The Subaru STI EJ257B engine features dual AVCS (Active Valve Control System). This feature enables the builder to extract massive power while retaining great low end driveability. The Kelford range of camshafts feature a very new camshaft design technology termed 'ICE'. This design technique results in a efficiency gain for these engines. No other aftermarket camshaft company offers this approach for the EJ25 engine platform. The Kelford Stage 1 220-B is a cam profile setup for the street and rally. The cams feature a 264 / 260 duration, 10.7mm / 10.20mm Lift. Suits up to 30lb boost and 8000 RPM with recommended valve springs
Specifications:
Kelford Cams 220-B Street / Rally Cams
Cam Lift: Intake = 10.90mm , Exhaust = 10.45mm
Rocker Ratio: Intake = 1 , Exhaust = 1
Net Valve Lift: Intake = 10.70mm , Exhaust = 10.20mm
Advertised Duration @ .25mm: Intake = 264 , Exhaust = 260
Duration @ 1.0mm Valve Lift: Inlet = 225 , Exhaust = 222
Timing @ 1.0mm Valve Lift: IVO = 17.5 ATDC , EVO = 57 BBDC , 62.5 ABDC , EVC = 15 BTDC
Suggested Centerline: Intake = 130 ATDC , Exhaust =126 BTDC
Valve Lift @ TDC: Intake = 0.03mm , Exhaust = 0.07mm
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