Originally Posted by BSB67
Originally Posted by lewtot184
the comp cams catalog states: "high performance street. superior high end. works with stock converter. choppy idle." the stock cam has 44 degrees of overlap and the comp cams has about 60 degrees. I guess you'll have to decide what you can live with.


Agreed. Depends on what the OP wants. This cam is bigger than stock no doubt, and will have more idle, but should work fine without having to change anything else to make it work fine, IMO.

Do you know what lift the "advertised " duration are measured at between the factory and Comp Cam cams? Are they both 0.006"?

Anyways, looking at the overlap based on "advertised duration" in a vacuum of everything can be misleading. The slow off the seat rate of the Comp Cam will make it feel less radical than the overlap numbers might otherwise suggest, IMO.

Although the advertised overlap is longer, it's overall overlap "area" is not that large due to the slower off the seat rate. Plus, it will be easy on parts.

Is there a better cam, probably. But if the price is right, I don't see this being a bad choice at all.



I haven't measured a stock 340 cam. I do have the service manual specs. I know on a 440 magnum cam to get the 268/284 numbers the closing ramp needs to be omitted. if I was using a 440 and wanted a cruise around cam I might consider this one, but 100 cubes less might make me a little gun shy. maybe showing my age but i'm just getting more conservative on cam selection. there is a guy around my area who uses the comp cams replacement (268/276, .464" lift) in his 340's and like it. I don't like that cam in 440's. everybody has to pick their poison.