Quote Originally Posted by Oz_Striker View Post
B18 is a 1.8 litre, B16 is a 1.6 litre. As said above you wont usually hear the VTEC crossover as much in a B18 as you will in a B16 depending on modifications due the B18 having more power down low and therefore it has a more linear power band (which basically means when you look at it on a graph the power rises more evenly in a curve), where as the B16 has less power down low and so when VTEC kicks in it there is a large jump in it's power band and so it sounds louder.
Before a tune my BB6 stock crossover was noticable in a 2nd gear pull....However after at tune it wasn't.

After tune acceleration video clips.
http://www.youtube.com/watch?v=W_y8VSA_bc4