Ford Focus Forum, Ford Focus ST Forum - View Single Post - 2.0l to 2.3l head swap
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Old 03-09-2013, 08:29 PM   #22
Lscman
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Quote:
Originally Posted by wickedgreyzx3 View Post
Honestly you're not going to see any noticeable gain. You would be better off polishing the intake ports and running a better set of camshafts.
I'm with you on this head swap mod for N/A apps. Ford did not install a smaller port head on the 2.0L to make it inferior. It was done to better match the head flow to the cam, to optimize powerband, output and efficiency. The bigger head belongs on the 2.3 or on a 2.0 with cam swap to raise the powerband. It's wrong to assume that a head swap will lead to 2.3L powerband or similar peak horsepower. The 2.3L is about 15% larger displacement and this is what makes it about 15% more powerful. It's not the head flow doing it.
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