cruising in VTEC range
Originally Posted by rocrfella,Oct 25 2007, 04:36 PM
Second cam?
Both cam are always working. When you hit VTEC, the intake values stay open longer. Not the second cam.
Both cam are always working. When you hit VTEC, the intake values stay open longer. Not the second cam.
There are actually three cam lobes for each pair of valves. Two canSHAFTS total, one for the exhaust side, and one for the intake side, 12 cam lobes per shaft. For each pair of valves, the central rocker and lobe are inactive until VTEC engages. At that point pins lock all three rockers together so they all three follow the profile of the central lobe. In an F20C, the two lower RPM cam lobes for each intake valve pair have staggered timing, but in the F22C they have identical timing. As far as I'm aware, this stagger only applies to the intake valves, and is used to promote swirl.
To keep it simple just think of the valve lift and duration changing when VTEC engages or disengages.
To keep it simple just think of the valve lift and duration changing when VTEC engages or disengages.
Like any machine (including humans) the harder you run it the more wear and tear. On the S2000, once VTEC is engaged it is no different than running a Vette at 6000 RPM for a while.
Originally Posted by Chrisbert,Oct 25 2007, 02:18 PM
Like any machine (including humans) the harder you run it the more wear and tear. On the S2000, once VTEC is engaged it is no different than running a Vette at 6000 RPM for a while.
BTW, why is running a Vette at 6000 RPM is the same as engaging VTEC? I don't see your point in this statement.
Originally Posted by rocrfella,Oct 25 2007, 05:34 PM
Wrong analogy. Human beings are different from machines. I guess you have never heard of "bodybuilding".
BTW, why is running a Vette at 6000 RPM is the same as engaging VTEC? I don't see your point in this statement.
BTW, why is running a Vette at 6000 RPM is the same as engaging VTEC? I don't see your point in this statement.
Oh, yes I've heard of bodybuilders. I've also seen bodybuilders with blown knees, torn muscles, etc. Are you suggesting that the longer and harder I run my S2K the stronger it will get? Wow, you should patent that!







