I have just read in an old issue of Fast Fours and Rotaries about a catch can for a Datsun 1600.
I have the same problem, I have hoses from the rocker cover and block (which I dont want to run to the inlet!) and the magazine says you can run them to a catch can which allows
them to breathe in the catch can instead of polluting the clean intake charge.
Is the catch can open or is it sealed? Does this better the flow of air?
When you have to have a catch can for drags or rallies is this what they mean or is it another type of can? How does this one work?

The Catch can you will use for the street is very similiar to the guys that use them for drag racing etc, but probably with less connections and no return to the engine. I built one for
my race car using an old bullet muffler housing, welded the bottom up and installed a plug for draining purposes and put a small K&N filter on top. It is quite interesting the crap that
comes out when you drain the tank, and to think that on the standard car it is passed back through the intake!

Check this out for a picture:
http://www.geocities.com/MotorCity/Tr ... mages/tnails/thumb21.html

I've seen a really cool oil catch on on a 1200 rally car,

They got a spare 1200 rocker cover, cut it in half, welded the two halves together (and welded up one side), and put all the hoses into the breather hole. It even has the convenient
oil cap to empty it! Looks great!

I made mine using a bread dough roller (it is a plastic one that you fill with water!). Just put a hole in the lid and mesh and plugged the hoses in. [who cares as long as it works and
looks interesting l say].

thought someone would like to know anyway...