c3az-6250-d CamShaft

[patrickt]

From my old Ford catalog. It's a moderate cam, not suitable for today's Cobra (IMO). You'd want something bigger.

[blykins]

Not necessarily bigger, but more modern. The cams from the 60's are so........60's......

I believe that cam has a .050" duration of around 224-230°, which would be a good streetable cam for a 390 with good flowing heads. However, it's got a ton of overlap and some pretty lazy lobes.

It would work, but there are extremely streetable cams that would run circles around this one.

[olddog]

Originally Posted by patrickt

If you do the math on the "D" cam, it is a miss print. Duration adds to 225 and overlap adds to 33. Either the timing evens is wrong or the the Duration and overlap is wrong. Possibly both are wrong. Note the intake is opening after top center and the exhaust is closing before top center, which is wrong.

The other cam adds up.

[patrickt]

Originally Posted by olddog

If you do the math on the "D" cam, it is a miss print. Duration adds to 225 and overlap adds to 33. Either the timing evens is wrong or the the Duration and overlap is wrong. Possibly both are wrong. Note the intake is opening after top center and the exhaust is closing before top center, which is wrong.

The other cam adds up.

You did your math wrong. The numbers are are at .100 lift. Here, I was kind enough to graph it for you.

[olddog]

Originally Posted by patrickt

You did your math wrong. The numbers are are at .100 lift. Here, I was kind enough to graph it for you.

I missed the .100" lift. Well that is the first time I ever seen timing events listed at a different lift than the duration was measured at, let alone at such a high lift. Strange.

Anyway thanks for the graph and explanation.