1. VTEC will not mess up your engine, Honda designed your engine for VTEC, therefore it will work very well. You are more likely to **** up your engine with Nitrious since your engine was not designed to have that.

2. VTEC controllers only help of your engine is modified such as more agressive cams, it will allow you to select when you want VTEC to kick in, this is good if you have tuned the engine because you can have it kick in right where the powerband starts to edge off.

3. If you had a B16A and ZC both making the same power I would probably say ZC car would win because its a lighter engine and the car doesn't need VTEC to make that power.

4. HANDS DOWN there are more parts made for the B16A then any other Import engine ever made. The ZC parts market is scarce.