Fred T. Maybe you are as good a person to ask as anybody this question: When I got the M4F cam last year and installed. The valve lash settings they had on the cam card did not seem correct (005 tighter for break in) so I called the Cam Company. They said the cam card was incorrect and to set the lash at stock settings. What I did find out though was the cam needed to be set 4 degrees advanced. Maybe thats why mine runs strong and with no lifter noise with the stock settings.

"Drugs are money, money is power, power is security." - Kent Heiner
Nedrow population 2212
Carbon footprint family of 2/11 tonnes of CO2/yr