I have read for awhile now about the limited travel of the B-13 suspension. This got me to wondering just what is the stock suspension travel? And does dropping the car 1.3 inches reduce it by half or more?

I've been wondering the same thing myself, although my suspension is anything but stock. I have Tokico struts, Eibach springs, and ST swaybars. The suspension had been done before I had bought the car, so I have no idea how much my SE-R has been lowered. Anyway, the supension feels like they're is hardly any travel at all. Infact, it feels (and sounds) as though the front is bottoming out when I hit a bump. I've pushed down on the corners of the car to see how many times the struts rebound and they seem perfectly fine.

I do not know the exact answer to your question, but I strongly suspect that there is not much travel with stock springs. I know of one turn on a road course where I'm *positive* I ran out of travel when stock (on AGXs). And one bumpy auto-x site (Virginia Motorsports Park), because my car did things there when stock that it never did anywhere else.

Lowering my car 1" with 350 lb/in GC spring (no plates) left it with almost no travel. I was constantly on the bumpstops. Adding the GC plates has been a wonderful decision.

I have reread Mike K's suspension articles on SE-R.net and he doesn't mention how much travel there is, but he doesn't recomend lowering more than 1.5 inches.

seems like somewhere I read stock travel was 2.5 inches.

2.5" huh? Man that's not much. But I believe it. I cannot describe how horrible the ride/handling was on my car before I got rid of the Cusco plates for GC plates. Thing is, I didn't realize how bad it was until I switched them. Suspension travel is your friend.