the gsr b18c1 or type R b18c3 not the b18B(the ls motor) i like the vtec but you could always do an ls/vtec setup. i just prefer the b18c's because i have friends who drive them and I'm more comfortable working on them I've never done anything w/ an ls except minor bolt ons to another friend of mine but their pretty quick too, but not as the b18c1 my other buddy has. Yeah if you want a little boost w/ no build thats cool, but if you go over 8lbs be careful and build the motor fo sho.