Ok, here is the scoop on the cam gears for the ZC. They DO NOT automatically adjust themselves. B16 cam gears are the same number of teeth and are 100mm diameter, just like the ZC cam gears. 86-89 Integra cam gears are 120mm diameter and about 20 teeth (or cogs) more, so they will not fit. The B16 cam gears need to be machined about 2mm off the back side of the cam gear so that the belt will line up properly otherwise the belt will ride a little off the back side of the cam gear. I have the Venom Fang cam gears on my ZC and that is what I had to do to make them fit. This was all done with the motor out of the car so I had plenty of time to make sure everything fit before I installed the engine. Here are the part numbers for cam gears that will fit the ZC.....
Venom - C10-125 - 1990 - 99 Integra - All DOHC
AEM - 23-602 - 1990 - 00 Integra - DOHC
1999 - 00 Civic Si - DOHC
1988 - 91 Prelude - B20-21
This list was pulled from both parties websites, so it is correct. I heavily researched this for months before getting the Venom cam gears. By the way, the actually do work. I have not dyno'd the motor yet, but it helped with off the throttle response. Hope this answers everyone's questions.....
