It's from the Megacycle cam catalog. http://www.megacyclecams.com/ Download their catalog and check it out. They have four different grinds they will hardface on stock cores. I've dealt with these folks for lots of years, and I've always been satisfied.ttpete, Thank you for the numbers. This is a big deal for me. I am about to buy some performance cams, and I wanted to know what the delta was.
Are those stock numbers published somewhere?
Hmm, maybe I won't buy them.
Stock: .345 .355 with 268 deg duration
Perf. .350 .350 with 276 deg duration
I think I will keep shopping out cams. think think
Modern cam profiles have minimized the downside of performance cams. They don't need as long a duration because they've found a way to get the valve open quickly with good lift without losing control of it and getting valve float. And they have a decent powerband. I like to run Megacycle 1060 grinds in the Triumph twins I build. They pull like a freight train in the midrange, but still idle smooth at 1000 rpm.That is why mine are still sitting on the bench waiting for me to decide if it really is worth the $$$ too!
I just checked my valves and had the cams all but out yesterday....it would have been a perfect time to slip in those cams!! lol
There has also been some discussion about how much they would actually give you over a stock set-up. It has been said that unless you use the bike to the upper RPM range you wouldn't get that much benefit from the cams ....another reason why I am on the fence...I'm a 4000-5000 rider.