318 rebuild suggestions

rumblefish360 said

Karl, the OE cam has a intake duration of something like 210? (Or less) I can not remember off hand.
The 268 has a intake duration of 214 IIRC
The MP replacement 340 cam has a intake duration of 222 or 228 or so.

The advertised numbers are miss leading vs. the duration @ .050.

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Yes, it's hard to do a good comparison of the numbers from manufacturer to manufacturer as they also measure their cams a little different.

Mopar didn't use duration @ .050 until the 90's or so, so it's hard to find a comparable .050 number for the old stock camshafts.

that's why I'm going to degree all the cams that I have, so I can compare them apples to apples because I will measure them the same...


I was just giving him the book specs for the stock 340 cam like he asked...