Originally Posted by d-coupe
I made a post on FJ and didn't really get a real answer. What are the differences between the 2.3 head and the 08+ 2.0 head? Are the combustion chambers the same size? are the ports really that much better in the 2.3?what all needs to be done to run an earlier 2.3 head on a 08+ focus? I found a couple rebuilt 2.3 heads online and was thinking of running the crower springs-retainers and either the stg2 or stg2 turbo cams.
You should be able to bolt on a 23 head. Massive performance has cams for the '08+ motors. Are you going to add a turbo? Do the rebuild heads have 1 piece ss valves? If your going turbo, I'd probably run the 20 head. If not do a 23 head & go for the stage 1 cam. The ports are bigger but they both have the same size valves. I;m not sure of the cc's of each head. The compression is higher w/ the 20 thou.
Hit Massive up.