ls is better, or can produce more power if you are just talking boosting a stock motor. If you decied to do block work etc. then really it comes down to who wants to spend more money, not which motor. Each is capable of making loads of power. If you are going to build the bottom, I say get the b18c1, but if you are just gong to boost the stock block, I would say buy a cheaper b18b, and boost it. The b18b with the turbo should only cost like 1k more than a b18c1 with out turbo, so if you are on a tight budget then I would say go that rout. Really it all depends on your plans, and your budget, so like stated above there are too many variables that come into play as to which motor would be best. But as far as bang for the buck, a b18b with a turbo is a pretty fun setup. And as for weight. The integra weighs roughly 2600 pounds giver or take a few.