Just started tearing down a 350 LT-1 from a '71 Z28. Engine block and heads are correct for this model year, found solid lifters, stock rockers and pushrods, but cam does not appear to be original.

The cam has "CAL CAMS" and "284S" stamped on the back surface.

Anyone familiar with this manufacturer / cam? I am interested in the specs to see how they compare to the factory cam for this engine.

Any information is appreciated.

Paul

How about:

Brand: Competition Cams
Product Line: Competition Cams Magnum Muscle Camshafts
Cam Style: Mechanical flat tappet
Basic Operating RPM Range: 2,500-6,500 RPM
Intake Duration 050 inch Lift: 246
Exhaust Duration 050 inch Lift: 246
Duration at 050 inch Lift: 246 int./246 exh.
Advertised Intake Duration: 284
Advertised Exhaust Duration: 284
Advertised Duration: 284 int./284 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.489
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.489
Valve Lift with Factory Rocker Arm Ratio: 0.489 int./0.489 exh. lift
Lobe Separation (degrees): 110
Intake Valve Lash (in): 0.024
Exhaust Valve Lash (in): 0.024
Computer Controlled: No
Grind Number: CS 284S-10 Competition Cams Magnum Muscle Camshafts.

Maybe??


Jim

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1975 Camaro
1972 Camaro (Son's car)
1973 Trans Am 455, 4-spd
1971 Firebird

Jim:

Thanks for the lead.

The cam specs you list is very close to the factory cam grind, so this is starting to make sense.

Paul

Paul,

Cal Cams was a grinder that used to do custom grinds and had many off-the shelf grinds ready to go. They were in the Oakland area of California many years ago and actually had a fairly good reputation.

I haven't heard about them since the 80's so I don't think they are still around.

I might still have one of their old catalogs so I'll try to look up the grind # and let you know if I find anything.

Thanks for the info Kamikaze.

Hope you can find that old catalog.

Paul