Oil catch can options?

[dbv8]

I am considering fitting an oil catch can to my nitrous assisted TVR Chimaera.
Despite being very fresh and healthy I believe my engine is consuming oil by ingesting it through the flame trap and back into the plenum.
This is obviously made a lot worse when using nitrous oxide and cylinder pressures are greatly increased upping the crancase pressure.
So i am thinking of fitting an oil catchcan and blocking the inlet at the plenum.

Thoughts on plumbing and options please.

How about this.... http://www.regals-motorsport.co.uk/oil-catch-tanks...

[snowmuncher]

The best catch cans have some kind of internal filtering to increase oil removal rates

The Saikou Michi is one such design

[stevieturbo]

That jap one looks a sensible design. Although one inlet may be a bit small. And also depends on actual size of the can. Also needs a return to the sump to complete it.

The regal ones look like the usual eBay rubbish.

[TheEnd]

http://www.ebay.co.uk/itm/BMW-3-SERIES-5-SERIES-PR...

Other manufacturers will have different stuff-




Pressure valve on top, vortex style separator and a drain at the bottom.

[snowmuncher]

stevieturbo said:

... Also needs a return to the sump to complete it.

It's always been my understanding one of primary purposes of a catch can is to remove the water contaminated gunk that comes out of the breather system, hence no return to the crank case

Catch Can contents (winter)

[stevieturbo]

snowmuncher said:

It's always been my understanding one of primary purposes of a catch can is to remove the water contaminated gunk that comes out of the breather system, hence no return to the crank case

Catch Can contents (winter)

And in a correctly functioning engine, ie working at normal operating temperatures, there should be no water.

If a closed system was so bad....nobody would ever install a dry sump setup.

Proper closed systems are zero maintenance and always preferred.

[garagewidow]

fit the biggest one you can,preferably with baffle plates and not a mesh filter it can clog with that gunk floating at the top in the above picture which will block the crank case pressure path,found this out with mine and blew oil everywhere.now have two inlet,one outlet and drain back down dipstick tube.never see any oil on the sight tube,so works ok.

[one eyed mick]

The oem system of dumping crankcase gasses into the inlet manifold may be green correct but a catch tank in my op is far kinder to the engine .After struggling to reduce oil leak's on a partic sweaty Pinto 2.1 I made up my own system for around a tenner result 98% reduction in leaks ,a cleaner running car and a very much cleaner garage floor I call that a win . you need a nice s/s 1 kilo sugar storage jar , oil resistant hose at least 12 mm bore and afew fittings inc a filtered cap for the tank ,an afternoon ,a few simple tools and the jobs done !

[stevieturbo]

one eyed mick said:

The oem system of dumping crankcase gasses into the inlet manifold may be green correct but a catch tank in my op is far kinder to the engine .After struggling to reduce oil leak's on a partic sweaty Pinto 2.1 I made up my own system for around a tenner result 98% reduction in leaks ,a cleaner running car and a very much cleaner garage floor I call that a win . you need a nice s/s 1 kilo sugar storage jar , oil resistant hose at least 12 mm bore and afew fittings inc a filtered cap for the tank ,an afternoon ,a few simple tools and the jobs done !

There is actually nothing wrong with venting into the intake. As long as it is done via a proper oil/air separator.

But generally the performance crowd dont like to re-circulate anything. If there really was a good effective catch can with a good internal filter etc, then I would have no issue doing it.

Few if any exist though, so it's much easier to vent to atmos. I doubt anyone will die because of it.

[Vixpy1]

Red Bull Can