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Hello everyone, I’m in the early stages of working on a 4 cycle “Powerhouse” engine by Jerry HowelI, and I had a few questions for the experts here. 1. What type of stainless steel would be best for making the exhaust valves? 2. Does anyone have any recommendations for making custom springs...

Hello everyone, 17 year old engine enthusiast here. I’ve been working on a few projects for awhile now (with some advice and aid from my much more experienced father). Currently, I’m in process on both a Jerry Howell Miser Sterling engine and a Powerhouse 4 Cycle ICE. I also have the plans for...