Hey guys. I got a cam out of a Caprice cop car 350 engine and I want to know what the rough specs are on it. I was thinking... could I measure the lobe height with a dial caliper and get a ballpark idea of what the lift would be on this cam ? A buddy wants to buy it but he would like to know if it's any better than his L98 cam in this 90 GTA. Thanx

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92 Z28 L98 350
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Ported and polished heads, ported stock TPI base, ported plenum, Comp Cams XR270HR-10 cam (lift .495/.502 duration 218/224 lobe separation 110), Edelbrock TES headers, LT4 valve springs, Crane AFPR, Flowmaster catback with LT1 style tips, MSD coil & wires...

"Take that auto, drop it in first, hold the brakes, stomp the gas and grin from ear to ear! :-)

 

You need a dial indicator, not a caliper. Put the cam in a couple of wood v-blocks on the bearing journals so you can turn it. Find the lowest spot on an intake lobe, set dial to zero, then turn the cam to the high spot. That is the "gross" or "cam" lift. Repeat on an exhaust lobe.

Multiply your results by 1.5 for stock rocker ratio to get the "advertised" lift.

Put a degree wheel on it, and you can get the duration as well (multiply by two since the crank turns twice as fast as the cam, and duration is given in crank degrees).

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82 Berlinetta, orig V-6 car. Rescued w/86 LG4/TH700R with all harnesses, sensors, ECM, etc. 2.73 open. Cat-back from '91 GTA, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LB9 w/ZZ3 cam, ported heads, exhaust, paint, etc.).
57 Bel Air, my 1st car. Currently 396 .030 over, Weiand Action+, Edelbrock 1901 Q-Jet, Jacobs Omnipack, 1-3/4" headers, TH400 w/TCI Sat Night Special conv & shift kit, 3.08 10-bolt, AMSOIL syn lubes bumper-to-bumper. Best 15.1 @ 5800' Bandimere. Daily driver while Camaro was being put together.

 

You can get the hieght with a dial caliper if you pull the cam out of the engine..inside you'll need a dial indicator.

IF you have it out....just measure the hieght and the width, and subtract.

 

Take the part number, call the mfr, get the specs. that's what I would do.

 

The manufacturer is obviously GM. The cam is out of the engine also. Don't have a dial-caliper otherwise I'd do it that way and wouldnt ask about using a regular caliper. Anyway... I'll measure the lobes and substract like Jester suggested.

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92 Z28 L98 350
---------------
Ported and polished heads, ported stock TPI base, ported plenum, Comp Cams XR270HR-10 cam (lift .495/.502 duration 218/224 lobe separation 110), Edelbrock TES headers, LT4 valve springs, Crane AFPR, Flowmaster catback with LT1 style tips, MSD coil & wires...

"Take that auto, drop it in first, hold the brakes, stomp the gas and grin from ear to ear! :-)