First Gen VVT Tech. The VVTs first generation uses a two-step variation that boosts the performance at two different RPMs. The first variation of valve timing is fixed for up to 3500 rpm and the other phase is the one with full load for more than 3500 rpm. (low and medium cam profile)
In summary, while VVT-i technology uses a single camshaft to adjust the valve timing, Dual VVT-i technology uses two camshafts to provide more precise control of the valve timing, resulting in improved performance and fuel economy. How Does VVT-i Work? Understanding Variable Valve Timing Technology Furthermore, VVT also broadens the torque curve before the peak, and prevents horsepower from dropping off rapidly after the horsepower peak. "With variable valve timing, we typically see a 5-10 To really see the benefit you'd need the matching ECU, or something custom to control the second ACIS valve. That would make sense, the twin throttle body has an oddly designed 2 chamber interior that seems designed to allow something like that. '99 1MZ A541e Camry @ 350,000+ Abusive Miles. '05 3MZ U151e Sienna. The main change between Perodua Viva and it's predecessors (Perodua Kelisa and Perodua Kancil) would be their engines. Then it came the term of DVVT, and Perodua claiming their 1.3l DVVT saves fuel and provide power as same as normal 1.5l engines.Let us get back to the basics, DVVT or it's full name Daihatsu Valve Variable Timing is based (copycat) on Daihatsu mother company Toyota