Originally posted by sick79
i may be mistaken, but isnt the i-vtec in the si and base rsx similar to the sohc vtec found in civics? and when i say similar, i mean the vtec function is more of a fuel economy and good emissions version of vtec. rsx-s has the low and high performance lobes on the cams,=(high output vtec).
First of all read the link I posted a few posts up and that should explain the differences.
If not, then basically the difference in the systems used on the Si/RSX and the RSX-S is that the RSX-S switches the cam profiles on both its intake and exhaust cams while the RSX/Si switches only its intake cam profile. So in a sense, yes, it is kind of like the difference between SOHC VTEC and DOHC VTEC in terms of its functionality, but it is still a DOHC motor either way.