Catch Can Full

[Leithy]

I recently got my 25/30 car back and thought give it a drive. 5 mins of giving it some curry my catch can was full and overflowed through the breather filter. Painted a mural in my engine bay haha. Now my main question is would a catch can with a drain back to the sump be equivalent to the head drain kits such as spool and lewis engines? I have a welded on fitting on my sump for the VCT line so I can either t-piece catch can into that or the normal turbo drain

[iruvyouskyrine]

Weld on fitting on your sump for VCT? Please explain more.

[Leithy]

I have a barbed fitting welded on the sump for my VCT oil drain

[Leithy]

This drain here goes into the sump fitting I welded on. Now T my catch can Into that or the turbo oil drain will that be equivalent to a oil drain kit they put in the back of the head. Since all I've read is that is just equals out air pressures so it drains for efficiently

[steve200b]

Vent your sump to the rocker cover or catch can

[SilverECR33]

your engine needs to breathe more, and dedicated returns to sump is a good place to start, if you piggy back that pipe you will reduce your head return and create more issues.

[RRob]

Did you put a restrictor in the VCT oil feed? This is only needed for non Neo type cylinder heads. When the VCT switches on, the head will flood with the excessive oil supplied and push out the breathers.

1.25mm is the restrictor size in the R33 RB25 block from memory.