Mazda b3 head questions

[jason_]

Hey registered because I figured I could find out the information I need for my project.

I'm taking a Mazda b3 head and milling it to bump the compression. I was told the b3 heads can be milled, but no more then 0.02. I just did a head, I shaved 0.038, and she's doing fine. I'll love to mill 0.04 or 0.05, but the rumor worries me about the 20 thousandths.....

Anyone have any type of information? I'm assuming the 20 limit was because of the water jacket castings.

Thanks

 

[jason_]

No one has any idea? I'm also having trouble trying to find information of the cc displacement. I did a redneck syringe with water. With plug in, about 28cc....

I'm surprised no one knows information like this about a Mazda engine.. , is this generally a bolt on information website?