I’m fairly new to the s2000 scene and slowly building my s2000 for the track. I’ve installed an oil catch can but I’m having some dipstick blow out. Any reason that may be? Current catch can set up is PCV>catch can>Intake. I’ve capped off the intake manifold vacuum.

 

You have reduced the valvecover / crankcase venting.

Run the catch can connection to the intake manifold vacuum, and then have the front valvecover vent running to the intake. The PCV valve won't open without suction from the intake manifold so it has to go through the catch can and the catch can connects to the intake manifold vacuum source.

 

^ he's correct. OP the routing should be PCV>catch can>intake manifold.

 

so this first photo would be the correct way to run the catch can? And the second one would be false?

 

Correct. 1st is good (must be sealed can, which it is, not an open vent like #2). Second is not necessarily false, but only operating at half efficiency. The pcv line is ineffective. It would be good if the internal ball and passage of the pcv were drilled out to create a straight through passage.

 

First pic is good, run like that. Having vacuum on the crankcase fumes will relieve crankcase pressure under the pistons. Having excess crankcase pressure will do more harm in the long term so try to get it corrected when you can. Good luck

 

I found myself sucking a ton of oil through the front line on certain tracks with the venting set up like 1, even with the VC baffle drilled, so make sure you watch for it.