21. Some versions have variable valve timing ( VVT ). 22. It is an all-aluminum design which, while still a pushrod engine, boasts variable valve timing . 23. Compared to the American version, both Active Fuel Management and variable valve timing were removed. 24. The engine also features Nissan's VVEL valve timing technology. 25. Valve timing and the valve profile are continuously altered according to conditions and engine load.26. Honda accomplished these improvements primarily through the use of " intelligent " variable valve timing . 27. VTEC, by the way, stands for " variable valve timing and lift electronic control ." 28. Variable valve timing ( VVT ) was also introduced. 29. Holden introduced the new " Displacement on Demand and variable valve timing have been removed. 30. For 2000, the engine gained variable valve timing for five extra horsepower ( to 125 ).
