What are the specifications of HP89?

Product Description: ATK Engines; High Performance Crate Engine; HP89; Stage 1 Base GM Aluminum Head V8 350/390HP/420TQ

Specifications:

• HP: 390
• Torque: 420
• Engine type: Chevrolet small block V8
• Displacement: 350 ci
• Block: 4 bo lt main/roller
• Crankshaft: OE 1 piece seal
• Bore/Stroke: 4.040 x 3.480
• Rods: Powder metal
• Pistons: Hypereutectic
• Rings: Moly
• Camshaft type: HYD roller
• Camshaft lift: .528 in x .536 ex
• Camshaft duration @ .50: 220 in x 224 ex
• Cylinder heads: ATK High Performance aluminum
• Chamber size: 64 cc
• Valve size: 2.02 in x 1.60 ex
• Intake runner volume: 195 cc
• Compression ratio: 10.0:1
• Rocker arms: 1.6:1 steel
• Recommended fuel: 91 octane
• Ignition timing: 36 degrees total advance
• Max RPM: 5800
• Dyno proven: Yes