Performance Controls & Valves Advantages
All of Turbonetics’ high performance wastegates are designed and tested to do one thing – control boost and flow large volumes of exhaust gases. Turbonetics gates feature investment cast stainless steel bases to handle high EGTs, precision machined parts, high temp. resistant diaphragms, computer modeled and flow tested inconel valve designs and v-band connections. These wastegates perform under pressure to protect your engine from overboosting as well as efficiently evacuating hot gases to lower back pressure when running wide open throttle.
The turbocharger is moving large amounts of air while under boost, and this pressure is being delivered to the engine while the throttle is depressed. As soon as the throttle is lifted, the butterfly closes in the throttle body, preventing the pressurized air from entering the intake manifold. That dense charge air now has nowhere to go. Because the engine is still moving exhaust gases and the inertia of the turbocharger is turning the turbine and compressor wheels, the air literally stacks up against the throttle blades. Pressure builds up within the system’s piping extremely quickly and once it reaches the compressor wheel, the air actually flows back out of the compressor inlet and limits the compressor from rotating.
Because of the air reversing direction, the pressure drops, allowing the wheel to spin and once again raise the pressure. This process of up and down pressure and air reversal is surge and the result is the fluttering/barking sound that comes from the turbo. Surge is very detrimental to the turbocharger, resulting in various stresses being placed on the unit. The compressor wheel has high loads placed on it as it tries to move against this wall of air and as high pressure air finds its way behind the compressor wheel. Compressor surge can result in the compressor wheel spinning on the shaft, shaft breakage, bearing wear and may potentially create contact between the wheels and housings. It is important to note that the true function of a CBV/BOV is to do just what the name implies; to bypass the air or move it from one location to another. In most instances by routing the bypassed air to the inlet of the turbo, throttle and boost response may become much higher.