D15B (D15Z7) (with 3 stage VTEC)

* 3-stage VTEC
* Found in:
o 1996-1999 Honda Civic VTi EK3 and Ferio Vi
+ Displacement : 1493 cm³
+ Bore and Stroke : 75 mm X 84.5 mm
+ Rod Length : 137 mm
+ Compression : 9.6:1
+ Power : 128 hp (130 ps) @ 7000 rpm & 102 lb·ft (14.2kg/m) @ 5300 rpm
+ Valvetrain : SOHC VTEC
+ Fuel Control : OBD-2 MPFI

Honda also introduced a 3-stage VTEC system in select markets, which combines the features of both SOHC VTEC and SOHC VTEC-E.

At low engine speeds, one intake valve is opened off an economy lift cam lobe, and the second valve is just cracked open a little to help promote better swirl in the combustion chamber. Used in conjunction with a 5-wire, wideband O2 sensor, great fuel ecomomy can be realized.

At medium engine speeds, both intake valves open off the economy cam lobe with equal lift allowing the engine to produce more power, but at the expense of economy.

At high engine speeds, both intake valves are actuated by a high lift cam lobe and produce much higher performance than at the medium speed range, but at an even greater expense of economy.

The 3-stage VTEC system was only offered in the Asian and European markets and not in the US market at all.

hmm....