how low without a ruca

[beeracing s14]

ive got sportlines and i just couldnt resist looking at my coilovers sitting in my room. i wanna get some rucas but my friends saying that if you wont go aggressive, you can live without. so my question, how much lower can i go before the rucas are needed? sporline lowers 1.8 front and i guess 1.6 rear and this is for my s13 hatch. can i go half inch more with dmax coils?

[HYPNOTIK]

It doesn't take much to fuck up your alignment. If you lower it enough to throw your camber off say 1 degree, it's gonna throw you toe off too. It might be alright if you get an alignment. It's gonna start chewing through tires if you don't.