Re: Cams - what does it all mean?
Other than the lobe seperation, i look at lift and the duration at 50 thou. The lift is ovious. The higher the "meat" on the lobe the more the pushrod pushes and the more the lift at the valve is.
Duration indicates how long the valve is open. The 50 thou figure measurement is taken from the instant the valve is opened 50thou off the seat, untill it opens thens shuts untill it is 50 thou from landing on the valve seat again. The 50 thou figure is listed as this is where airflow really starts. When the valve is 10 thou off the seat, there is bugger all aiflow happening, so they give the 50 thou figures. These are generally the figures to look at when comparing cam duration.
10.70 @ 125.00 on the black fun top
408 Cube Cleveland.