This page will describe the construction of a miniature eight cylinder engine I built in my home machine shop over the past few years. I still have a few small details left to finish, but the engine is running and almost complete. This was my first attempt at building a running miniature engine, I should have started with something a little simpler. I had a great time designing and building this engine and the first time it started was an unbelievable experience. I am going to take the engine back apart over the next several days to modify it for running on racing fuel or alcohol, I haven't decided which yet, I will be increasing the compression ratio by milling a bit more material off the cylinder heads. I will take pictures of all the internal components and post them here along with how I went about machining the parts and tooling.
ENGINE SPECS
 TYPE  FOUR STROKE V8
 NO. OF CYLINDERS
 8
 BORE  1.000 inch
 STROKE
 0.900 inch
 DISPLACEMENT  5.655 cubic inches
 COMPRESSION RATIO  9 to 1
 ROTATION  clockwise
 RPM MAX  12,000
 HORSE POWER  ?????????
 WEIGHT COMPLETE  25 pounds
 FIRING ORDER  1-8-4-3-6-5-7-2
 SUPERCHARGER  rotary sliding vanes 
 CARBURATION  dual WALBRO carbs
 IGNITION  dual electronic
 OIL SYSTEM  two stage dry sump