....havent been on the forum for long so sorry if this has been covered a billion times.
But when doing the 25/6 head swap on the 30 bottom end doesnt it lower the compression a fair bit due to chamber size (i think i read that sumwhere).
Anyways, how much does it lower it, say if you have 9.5:1 CR with a rb30et, wat would comp be if you just did the str8 up 25 head swap and didnt touch the bottom end?
Thanks
Jon