Recent content by Herk

The Wasp Jr was 985 cubic inch so a 1/6 scale version would be a whopping 164 cubic inches or 2660 cc, while a 1/16 scale would be 61.6 cid or about 1000 cc. A 1/6 scale version would be quite impressive and might end you up with something like this Kitfox with a Rotec

Every pushrod Triumph engine I have ever worked on has been the same way. 4 different ways the cam gear can be installed, each 1/4 tooth different. About 2 cam degrees or 4 crank degrees different per 1/4 tooth.

The taper should be Morse #3, but larger than a typical MT3 tool shank. This was standard practice for SB going at least back to our 1914 16" gap-bed. Early O-series machines had some other odd dimensions which were standardized after WW1. I'm faced with 14DP change gears, and a 2-3/8" 8 TPI...

Chris Craft engine was designed and produced for them by Hercules.