garetheves Posted December 1, 2006 Share Posted December 1, 2006 Dont know the technical name for it and im afraid its not the best or clearest of pics but its the only one i have on my works computer. Its a small air filter and rubber tubing that connects to the exhaust cam. Theres a second one at the back of the intake manifold as well. Anyone know where i can get one, need the rubber tubing as well?? Link to comment Share on other sites More sharing options...
ajazyasin Posted December 1, 2006 Share Posted December 1, 2006 Go to K&N's lists online and get the part no. Then go to any dealer in K&N and get it ordered in. The online lists have all dimensions of filters. goodluck:) Link to comment Share on other sites More sharing options...
garetheves Posted December 1, 2006 Author Share Posted December 1, 2006 Go to K&N's lists online and get the part no. Then go to any dealer in K&N and get it ordered in. The online lists have all dimensions of filters. goodluck:) Will it come with the rubber tubing do you think as this has split. Cheers Link to comment Share on other sites More sharing options...
ajazyasin Posted December 1, 2006 Share Posted December 1, 2006 To be honest, I'm not sure. I take it you are talking about a tube that goes from the filter to the camcover? try the top few: http://www.knfilters.com/search/univround.aspx Link to comment Share on other sites More sharing options...
garetheves Posted December 1, 2006 Author Share Posted December 1, 2006 Yeah been to the web site and seen the one i need, just need to measure the flange diameter when i get home. Yeah its the tube between the cam and the filter. Doubt it will come with one, might just have to use some ordinary silicone hose if not. Link to comment Share on other sites More sharing options...
Alex Posted December 1, 2006 Share Posted December 1, 2006 Gareth, Look up breather systems. You don't want a filter there...you want a boss welded to your intake pipe and a hose run from the breather to the intake. Actually I'd get a longer intake pipe while your at it, to move the intake further away from the engine heat. THe K&N's come with a rubber hose fitting. it's about 1/2" there. Link to comment Share on other sites More sharing options...
garetheves Posted December 1, 2006 Author Share Posted December 1, 2006 Gareth, Look up breather systems. You don't want a filter there...you want a boss welded to your intake pipe and a hose run from the breather to the intake. Actually I'd get a longer intake pipe while your at it, to move the intake further away from the engine heat. THe K&N's come with a rubber hose fitting. it's about 1/2" there. Whats the advantage of this, excuse my technical ignorance, but surely the air coming from the intake pipe will be just as good as from the filter on the cams, or is it a question of heat?? Link to comment Share on other sites More sharing options...
Alex Posted December 1, 2006 Share Posted December 1, 2006 It's a question of your breather system working or not. The cam covers should see less than atmospheric pressure and have gasses etc sucked out of them, your system sees atmospheric pressure or more building up and vapours than need to be removed still left in place. It's not a question of filtration or heat it's negative air pressure that must be restored. Link to comment Share on other sites More sharing options...
garetheves Posted December 1, 2006 Author Share Posted December 1, 2006 It's a question of your breather system working or not. The cam covers should see less than atmospheric pressure and have gasses etc sucked out of them, your system sees atmospheric pressure or more building up and vapours than need to be removed still left in place. It's not a question of filtration or heat it's negative air pressure that must be restored. So why do these single kits come with the filters?? Just having a read through Digsu's breather system info now, lets see if i understand it Link to comment Share on other sites More sharing options...
garetheves Posted December 1, 2006 Author Share Posted December 1, 2006 So you would recommend a breather system with a catch can to remove the excess oil?? Link to comment Share on other sites More sharing options...
Dragonball Posted December 1, 2006 Share Posted December 1, 2006 So you would recommend a breather system with a catch can to remove the excess oil?? It's what Gaz runs on his m8 - and appears to be succesful... Link to comment Share on other sites More sharing options...
