Euro R inlet manifold porting & polishing

Discussion in 'Project & Modification Logs' started by tpog60, Thursday 18th Jun, 2015.

  1. tpog60 Club Member ★ ☆ ☆ ☆ ☆

    Rob Plymouth
    What are peoples thoughts on this? I will porting it at work on the cnc mill, but as far a polishing goes what grit to I finish with? there are so many differenet things about 120grit or 180. how smooth do you go???
  2. Ichiban Founder Staff Team

    England CJ Leeds
    When I used to raise port heights on a 2 stroke engine barrels I would leave them with a slightly texture port finish. A rough intake port keeps the fuel-oil/air to be atomised better than a smooth one.I would do for a mirror finish on the exhaust side, but what to use is endless,steel wool,120 grit paper, polishing burs and pads with valve grinding paste, basically chose what ever you can and let your finger touch and feel and eyes guide you.