posted September 27, 2006 05:59 AM
Variable Valve Timing ? Is the VVT on the new GTR a true VVT which varies duration and lift, or is it like the Honda version which keeps two valves closed on each cylinder until a certain rpm ?
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Candy Thunder Blue 2006 ZZR1400
Stock wheelbase
Max: 205.4 mph in 1.25 miles
2012 ZZR1400 in Golden Blazed Green
Brock CT Full System. etc
Max: 203.1 in 1 mile (so far)
posted September 27, 2006 08:02 AM
the vtec on the vfr is not the vtec thats on the cars
true vtec which i was talkin about months ago should give a
10% increase in power. cam timing and valve timing
optimised at all speeds is the way to go.
advance timing at low speeds retard at high speeds
It's is probably the VTEC mechanism that Honda has patent on, not the act of closing one intake and one exhaust valve at certain speed. This could be done in many different ways. Having said that, hope KMC did not waste their time trying to build a better VTEC system. The concept itself is flawed.
As Supra said, continuous valve timing of all valves throughout the entire engine RPM range would produce much greater and optimal performance.
posted November 02, 2006 05:00 AM
the clue in the name is variable valve TIMING. My bet is one cam is driven by the chain from the crank and has a mechanical advancer which drives the other cam, which varies the valve timing of the second cam as the rpms increase.
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posted September 27, 2006 05:59 AM
