Chevrolet BBC Chevy Engine Pro Rough Idle 396 402 427 Hydraulic Flat Tappet Cam. Chevrolet big block V8 1967-95 396,402,427,454 C.I. / 1969-90 366 ci. (Chain drive). These cams are brand new in the box from the factory. Please look at the second picture for cam specs.
Hydraulic Lifter Cam
Stage 4 Cam (see cam range & selection chart), (2nd Picture).
Duration @ .050 Intake 224 Exhaust 232
Advanced Duration Intake 302 Exhaust 304
Valve Lift .527 Exhaust .553
Lobe Sep. Intake 110 Exhaust 118
Power range 2500-6000
Idle: rough
Comment: High Performance street, strong mid-range.
- Ground in the USA American made casting and billets
- Computer designed lobe profiles for maximum power
- Journal roundness maintained to within .0002"
- Manganese phosphate coated, flame hardened castings or induction hardened billets
- Profiles are Adcole verified for the ultimate in accuracy
General Stage 4 Camshaft Specifications:
- Idle Quality: Rough. Manifold Vacuum Will Not Operate Power Brakes
- Torque: Mid-Range 3000-4000 RPM
- Fuel Economy: Poor
Recommendations:
- Towing:Not Recommended
- Racing: Bracket Drag Racing, Limited Oval Track
- Computer Controlled Vehicles: Not Recommended
- Transmission: Automatic With High Stall Converter or Manual
- Compression Ratio: 10.5:1 To 11.0:1. Check Valve to Piston Clearance
