Thread: Norwood
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Old 09-12-2012, 09:22 PM
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Sieg Sieg is offline
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Finally found out what cam the motor has.........because there was two bad lifters and lobes. Motor still has good cross-hatching in the cylinder bore. I learned something I was totally unaware of - zinc additive for flat tappet cams. Obviously I wasn't in the car scene when zinc was removed from oil and this became an issue.

The cam was installed in 1989 and they still sell the pattern.

Edelbrock 5002

Summit Racing Part Number EDL-5002

UPC 085347050024

Cam Style Hydraulic flat tappet

Basic Operating RPM Range 2,500-6,500

Intake Duration at 050 inch Lift 232

Exhaust Duration at 050 inch Lift 234

Duration at 050 inch Lift 232 int./234 exh.

Advertised Intake Duration 292

Advertised Exhaust Duration 300

Advertised Duration 292 int./300 exh.

Intake Valve Lift with Factory Rocker Arm Ratio 0.488 in.

Exhaust Valve Lift with Factory Rocker Arm Ratio 0.488 in.

Valve Lift with Factory Rocker Arm Ratio 0.488 int./0.488 exh.

Lobe Separation (degrees) 108

Hopefully the crank and rod journals pass inspection.
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