Plastic automotive engine
Version one was based on Ford's 2.3-liter Pinto engine and weighed (vs. for its cast iron counterpart). It was designed to produce at 9200 rpm. It was composed of metal cylinder sleeves, metal combustion chamber tops, metal piston crowns, bearings, valves and seats, and a stock 2.3L Pinto crankshaft. Nearly everything else in the engine, including the block, rods and piston skirts, were made of glass reinforced Polyamide-imide thermoplastic resins manufactured at the time by Amoco Chemicals Co. The engine was never installed in a vehicle.
Ford 335 engine
The 351 Cleveland was introduced in 1969 for the 1970 model year. Its actual displacement was . A 4V (four venturi) performance version and a 2V (two venturi) version were built. The 351C-4V was marketed as a high-performance engine, featuring large valves and ports and a closed "quench" combustion chamber. Later versions of the 351C with 4V heads continued to use the large ports and valves, but switched to open chamber heads in an effort to reduce engine emissions. The 351C-2V was never marketed as a high-performance engine. It used cylinder heads with smaller valves, smaller ports and open combustion chambers to produce a more economical engine that produced greater low-rpm torque. Only the Q-code 351 "Cobra Jet" (1971–1974), R-code "Boss" 351 (1971), and R-code 351 "HO" (1972) versions have four-bolt main bearing caps.