Hey dude i say b18c7 man i got a motor for sale =] hehehe well as i reckon b18c7 is way better then a b16b why ? b18c7 is much more torque and power at the wheels and it screems on vtec yo . i reckon b16b for turbo they do have power N/A but i dont reckonmend N/A in b16b if turbo thats alrite but if u think about it the mount of money u spend in a b16b is a waste if u want to go N/A its more worth doing a b18c7 =] (but if u are looking for a b18c7 type R motor i got one with all internals inc computer hondata s100. cheerz mate