My Jones Cam Recommendation

yellow rose said

I *THINK* that his 316 number is measured in a different manner.

Been awhile since I've talked with Mike but I remember him not being too excited about the advertised numbers for some reason.

Should have written that down when we were talking about it.

12many could go to speedtalk.com and join there and ask mike on the forum. Then you'd have a public answer about his numbers and why he called out what he did.

Click to expand...

Found the explanation there, so that takes care of that. Still a pain trying to compare different manufacturers specs. Getting there though! From a post at Speed-Talk by Mike Jones:
“This is Why since 1979, we have never used a .020" duration number to classify our cams. We use the actual seat duration(Hot Lash divided by rocker ratio). Tight lash or loose lash, it doesn't matter. When we say we're giving you a 296 seat duration cam, the valve will be open for 296 degrees. Our 296 degree tight lash, will keep the valve open the same amount of time as our 296 degree loose lash. This makes it easy to compare all of our profiles. With all the different lash's and different acceleration rates, the .020" number is useless”