Difference Between VTEC & i-VTEC
09-03-2004, 04:26 AM
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Re: Difference Between VTEC & i-VTEC
from what i understand, and i may be wrong, is that vtec is a different cam profile for the intake side only. this creates a low amount of torque but great revs and horsepower. i-VTEC has a cam profile for both intake and exhuast creating more torque. "i" stands for intelligent.
09-03-2004, 04:28 AM
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Re: Difference Between VTEC & i-VTEC
driving difference is that with VTEC you get a louder or more aggressive engagement. where i-vtec is a smoother trasition of power when engaged.
09-03-2004, 05:05 AM
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Re: Difference Between VTEC & i-VTEC
sohc cam only operates on the intake side, dohc operates both intake and exhaust as does the i-vtec. the difference is the beyond me though. maybe the timing is even more advanced.
09-03-2004, 05:20 AM
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Re: Difference Between VTEC & i-VTEC
Originally Posted by Honda-S2000
driving difference is that with VTEC you get a louder or more aggressive engagement. where i-vtec is a smoother trasition of power when engaged.
So for K-Series, you can't hear the i-VTEC engage?
09-03-2004, 05:47 AM
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Re: Difference Between VTEC & i-VTEC
straight from a Honda facts book:
the i-vtec design enhances the benefits of vtec by adding variable timing control (vtc). vtc is a hybraulically operated system that controls the phasing, or timing, of the chain-driven camshaft, advancing or retarding it on the intake cycle.
the i-vtec design enhances the benefits of vtec by adding variable timing control (vtc). vtc is a hybraulically operated system that controls the phasing, or timing, of the chain-driven camshaft, advancing or retarding it on the intake cycle.
09-03-2004, 06:36 AM
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Re: Difference Between VTEC & i-VTEC
Originally Posted by Insperation
So for K-Series, you can't hear the i-VTEC engage?
Originally Posted by Honda-S2000
its not as dramatic. the added torque makes it feel like less engagement.
Haha, have you ever heard the K-series crossover with an intake and no hondata? It is loud... The added torque is not enough to do away with the jolt of extra power in stock form, however hondata has done wonders to the midrange power through tuning the ecu with Hondata #4, or you can get hondata's k-pro which is a completely tunable ECU. With hondata the powerband is smoothed out so then I will agree with the statement because there is no noticeable transition.
09-03-2004, 06:39 AM
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Re: Difference Between VTEC & i-VTEC
Originally Posted by Honda-S2000
straight from a Honda facts book:
the i-vtec design enhances the benefits of vtec by adding variable timing control (vtc). vtc is a hybraulically operated system that controls the phasing, or timing, of the chain-driven camshaft, advancing or retarding it on the intake cycle.
the i-vtec design enhances the benefits of vtec by adding variable timing control (vtc). vtc is a hybraulically operated system that controls the phasing, or timing, of the chain-driven camshaft, advancing or retarding it on the intake cycle.