![]() ![]() Now that you know the basics, let’s explore how to install this incredibly useful gadget on your car. ![]() This APS valve has a 30-micron hard anodized, T6 billet aluminum body, low friction bronze piston and all stainless steel hardware. Moreover, it increases the durability of the turbocharger. With this twin-vent valve, the turbo response is better and improved. APS designed ones specifically for this model. If you have a Subaru Impreza WRX/STI, it is necessary to know that it has unique blow off valve requirements. Along with its functions, this valve has a powerful blow-off sound and appealing appearance. The HKS SSQV can be used for custom applications as well. The primary valve opens initially for light pressure, followed by the secondary valve under high pressure conditions. It has two valves: primary and secondary. This valve is stable, and it doesn’t leak with high pressure, nor is it ever under vacuum. To prevent duplication, the blow off valve has a holographic HKS logo on its back in addition to logos on it body. Now, the latest Super SQV 3 has a nickel-plated, die-cast metal secondary valve, and a stainless steel C-Clip and spring. Its unique pull-type sequential valve structure was an auto lover’s delight. This pull-type valve was engineered in such a way that it was stable no matter how much boost or pressure is present. HKS designed the first Sequential Blow-Off Valve in 1994. HKS Super Sequential Blowoff Valve (SSQV) For example, some are fitted with trumpets-shaped outlets to give a better sound. Interestingly, some valves are made in a way that they enhance the sound. This action produces a variety of sounds that car enthusiasts generally love. It lets off this compressed air into the atmosphere, thus preventing damage to the turbo. When the system is pressurized, air tries to go back though the turbo and this is where the blow-off valve starts functioning. As long as the throttle is open, the air moves along. When a car is running at high RPMs, a huge amount of air continuously enters the engine through the throttle and the turbo then attempts to compress it. The Super SQV will operate under any boost pressure setting without leaking.A blow-off valve is what gives a turbo car the popular “whoosh noise.” It is a device that releases high-pressure air into the atmosphere when you cease throttling, effectively safeguarding the turbocharger and engine from “surge loading” damage. If the spring load setting is too strong, it may not open at low boost. If the spring load setting is too low, the valve may leak under high boost and the desired boost setting may not be reach. Typical push-type blow off valves require spring load settings for each vehicle specification. Pull-Type blow off valves will work for any turbocharged vehicle, from stock to highly tuned. When pressure difference in chambers A & B reach a maximum, the Primary Valve pulls the Secondary Valve open, creating a secondary discharge. Throttle lift creates a pressure difference between chambers A & B, opening the primary valve bypassing the secondary valve. The higher the boost pressure, the more pressure is applied to the valves, preventing leaks. Optimal blow-off operation from how to high boost ranges without leaking.Īt low boost ranges the Primary Valve opens, and at high boost ranges the Secondary Valve also opens, resulting in linear response and optimal blow-off operation at all boost levels.Īs pressure rises in chamber C, pressure is applied to both the Primary and Secondary valves. This valve combined with the Primary Valve from the sequential dual valve structure. Lift off the throttle, and the primary valve instantly opens, quickly discharging initial excess boost pressure. The Pull-Type valve operation offers more precise relief of excess boost and is compatible for a wider range of boost pressure compared to typical push-type blow off valves. An optional special Round Fin can be purchased separately for sound tuning. ![]() Triple Fins set at the center of the funnel produces a dynamic and aggressive sound. Reliable operation with beautiful looking.ģ.Triple Fin design produces "Super Sound" Secondary valve main portion is made of die cast metal. Combines the ultimate in looks and durability in the engine compartment. The Super SQV will support new generations of turbocharged vehicles. Its Pull-Type relief design ensures stable operation regardless of the amount of boost pressure. HKS Super SQV (Sequential Blow Off Valve) uses a unique sequential valve structure and a differential pressure control system, which allows for a broad operating range from low boost to high boost.
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