I know this has been asked plenty of times before but couldnt find a thread with a difinitive answer when i searched? I'm currently going down the forged 2.5 route including a 321t+ and am fitting a catch can, just reallyt wanted to know what the preferred method of pipe routong was? and can the rocker cover breathers and the main crank case breather be routed to the same catch can? Thanks in advance, Neil.

 

Yep, route all three to the catch can. The crank breather has a 'T' in it, and goes to the inlet pcv, as well as the intake. Remove the 'T', block the pipe that goes to the pcv under the throttle body, and route the crank breather to the catch can.

 

I have VTA'd the cam cover breathers, and plumbed the crankcase breather in to a Mocal catch can

 

I vta'd all the breathers, blocked the pcv and had no problems/oil for 6 months!

 

Thanks for the replies, so there wont be any problems if i t the rocker breathers and take the to the catch can and also the crank breather with the one vent from the can with a filter on it?