It' easy to measure the "clearance ramp" using a set of V blocks to support the cam and a dial indicator. The area of the lobe just off the base circle will have a short area of gradual lift before the valve lift actually begins. Measure that slow lift ramp and set the clearance accordingly. Don't forget to factor in the rocker arm ratio in the process of measuring the clearance ramp. It's much simpler to do the math with the cam installed in the engine and a degree wheel on the crankshaft. Position the dial indicator on the rocker arm tip directly above the valve stem. Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!
Your first picture is terrible. Try flattening the paper out on a flatbed scanner and do a JPEG image. I blew up the first image the best I could then added the second picture as a composite. The specs look the same ???? If that's true, then the hand drawn text for the lash amount is ???
Also note the hand drawn Duration of 254 and 264 on one page but the other page is cut off. Are you sure you have a Bulldog (Langdon)? It may be Patrick's or Delta Cams. If you think it is a Langdon cam, they are still in business. Contact them and let us know what you have.
Just curious. Is this paperwork that came with the car you purchased and are trying to identify which cam you have?
"Adding CFM to a truck will only help at engine speeds you don't want to use." "I found there was nothing to gain beyond 400 CFM."
