I wasn't attempting to be rude, I just didn't know what you were talking about. Each cam might seem to have less friction but they both open the same amount of valves and push against the same amount of valve springs. As far as I understand, there is no difference in the weight of the springs from one configuration to the other. If anything, there is more effort having to turn two camshafts. You've got more bearings to push against and the rotating mass of another cam gear and cam to turn.

I also said DOHC are for more exotic applications, not that they are in some way superior. Like stated before, the ability to vary the cam timing on both the intake and exhaust cams seperately can result in extra power, but it's <5hp worth at best, and in most cases, adjusting a SOHC would match most of the gains. In a true race engine, the actual grind of the cam would be modified rather than using adjustable cam gears. However, DOHC is more expensive which obviously means it's somehow greater. If you asked anybody on this forum if you could build them engine from scratch, which configuration would you like, most of them would say DOHC. It might not have much of a basis in reality, but it helps sell cars so who cares. Just like putting 94 octane in your stock Civic's D16 isn't going to make it any faster, but people do.

OHC configurations are really a completely different animal than OHV one's. I also again don't think one is really superior to the other, just diffferent means to the same end. It's older technology (I know OHC configurations have been around just as long as OHV, just not in the same mass production number) but it's also tested and proven by V8 guys everyday. Compare them to modern OHV engine lik the C5 Corvette's, as opposed to a Harley motorcycle. Different designs for different applicatons as well.

Also, for reliabllity, I was refering to 100,000+ mile with poor maintenance reliablity rather than high rpm specifically. Like I stated above, a SOHC VTEC engine built to basically the same specifications as a DOHC VTEC engine would have the same kind of powerband, same reliabily, same high rpm potential, the problem is, Honda doesn't build them that way. Seeya.