I hear advantages/disadvantages of shaving the head on a D-series motor. I assume this increases compression due to the slightly smaller volume available to the cylinder chambers. This in turn increases horsepower and only slightly increases torque.
Example: D16A6 SOHC 1590cc 105@6000rpm 98@5000rpm 9.1:1cr ZC DOHC 1590cc 130@6,800rpm 106@5,700rpm 9.5:1cr (is this engine stroked or is the head different?) Granted, the ZC has better cam profiles since there are two cams and this helps increase power. Overall, doesn't this increase engine heat and engine wear due to the higher kinetic energy and is it fair to say higher compression engines wear faster? George '89 DX-Hybrid-D16Z6, 127k miles "Seats, Suspension, Engine, MSD, next=heat reduction!"