Alex Posted December 1, 2006 Share Posted December 1, 2006 You don't *need* a catch can...but yes that's the gist of it Link to comment Share on other sites More sharing options...
garetheves Posted December 1, 2006 Author Share Posted December 1, 2006 It's what Gaz runs on his m8 - and appears to be succesful... From looking at a pic of the Envy engine bay i can see the following, a pipe coming from each of cam breather chimneys to a catch can, and then another pipe coming from the catch can, but cant see where it goes to, is this the one that then attaches to the intake pipe after the filter??? Once again excuse my lack of technical knowledge. Also if you bought a catch can, does it come with all the piping included or is the "Breather system" a seperate part altogether?? Cheers. Link to comment Share on other sites More sharing options...
garetheves Posted December 1, 2006 Author Share Posted December 1, 2006 You don't *need* a catch can...but yes that's the gist of it Surely you need a way of removing any excess oil that may still be in the gases?? Link to comment Share on other sites More sharing options...
Alex Posted December 1, 2006 Share Posted December 1, 2006 There shouldn't be excess oil if there is your piston rings are probably knackered! The Envy unit plumbs into the underside of the intake pipe (pre turbo) Link to comment Share on other sites More sharing options...
garetheves Posted December 1, 2006 Author Share Posted December 1, 2006 There shouldn't be excess oil if there is your piston rings are probably knackered! The Envy unit plumbs into the underside of the intake pipe (pre turbo) Hmmm, think ill be getting my local garage to fix me a flange onto my intake then at some point, the catch cans do look bling though lol Link to comment Share on other sites More sharing options...
Alex Posted December 1, 2006 Share Posted December 1, 2006 Thinking about it...I wouldn't put the pipe into the underside if you don't have a catch can as oil could pool in the U bend of the hose.... If you just us a hose it should come in to the intake at downward angle. Link to comment Share on other sites More sharing options...
garetheves Posted December 1, 2006 Author Share Posted December 1, 2006 Thinking about it...I wouldn't put the pipe into the underside if you don't have a catch can as oil could pool in the U bend of the hose.... If you just us a hose it should come in to the intake at downward angle. Ill look into it cheers. Might just get a catch can anyway if one comes up fairly cheap, its not going to harm it. Link to comment Share on other sites More sharing options...
Ian C Posted December 1, 2006 Share Posted December 1, 2006 There is a good thread about breather systems in tech at the moment. The cam cover actually vents crankcase gases out, not sucks air in. Connecting it to the intake pipe pre-turbo provides a vacuum source at high engine loads which helps depressurise the crankcase and save your oil seals. A small amount of oil vapour will come with it, but nowhere near enough to worry about. You probably have some oil smearing down the side of the cam cover from the little K&N which is this oil vapour carryover. One minor drawback of this is that if your engine lets go at high speed it may cough a lot of oil out via that breather filter onto the exhaust manifold The turbo kits come with them as they are ok-ish as a solution and a lot easier to package and fit than a welded boss on the intake pipe. But they never offer a vacuum at high load to help evacuate the crankcase of blowby gas just when that gas pressure is at it's highest - this can blow seals. -Ian Link to comment Share on other sites More sharing options...
garetheves Posted December 1, 2006 Author Share Posted December 1, 2006 There is a good thread about breather systems in tech at the moment. The cam cover actually vents crankcase gases out, not sucks air in. Connecting it to the intake pipe pre-turbo provides a vacuum source at high engine loads which helps depressurise the crankcase and save your oil seals. A small amount of oil vapour will come with it, but nowhere near enough to worry about. You probably have some oil smearing down the side of the cam cover from the little K&N which is this oil vapour carryover. One minor drawback of this is that if your engine lets go at high speed it may cough a lot of oil out via that breather filter onto the exhaust manifold The turbo kits come with them as they are ok-ish as a solution and a lot easier to package and fit than a welded boss on the intake pipe. But they never offer a vacuum at high load to help evacuate the crankcase of blowby gas just when that gas pressure is at it's highest - this can blow seals. -Ian An interesting read. Link to comment Share on other sites More sharing options...
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