I have done lots of reading and it seems many people say a baffled catch can is the best design to help prevent the oil from recirculating. I have found an awesome fodel for $210.00 but don't think that is the way I'm going to go. I have also found a simpler version that does not have a baffle and I suspect this is what I will order.

Questions:
1- To make my own baffle with steel wool what exactly do I do? Do I fill the entire container with steel wool lightly packed in or do I just put a little steel wool in the bottome of the tank?

2- I have a choice of 9mm or 15mm fittings, what's the best way to go and why? I have measured the OEM tube out of the PCV and 9mm seems to be the size that most closely matches the OEM tubing thus in my mind it would save me trying to convert from OEM 9mm up to aftermarket 15mm, please advise.

Here is the unit I'm looking at.


Here is the amazing Hyperflow model.

 

1) You don't have to stuff it, but packing it so that the entire thing is filled isn't a bad idea. Not necessary, really, but not bad, either.

2) 9mm is fine. I'd replace the clear tubing they give you with some thicker tubing you can get at any auto parts store. The clear crap can close up under vacuum...esp. when it heats up.

 

who ever thought of putting steel wool in their catch can? i understand using it to help condense the oil vapor, but wtf, why would you want steel wool bits to go back into the engine?

btw, im of the strong opinion that proper oil catch cans do NOT need to have a return line to the intake manifold. i think almost all the off the shelf catch cans that are sealed are useless.

 

Steel wool will prevent sloshing. Basically it's like a baffle. I don't ever seem to be able to collect enough oil in my catch can for this to be a problem, but I wouldn't think any steel wool would ever make it back through the line into the engine.

 

thats not the reason you put material in a catch can....

 

Buddy of mine (fellow S2000 track junkie) blew shitloads of smoke during a right hander. He made his own catch can that worked perfectly.

 

Mine is filled with pieces of foam sponge (rings like large elastic bands) that came with the can (Perrin). No chance of pieces getting sucked into the intake manifold like there might be with steel wool.

 

I run an unbaffled catch can, and while it may still let some oil vapor back into the intake, it catches enough that it prevents the 'James Bond' smokescreen effect.

 

Very odd. Mine has never blown even the tiniest bit of smoke.

 

Maybe not going fast enough, or running low on oil?


You'll see it at BW going CW over magic mountain for sure with those tires (unless you go too slow of course).