11. So, he invented his own device, a valve spring lifter, and combined it with a compressor. 12. Also unusual was the adoption of only one hairspring valve spring to close the exhaust valve. 13. In an OEM valve spring application, the mechanical design combined with some shot peening ensures longevity. 14. Automotive makers are shifting to more high performance higher stressed valve spring designs as engines evolve. 15. Unlike the valve springs keep the valves closed. 16. If an engine spins too quickly, valve springs cannot act quickly enough to close the valves. 17. The landing gear is tubular steel, with automotive valve springs and rubber hose inside, for shock absorption. 18. Alpina reworked the head which was ported and polished, installed harder valve springs and a hotter cam. 19. A more aggressive camshaft was used, with higher lift and duration, and harder valve springs were installed. 20. A valve spring broke with only 23 laps to go, and the car coasted to a stop.
