Also I would like to post that since working with Ebmods, Ed has had the ability to test many things on the engines.

For the past month I have asked some of the team drivers to experiment with lower head shimming per Ebmods reccomendation. We have found that dropping the head shimming down to .019-.020 will give a nice increase in power out of the engines.

So far there hasn't been any negative side effects, but it will make tune a little trickier for someone who is not familiar with the engines and most importantly it cannot be dropped untile after the metal pinch is gone, or you will find it very hard to tune and possibly blow glow plugs.

So if you have some calipers you will bascially run 1 alumn. and 1 copper shim and measure them till they are around .019 to .021 and install and go.