HONDA V-Tec Operation
HONDA V-Tec Operation
Get the book here: https://www.createspace.com/4321251
Describes the operation of the HONDA V-Tec variable valve timing system.
Like never seen before, this animation goes into details on the mechanical
principle of the V-Tec system. The Honda V-Tec system is a dual setting
variable valve timing system. It is meant to give high efficiency and low
power at lower RPM and high power and low efficiency at higher RPMs. There
have been a few incarnations of V-Tec, which came out in the late 80's, but
their principle is the same. See it all here with high quality visual
Amazon Printed-Books & Kindle:
Google Play Android APPs:
Amazon Video DVDs:
Barnes & Noble Nook:
Apple iTunes iPad:
How VTEC Sound Like
This is what VTEC should sound like. The crossover to the high cams should
be linear without any power loss. My car was tuned to make maximum power
across the RPM range. This was done in 4th gear.
I Dynoed 210whp &
154wtq on a Dynojet.
Car: 2008 Honda Civic Si FG2
Tune: Hondata FlashPro
VTEC kicks in at 4k RPM all the way to a redline of 8.6k RPM.
"VTEC (which stands for Variable Valve Timing and Lift Electronic Control)
is an electronic and mechanical system in some Honda engines that allows
the engine to effectively have multiple camshafts. As the engine moves into
different rpm ranges, the engine's computer can activate alternate lobes on
the camshaft and change the cam's timing. In this way, the engine gets the
best features of low-speed and high-speed camshafts in the same engine."
Here is my Civic's record at the drag strip:
B16 Turbo @ 9000Rpms
Please watch my other vid on higher Boost.
Engine / turbo specs:
Wiseco pistons 9,0:1
Eagle H-beam(100% balanced)
Stock B16 head
Hondata intake gasket
APE 3" downpipe
APE Screamerpipe 38mm
XS power T04e turbo
XS power "Tail" wastegate 38mm
Boost at 6psi
Tuned by van Drie Tuning with eCtune
Hulk Civic 80-260km/h
Oem sleeves - Manley I beam turbo tuff
rods - CP flat top pistons
Oem K20A nitrit crankshaft
Inline pro head with toda spec C cams
Dual bosch 044 pumps
93 octane pump gas
19 psi on Boost
Mfactory pro 6 speed gear set with Mfactory FD and hellical lsd
Loud vtec sound
Just a small ride with my Honda civic
Not check engine light but low level winsheld washer!!!!
SEE MY OTHERS VIDEO
thanks for your comment
How VTEC works
The DOHC i-VTEC system (one of the two cams shown). Found in the
Honda/Acura K series, F20C and F22C1 engines, the i-VTEC system uses roller
rockers, continuously variable intake cam timing (VTC, not shown) and three
separate cam profiles for both the intake and Exhaust valves of each cylinder. These features
improve power and efficiency of the engine across its entire rpm range.
Below 5,800 rpm the offset and low lift of the valves aids in fuel
atomization. This provides improved low end torque and fuel efficiency by
creating a powerful swirl in the cylinder and by keeping the intake air
charge at high velocity. Above 5,800 rpm a high lift, long duration cam
profile is engaged by the synchronizing pistons to provide greatly improved
high rpm power and torque.
How Vtec Works "Full Description"
In this video I explain step by step how the vtec system works and what
causes it to function.
I also explain the difference between DOHC Vtec & SOHC Vtec
Help Support My Channel:
Visit me at: http://www.Nthefastlane.com