Hey, just trying to learn what the numbers for cams are. Like I see Dur @.050(206/214 .500/.500 114) does the .050 mean cam to lifter gap? I assume the the first pair is duration for intake/exhaust while the second pair is valve lift for intake/exhaust? What is that final number?

Thanks!

 

Duration @ .050" is just a common benchmark.

When you can measure that the lifter has risen .050" off of the base circle, you start counting duration. Make sense?

There are also advertised durations which are generally .006" and .004" if I remember correctly.

 

Last number is LSA.

 

When people on here post it is generally in this format.

(intake duration@.050")/(exhaust duration@.050")/) (intake lift with 1.7 ratio rockers)/(exhaust lift with 1.7 ratio rockers) (lobe seperation angle)

Effectively it tells you very little, but it gives you something to compare to.

If you are still interested, hop into one of the 147 page camshaft technical discussions.