Chambersize and comp (stock heads)? and mill??

[moosejaw]

Stock heads are 64cc. Trick Flow twisted wedge,for example, is 62cc. Use the 64cc and stock compression of 9.0:1 to calculate how much to shave. Don't go over 10.5:1 compression.

Although you say you have 95-98 octane, is the octane rating the same units as we use in the U.S.? If the units are different you may not be able to raise your compression much at all.

Look in the tech articles for the gasoline discusion for the different types of gas ratings.

Does this answer your question?

mike