DOHC vs SOHC

[pajerokid]

Prime example of these would be the Toyota engines...

Yung nasa Gen1 RAV4 and Corona na 3SFE, double overhead cams pero narrow angle ("F") = nasa 120+ hp.

A higher performance model, the 3SGE ("G" stands for wide angle in toyota speak) of the same engine manages more or less 180hp. DOHC po pareho yan.

My point here is that DOHC configurations in itself provides only small advantages over SOHC, mainly timing accuracy. But when placed in a wide angle valve config (which cant be done with SOHC afaik), the freer airflow shows you how much more power can be generated given that everything else is the same.