{"product_id":"procharger-proflo-surge-valve","title":"Procharger ProFlo Surge Valve","description":"\u003cp\u003e\u003cfont size=\"4\" face=\"arial,helvetica,sans-serif\"\u003eImportance of Bypass\/Surge Valves Applications utilizing intercooling and those operating at boost levels in excess of 8 psi will benefit from the use of a bypass valve (commonly referred to as a “surge” valve).\u003c\/font\u003e\u003c\/p\u003e \u003cp\u003e\u003cfont size=\"4\" face=\"arial,helvetica,sans-serif\"\u003eIn high RPM, low load conditions, the supercharger is still operating at full speed and attempting to deliver full flow.\u003c\/font\u003e\u003c\/p\u003e \u003cp\u003e\u003cfont size=\"4\" face=\"arial,helvetica,sans-serif\"\u003eWith the throttleblade(s) at or near the fully closed position, the engine is unable to accept the airflow from the supercharger.\u003c\/font\u003e\u003c\/p\u003e \u003cp\u003e\u003cfont size=\"4\" face=\"arial,helvetica,sans-serif\"\u003eIn this event the pressure builds until the flow attempts to reverse direction and exit through the compressor, resulting in a harmful condition known as compressor surge.\u003c\/font\u003e\u003c\/p\u003e \u003cp\u003e\u003cfont size=\"4\" face=\"arial,helvetica,sans-serif\"\u003eInstalling a bypass valve between the supercharger discharge and the carburetor\/throttle body prevents damaging compressor surges by diverting the undemanded charge air to the atmosphere during manifold vacuum conditions.\u003c\/font\u003e\u003c\/p\u003e \u003cp\u003e\u003cfont size=\"4\" face=\"arial,helvetica,sans-serif\"\u003eATI’s butterfly-type Pro-Flo is well suited for applications making 750 hp or less. Applications athigher power levels are best suited for use with our poppet-style race valve.\u003c\/font\u003e\u003c\/p\u003e \u003cp\u003e\u003cfont size=\"4\" face=\"arial,helvetica,sans-serif\"\u003eBypass Valves vs Blow Off Valves Blowers are always producing some amount of boost as they are belt driven, where a turbo spools up as the exhaust velocity is increased.\u003c\/font\u003e\u003c\/p\u003e \u003cp\u003e\u003cfont size=\"4\" face=\"arial,helvetica,sans-serif\"\u003eBypass valves are used with blowers since they always relieve the boost until near zero vacuum (heavy throttle) is achieved. Blow-off valves are designed to relieve boost at a set amount of boost, and can cause boost stacking when used with a blower.\u003c\/font\u003e\u003c\/p\u003e \u003cp\u003e\u003cfont size=\"4\" face=\"arial,helvetica,sans-serif\"\u003eLight springs can be used with blow-off valves so that they can be used with blowers, and many have reported success with doing so.\u003c\/font\u003e\u003c\/p\u003e \u003cp\u003e\u003cfont size=\"4\" face=\"arial,helvetica,sans-serif\"\u003eUnless a blow off valve is properly set up with a light spring though, the boost that is built up places a load on the blower that is hard on it, plus it will try to slow the blower down which can cause belt slippage.\u003c\/font\u003e\u003c\/p\u003e \u003cp\u003e\u003cfont size=\"4\" face=\"arial,helvetica,sans-serif\"\u003eStacked up boost will also try to find weak spot in the tubing and hoses to blow out of.\u003c\/font\u003e\u003c\/p\u003e","brand":"ProCharger","offers":[{"title":"Default Title","offer_id":46571700027569,"sku":"PRO-AV008A-001","price":425.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0727\/5793\/6305\/files\/AV008A-001__10309__77541.1580803535.1280.1280.jpg?v=1767911746","url":"https:\/\/australiaspeed.com.au\/products\/procharger-proflo-surge-valve","provider":"Australia Speed","version":"1.0","type":"link"}