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 |
