Quote: Originally Posted by
Santorican 
Who was the first company with vvt?
Quote:
902, Cadillac M engine. 1.6 litre, 1-Cylinder producing 10hp. The variable valve timing was used for throttle control, rather than high performance.
1981, Alfa Romeo introduced the first Variable Valve timing system to improve performance. (However, I do remember looking through an old 1950's or '60's Hot Rod magazine, and remember seeing a variable cam sprocket for a SBC and SBF. I'll see if I can find it.)
There's really two types of Variable valve timing. There the system that changes the valve lift and or duration (Honda VTEC), or the kind that changes the actual valve timing (BMW's VANOS). Honda's new i-VTEC utilizes both systems. The new Ford 3V motor is more closer to the VANOS system, or what Ford already uses in the Focus, the ZETEC.
From another forum.
