Gents;
It is my intention to mount a Kubota dynamo atop a Pinto ICP valve cover, and driven by a pulley mounted to the face of the cam pulley. I spoke with tech support at PowerMasters Racing Alternators, only to realize there are several variables in determining the two correct pulley sizes. Dave Weitzenhof addressed the dynamo speed needs to be at or less than 4,000 RPM. Questions:
- What is the ratio between crankshaft RPM and cam RPM (read: cam RPM at 7,000 engine RPM)?
- To keep the dynamo at or less than 4,000 RPM, it needs to be under-driven at 57%, right?
So I need help with determining either the two pulley ODs (Poly-V) or teeth count by anyone who is not math challenged, please.