Re: cam or no cam

[tr6taylor@webtv.net (Sally or Dick Taylor)]

Alan---A quick and fairly reliable way to detect a stock cam from a
performance cam, without engine tear-down is with a vacuum gauge. The
stock cam should show around 20 in., while performance cams will be much
less. The S-2 signal is down around 12 inches at idle. The longer the
valve overlap, the less vacuum the engine will pull at idle.

Dick