beats me, I don't drag race. You shouldn't just "dump" the clutch tho.
If you want a LSD with your B18B, you'll need a separate transmission(not the tranny that came with the B18B). You'll need either a JDM tranny that came with the LSD (it was optional in Japan) or an ITR transmission. LSD was optional on japanese B16As... So just look out for that when youre shopping for a tranny.