B18c1- great torque, great HP. good all-around motor. takes to mods very well. compared to the b16, its everything the 1.6 isnt. good throttle response, good low end torque. high compression though. keep boost low. even with low boost, some impressive numbers should be possible. has different cylinder head design than the other b-series vtecs. has dual runner intake system, which switchs runner length with rpm. wasnt as great as everyone thought it would be. has higher compression than other B-heads, due to large quench pads in combution chamber. these also help fend off detonation, but that might be too advanced for this post, so ill leave it at that. only drawback is cost. swaps go for about 50% more than a b16 swap.