V8 Engine model | Functional DOHC timing

Description

This project is a fully functional V8 DOHC engine model designed for 3D printing. It features a realistic dual overhead camshaft layout with an advanced three-loop timing chain system, moving pistons and valves, and a correct V8 firing order. The model is designed as a mechanical assembly, not a static display — all major components move and interact, closely reflecting real combustion engine kinematics. Dimentions: ~200 mm x 170 mm x 100mm Estimated printing time (0.16mm): ~22h Estimated filament usage: ~400g 🔧 Key Features Fully functional DOHC valvetrain (intake and exhaust camshafts per cylinder bank) Advanced three-loop timing chain system Moving crankshaft, pistons and valves Correct firing order: 1-8-4-3-6-5-7-2 Chain-driven timing system with tensioner and guides Can be rotated manually or powered by a DC motor Designed around standard 606 (2x) and 608 (9x) bearings (printable bearing models included) 📦 What’s Included Complete set of printable parts (.3mf files with optimized orientations) Detailed step-by-step assembly instructions with exploded views Printing guidelines and troubleshooting tips All files are prepared to make printing and assembly as straightforward as possible. 🔩 Assembly & Hardware The model is assembled using standard metric hardware: Bearings: 606, 608 (commercial or printable versions included) Screws: M3 / M4 with nuts (10,16,20,25mm lenght, exact list provided in the instructions) DC motor: TT type, geared , 48:1 ratio, No special tools are…