<VV> 304 Cam lift

[ScottyGrover at aol.com]

In a message dated 5/24/2008 9:50:11 P.M. Pacific Daylight Time,  
BobHelt at aol.com writes:

Does  anyone know the lift (at the cam lobe) for a 304 cam, and  what the 
wear 
limit  is?



0.249 +-0.002  inches.
HTH
Regards,
Bob Helt



My manual gives .260 lift for the 891, and a wear limit of  .253.
 
With these figures and an advertised rocker ratio of 1.58:1, my calculator  
tells me that lift at the valve is about 0.411"; are these maximum lifts for 
any  GM cams? and if so, why are various people telling me that I ought to 
calculate  my heads to be able to service 0.750" lift; 0.500" I could see, but what 
 aftermarket cams generate anything like 0.750" at the valve?
 
Scotty from Hollyweird



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