo Manifold?
External wastegates are an investment that many turbo enthusiasts run to help control boost and tuning better than a stock internal wastegates...