I'm about to install some lowering springs on my 92 Civic h/b that will drop the car 2.3 inches. I've read that one washer should be used for each inch dropped when doing the rear camber fix. My question is, since my drop will be very close to 2.5 inches, should I use 2 or 3 washers?

two washers then a thin one :D (seriously though)

good idea, never though about doing that. Thanks :)

or you could put on 2 then use the level and see how far it's off then put on 3 and see how far it's off and go for whichever one is closer.

i have almost a 2 inch drop and i used one

Which would be better, to use one too many washers, or one less then ideal?

2 should be fine, I'm dropped about 3 and it's fine for me.

I would suggest 2 washers cause some negative camber is good for cornering. Postive camber (tops of the tires sticking out) is bad for handling.