This week I notched the cylinder skirts so that the forged aluminum rods can clear them during rotation of the crankshaft. I used a Bridgeport milling machine and a radiused end mill to do the job. I followed up with a small grinding stone on a Dremel too to chamfer the notch and eliminate any rough edges that might harm the piston.
The depth of the notch ended up being 8 mm with a width of 28 mm. This allowed the forged aluminum connecting rods to clear the cylinder skirt by a little over 2 mm.
Here’s this week’s video showing the whole process.
Keep on hackin…