{"product_id":"wildcat-wc946-cnc-ported-cylinder-head","title":"Wildcat WC946 CNC-Ported Cylinder Head","description":"The EC Carburetors Wildcat WC946 CNC-Ported Big Valve Cylinder Head is engineered for serious airflow gains in racing and high-performance applications. This head is precision CNC-ported on multi-axis HAAS machines, ensuring unmatched port-to-port consistency that hand-porting cannot match. This guarantees high-flow performance right out of the box.\n\nThis performance head features 32mm intake and 27mm exhaust stainless steel valves with 5mm stems for improved strength and reduced mass. A multi-angle valve job and bowl blending are performed on a Rotter Seat \u0026amp; Guide Machine, and the head is vacuum-tested for proper valve seal. It includes titanium retainers and dual valve springs, set at a 1.000\" installed height with 43 lbs closed seat pressure and 115 lbs open at .575\". The spring pockets are cut to handle up to .400” of valve lift, compatible with a wide range of cams and rocker ratios (1.1 to 1.4).\n\nThe 18cc combustion chamber is carefully designed to balance flow and compression. For higher-displacement engines, this chamber size can support higher compression without detonation, but may require high-octane fuel or methanol in builds like the 236RX and 240RX, especially with higher compression ratios. Compression ratio estimates vary by engine setup and gasket thickness, ranging from approximately 9.22:1 to over 12.21:1.\n\nThe Wildcat WC946 is designed for Predator 212 Non-Hemi, Tillotson 212R \/ 225R \/ 228R \/ 236R \/ 240RX, Wildcat 240RS, and other clone engines that accept 18cc non-hemi cylinder heads with stock bolt patterns. A detailed installation and setup guide is available to assist with integration into your build.","brand":"EC Carburetors","offers":[{"title":"Default Title","offer_id":52687888482616,"sku":"WC-946-5","price":359.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/663682033.jpg?v=1784887093","url":"https:\/\/store.motormia.co\/products\/wildcat-wc946-cnc-ported-cylinder-head","provider":"MOTORMIA","version":"1.0","type":"link"}