Pneumatic StraightGate50 (Vacuum-Based) 6 InHg External Wastegate (Black)

What is the first rule of boost control?
Ensure you have an over-boost cut-out. This is a safety feature built into basically all factory, aftermarket & programmable ECU’s. You can never bee too careful. Make sure it is set to a sensible& reasonable limit. Increasing the boost will put more load on your engine and there are other tune related factors you must consider. If in any doubt, speak with a professional tuner / calibrator.

What is the StraightGate all about?
The StraightGate50 from Turbosmart is a butterfly style external wastegate which uses a zero-offset and self-balancing butterfly valve to control exhaust gas flow. Unlike the traditional poppet style valve, these wastegates both flow extremely high amounts of gas thanks to the efficiency of such a valve, over a poppet style, but also much greater control. All wastegates have a dynamic performance where flow can be measured against lift. A Poppet style generally has a relatively large amount of flow at initial opening and low lift which hen tends to flatten out as the valve lifts. StriaghtGate50 by comparison has a very linear flow versus opening angle as especially as greater resolution around initial opening and low opening angles.

Self-Balancing?
Yes. The StriaghtGate50 uses a zero-offset style butterfly valve, and this means at any point in time, the exhaust gas energy being applied to the valve is offset by the fact the force is being applied to the side of the valve that opens as well as the side of the valve that closes. This effective force equals zero meaning theoretically, no matter what force is applied it is balanced out with no effect on valve position. This means the wastegate is massively easier to control which means lighter springs can be used, faster response can be achieved and better real-world performance and reliability.

Over 5 X Base Pressure?
Yes. Traditional Poppet style wastegates can generally achieve between 2-3 times the base spring pressure in overall pressure. That is, for 10 psi of base spring pressure, it is likely you can achieve between 20-30psi of overall pressure with reference manipulation and boost-control. The StraightGate50 however benefits from the self-balancing zero-offset butterfly valve and due to this, can provide a much larger tuning window. The StriaghtGate50 can achieve more than 5 times the base pressure so for the same 10psi spring example above, you can expect over 50psi total boost with reference manipulation and boost-control.

What do I need to Control them?
Unlike the Electronic StraightGate50 which requires and advanced control strategy, the Pneumatic Series of StraightGate50 requires fairly common control strategies. A simple Boost-Tee will run make great results from the Boost-Based version while traditional Vacuum-Based strategies will work perfect on the Vac-Based StriaghtGate50. It’s simple reference manipulation and controlled bleed – the kind of boost control that has been around and common place for decades.

What Mounting Options do I have?
The V-Band allows rotation through 360 degrees with no impact to valve operation. Further to this the Billet Actuator bracket can be clocked to anyone of the three options provided by the 3-pin mounting system providing a huge range of mounting options to fit into even the most complex and packed modern engine bay. There are design elements to ensure the least heat transfer possible into the diaphragm housing and we have validated this to 1300 Degree C with no impact on performance and reliability. Like all things however, the best way to mount the unit would be to acknowledge the basics… Exhausts and manifolds are hot & heat rises spo the further away from the heat source and where possible, below it (rather than directly on-top) is ideal if possible. Also, to note, even OEM actuators on turbocharged factory cars place actuators in front of the turbo, in a stream of engine bay air-flow so offering your wastegate the same courtesy, will ensure a long and trouble free service life.