For supercharging applications, surge occurs when excessive boost or pressure spikes as a result of a sudden throttle blade closing, which can cause severe damage to a supercharger and is why we mandate all ProCharger supercharger installations use a blow-off valve.
ProFlow Valve: The ProFlow valve is the standard valve option for our street supercharger systems and kits. Compact in size,
it can be fitted into tight spots when space is limited. Its butterfly valve is extremely durable and reliable, and this design creates a straight airflow path that achieves excellent flow for its size. The ProFlow valve can also be paired with a small air filter to minimize noise.
Bullet Valve: This valve’s compact design also makes it fit easily in tight spaces.
It comes in both an open and closed format. The closed format allows you to recirculate air back into the system, or instead to run to an air filter to minimize noise.
Race Valve: This is the industry-leading blow-off valve for both street and race applications. The larger valve diameter is designed for high-flow applications.
Competition Valve: Designed with the Pro Mod racer in mind; compact, light and fast acting. For use as a pair in applications above 3,000 HP.
ProRace Valve: One ProRace Valve outflows any other single valve on the market and is our highest-hp bypass valve option. This massive flow capacity comes from a piston-style valve design (patent pending) that allows for a significant increase in curtain area over traditional-style valves, while still fitting into a reasonably sized package. It also incorporates a v-band clamp for an easy installation.
Open Blow-off Valves – Vents to the atmosphere and creates a distinctive “whoosh,” when the throttle blade suddenly closes, which a lot of people enjoy the sound.
Closed Bypass Valves– Vents to an external air filter or an internal tube for rerouting excess boost pressure back upstream of the supercharger for a more quiet and subtle sound. More ideal for street applications where someone wants more of a silent or stealth operation of the supercharger.
For street applications, our complete Systems and Tuner Kits come with the proper valve based on the vehicle’s horsepower output level so, no need to worry about the right one. However, we do offer upgrade options for our Systems and Tuner Kits with our Race valve family for those seeking a little more sound or those that like the cool look of the anodized finish of our Race valves.
Contrary to most perceptions, a blow-off valve is designed to relieve boost/pressure when the throttle blade is closed. Conditions such as idle, during shifts, and backing off the throttle during tire slip conditions are very important to have a blow-off valve. A blow-off valve utilizes a vacuum line port behind the throttle blade and vents when detecting an immediate change in pressure. Blow-off valves are different from a wastegate relief valve, which operates as a pressure relief valve and opens or vents excess pressure when a certain pressure is achieved.
The correct answer is no. Our superchargers are designed to provide maximum boost and efficiency at the maximum engine rpm. Adding a wastegate relief valve to vent that boost is defeating the whole purpose of having an efficient ProCharger supercharger. Proper supercharger pulley size and knowing how much boost your engine can handle at its rated max rpm are the keys to success with a proper ProCharger setup.
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