Originally Posted by XCM828
But the Civic HX's VTEC-E mechanism results in 115hp, versus 106hp from the Civic DX.
However the original VTEC-E lagged 10 horsepower behind the DX.
D15B7 (SOHC): 102hp
D15Z1 (SOHC VTEC-E): 92hp.
I would like to know what it is about the later VTEC-E that gives it a boost in output though.