[Bionic Modeler]

I would like to build a larger version of Peter's Trimotor. I have an A3 printer. Since I am working in a larger scale I would like to make the engines a little more detailed since they are the prominent part of the plane. I have studied all the pictures I can find and was wondering if any of you experts could help me with some ideas to make the cylinders and heads more realistic. I also have some ideas on making the manifolds from wet rolled paper. The push rod tubes from wire etc. But I know some of you guys really know how to build these engines so---- "How do I do it?"