Comments by "mpetersen6" (@mpetersen6) on "EVERYTHING about the CRANKSHAFT - Function | Manufacturing | Different types | Forged | Billet" video.

  1. The three most machinery intensive parts of an IC engine are the Block, Cank and Heads in that order. For a normal street engine nodular cast iron is just fine. I worked at an engine manufacturing facility for 30+ years. We built 4s, 6s (v & inline) and v8s. Cast iron and forged. One of the V-6s actually was pre balanced as its first operation. Which was drilling the central holes. Plus on both V-6s we built the pins were offset for smooth running purposes. The cranks were forge flat and then twisted and their centerline to get the angular offset needed. As to the strength of cast crankshaft. In the 60s there was an AMC 199 sleeved down to meet USAC Indy rules that made a reported 800 HP as max boost. Another thing with flat plane cranks in V-8s. Using a flat plane actually makes it easier to build a V-8 with an angle other than 90° between the banks. Such an engine is effectively two 4 cylinder engines on a common crankcase
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