I would reccomend leaving the third needle alone. On my vspec I have messed with the MSN but I could barely seee any performance gain and temps rose alot. I checked out a pros enigne (vspec and speed) and they had it at the 2 o clock position (3 hours leaner than stock) and I have left it at that ever since and runs fine. It will give you alot of headaches and not alot of performance gain.