The D16A1 (86-89 USDM Integra) was also a ZC pattern DOHC D-series.
Originally posted by Bakeoff
It's probably the d15z1. It's basically a 130hp sohc vtec. Almost the same as the Z6, but it's a 1.5...
The D15Z1 VTEC-E head is very different from the D16Z6 VTEC head. The Z1 head uses 12 valves at low RPM, and all 16 at high RPM. At low RPM, the four extra valves open only enough to prevent fuel pooling on the valve. VTEC-Economy was ment to save gas, not win races
