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  1. Focus RS Performance
    This is my second home-made ported head, still learning as I go. The first runs great: the engine has incredible mid-range and the head porting + Ford Performance cams certainly helped. For this second version I went a little further: more porting, in particular on the exhaust side, a bit of...
    cylinder head diyenginebuild performance porting valves
  2. Focus RS Performance
    I decided to go one step further and do some light porting work to complement the Ford Performance camshafts. No idea how effective but I kept the stock spirit and tried not to lose too much velocity on the inlet, after seeing flowbench results of CNC “dimpled” EB2.3L heads with maxed out...
    cylinder head diyenginebuild porting
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