Hey guys, I have my new engine sitting here and I was wondering where to plumb the catch can return into? I want the catch can sitting under the plenum so it is hidden a bit. I see there is a bolt hole left of the oil filter? It is probably too high though. My other option is to run it into the drain I have from the back of the head. This line will run right under the can. The only problem will be the cost of teeing into the -10 braid as the t's and fittings wont be cheap! Is that my best option though? Thanks

Hey mate... RB30 has 2 dipstick tubes...one is blanked off at the rear of the sump on drivers side...we knocked the blank out and I stuck a cut down dipstick tube in there...I have my catch can where the charcoal canister used to sit...connected to dipstick tube with some rubber hose and clamps...no problems so far...

Quote: Originally Posted by NSNPWR Hey mate... RB30 has 2 dipstick tubes...one is blanked off at the rear of the sump on drivers side...we knocked the blank out and I stuck a cut down dipstick tube in there...I have my catch can where the charcoal canister used to sit...connected to dipstick tube with some rubber hose and clamps...no problems so far... Thats a top idea for guys wanting to plumb there catch cans back in. What are the pros and cons of doing this by the way? Plumb back vs Sealed and drain away

I currently have a mountain dew bottle poverty pack catch can. Its tops. But the car doesnt move so all good. Im going for the sealed version I dont think I will put the oil back in the engine rather have an indication of how much fresh oil to put back in.

Quote: Originally Posted by NSNPWR Hey mate... RB30 has 2 dipstick tubes...one is blanked off at the rear of the sump on drivers side...we knocked the blank out and I stuck a cut down dipstick tube in there...I have my catch can where the charcoal canister used to sit...connected to dipstick tube with some rubber hose and clamps...no problems so far... Is there a tapped thread there if i knock the cap off or do I have to stick a dip stick tube in there? Oh and what did you use to stick it?

No thread there, dipstick just push's in neat fit so you'll have to use the base of one of those or something of the same diameter to a hose tail.

i have it returning into my rocker cover as it sits above the motor. works a treat.

Anyone know more about the pros and cons of draining back vs sealed???

Quote: Originally Posted by KwHAT! i have it returning into my rocker cover as it sits above the motor. works a treat. Hey mate, not to sure on the logic of it, but wouldnt it just mean you have two catch lines going into the same tin? I thought the pressure of the motor would force it out of both breathers into the can. Unless it was vented wouldnt you be over pressurising.

Drain it back if possible; it reduces the pressure within the sump which allows the oil to return to the sump easier of which means less oil hanging around in the head that can be blown in to the catch can. No negatives; all positives.

RB30 always blows out the rear breather, front is bone dry, this is especially so on boosted and cammed (revvy) motors... Im going to get a rocker cover made up with 2 breather fittings in the front of the rocker cover and none up the back (block the rear one off and smooth it all over)... Can anyone see a problem with this....

Quote: Originally Posted by NSNPWR RB30 always blows out the rear breather, front is bone dry, this is especially so on boosted and cammed (revvy) motors... Im going to get a rocker cover made up with 2 breather fittings in the front of the rocker cover and none up the back (block the rear one off and smooth it all over)... Can anyone see a problem with this.... I left my pcv hose connected standard and hadd'nt got around to plumbing up the rear pipe and left it open for a day ( no mess) so I blanked it temporrarily an forgot about it for a couple of days and when I popped the bonnet the pcv hose was sucked flat?

Quote: Originally Posted by NSNPWR RB30 always blows out the rear breather, front is bone dry, this is especially so on boosted and cammed (revvy) motors... Im going to get a rocker cover made up with 2 breather fittings in the front of the rocker cover and none up the back (block the rear one off and smooth it all over)... Can anyone see a problem with this.... Rb26's have the same issue. I've seen 26's fitted with what looks like rb25 cam covers which have the breathers up front for that reason.

hey mate i drilled a hole in my oil return of turbo and welded a bit of rod and ran it back to the catch can works fine oil straight back to the sump, have to remove the turbo return line to do it but came off pretty easy

the rear breather seams to be the problem with mine aswell can i just put a air filter push in job or will the blow back be a mess?oh its a sc rb30

You will mess the bay up big time....

ok then what can i do then?cant pipe it into intake as the sc pressure will pressurise the sump etc

Run it to a catch can....

any pics guys?