I gave bad advice. thanks Clifford. My mind was in neutral while my fingers were in Georgia Overdrive.....
I was thinking 8V71 instead of 6V92.
Unless you know for certain what valves you have I would be leery of going more than .059. You wouldn't want to find a piston crown in the pan at the next oil change, or have a valve shoved sideways into places it shouldn't be!
As Clifford says... as the engine warms up, the settings will get tighter. I always try to do a preliminary set on a cold engine, just to make it run, then let it run for awhile until it reaches about 140-180° and do a reset as it's cooling off.
If the bridges were set while the engine was cold, you can be pretty sure that they are a bit tight when at operating temperature.
Valve settings can get as much as .004 tighter with just a small change in temp. That would make your .015 setting down to .011, leaving the valves open too long.
You were typing at the same time I was.
If the setting isn't too tight, there isn't a problem, but the Jake itself keeps the valve open as far as it can go through a full revolution, allowing the piston to hit the top dead center point with the valve open. Normally, the valve is closed at TDC