Quote Originally Posted by badkuk
i read an article about the vios lately, and read a comment that the VVTi engine si more tunable than the iDSI.

i'm not really sure what the writer meant. does it simply mean that you can coax more hp from a VVTi rather than an iDSI? or is it easier to tune a VVTi?
It's a common mistake to judge the power of an engine by HP alone. Torque is just one of the other factors. If you want to read about iDSI, try this link Honda's L-Series Engine. It also shows the difference between iDSI and VTEC. Hope it helps.