it's not the problem of added weight that affects the handling, it's the fact the motor's overall size is too big to just drop it straight in, B16's and B18's are a direct drop in, and you can get some good times out of either engines. personally, i'd run an LS Turbo set up. which is the 1.8L DOHC non vtec. my friend has that in his CRX and at 11 lbs of boost he is hitting a 13.03