As engine speed builds past 5,000 rpm, the VTEC system transitions to a high - lift, long - duration
intake cam profile for superior high - rpm engine power.
As engine rpm builds past 5,350 rpm, the i - VTEC system transitions to a high - lift, long - duration
intake cam profile for superior high - rpm engine power.
As engine rpm builds past 4800 rpm, the VTEC system transitions to a high - lift, long - duration
intake cam profile for superior high - rpm engine power.
The engine employs an all - new rocker arm that switches between low - and high - lift
intake cam profiles to achieve the variable - lift function.
Not exact matches
Extensive redesign of that 1.8 - liter engine (variable
intake, larger - diameter
intake and exhaust ports, higher - compression pistons, new
cam profile, new cylinder head with knock control) raises the new Miata's horsepower figure to 140.
That's a nonissue in the TL, since any coarseness is overshadowed by magnificent
intake music, especially as the valvetrain switches over to the high - lift
cam profiles at the fun end of the tach.
3 - Stage VTEC is a version that employs three different
cam profiles to control
intake valve timing and lift.
For low - rpm torque, the solenoid valve is opened near the end of the
cam profile, leading to early
intake valve closing.
By changing the phase of the exhaust
cams independently to the
intakes, engineers at Dodge were able to use the high - performance
profiles they wanted without loosing out at idle and low speed.
Above 5,800 rpm, the
intake and exhaust valves are operated by high - lift, long - duration
cam profiles, for maximum high rpm horsepower.
Gen V
Cams feature four different lobe
profiles to both create AFM compatibility and optimize
intake and exhaust valve opening / closing events.
Bottom and mid-range torque output gets a major boost thanks to 2 mm smaller throttle body, and revised
cam,
intake and exhaust
profiles.