Glen,
I just contacted Terry and he has one set of the MK5 cams available. I ordered them along with a set of his radiused lifters. They should be here in a week or so and I plan on using them instead of the MK4s I have. Terry says that the MK5s are easier on the valve train and produce the same power at about the same rpm as the MK4s.
I will install them as is and later try a set of re-ratioed rocker arms to get more lift and duration as the lift is less than the MK4s.
John
My understanding from talking to Terry at Kanab last year is that the MK5s make considerably more power at high RPM than the MK4s do. He said the MK4s were an older design of race cam that was found to be pretty effective but the MK 5s were the ones to get for max power , or words to that effect. I recall the 12 hp figure but that might have been VS his MK2s, I was also considering those.
Anyway, I like the idea of using the Mercedes F1 cam development program to come up with a cam profile. It was the use of this program that showed there was no benefit in lifting those large Vincent Valves higher than .440, hence the lower lift than MK4s.
And I just ordered an extra set of the MK5s plus followers from Terry , supposed to be here in a week or so. He said these were the last he has and isn't planning to make anymore parts. Must have dug deeper in the parts bin, we can't both have the last set!
Here is what I like- Radical cams and a rock steady tickover. something that is essential on a Road bike (mine, not Mal's) that will get used for touring and inevitably get stuck in city traffic.
The midrange sounds pretty healthy too. And 162 up at Bonneville without fairing ain't shabby!
http://youtube.ca./watch?v=ibMu1dBf894
Glen