Originally Posted by
dougie_504
Pretty much exactly like what we were saying, only you said it differently. The SOHC VTEC doesn't effect the exhaust valves, so in what way does the SOHC VTEC effect the exhaust? It doesn't really. SOHC VTEC effects intake only.
You just have to assume that the standard exhaust flow of the SOHC D can cope with the increased flow during VTEC, which it surely can, but if you want to optimise your power output with a built head (cams, ported etc) then you'd have to worry about the standard exhaust flow and therefore oversized exhaust valves are probably an excellent idea, whereas many manufacturers believe this is not the case for the B-series.