[sperry]

One catch can is possible, if you size everything properly with the lines. However, after about 6 different attempts, I can't get either one or two cans to work. Of course my situation is a little different, as I'm dealing w/ a ton of blow-by pressure, an unusual oil-breather configuration, and massive lateral-Gs on the race track.

However, in general, the "best" setup is to run two cans. One in between the valve cover breathers (after the T) and the intake on 3/8" hose, and one in between the crank case breather (after the PCV) and the intake on 1/2" hose. Unfortunately, none of the kits really provide you with everything you need to do it right, you'll have to do some work putting together a real solution, but if you're planning to build your own, you can do it right.

The question is, why do you think you need a catch can? Are you seeing oil in your intake? Does the car see high lateral-Gs? Are you drag racing, or otherwise winding the motor out to high loads/rpms on a regular basis? For the most part, a catch can on a street driven car is really just bling... or at most, for piece of mind. It's not really necessary, and they can be quite a bit of work to get right. I know on my car it's been a *huge* hassle to get them setup properly... but like I said, I'm fighting a bit of a different issue than a mostly stock car would have (my blow by pressure pumps oil out the valve cover breathers under hard cornering).