Ok guys here's the situation. I have a perfect d16a6 block sitting in my garge, ready to be built from ground up, to a nice little mini me, but on the other hand a z6 would be easier....so I need some opinions. Anything will help. Thanks.

 

With a stock bottom end A6 and a Z6 head you will have slightly higher compression meaning more power vs the stock Z6 swap. So it's your choice. 9.95 to 1(pretty much 10 to 1) or 9.1 to 1.

 

Better compression? Hmmm that makes more sense, and it'll be cheaper. Thanks marty.

 

higher compression ratio asin a smallerspace for the gas to blow up in your cyl. Smaller place for the same amount of gas to explode in(also called combustion) the more force it will push the piston with. More force = more power.

 

Wow. I get ya. I didn't really think about it like that haha. Cool so now I just gotta get all the parts and the build is on!