Crankcase breather thingie?

1. Toad Saxperience Post Whore Joined: Mar 2007 Reading Posts: 8980 French tin can

   #1 2nd April 2007, 18:38

   Hi.
   
   Please see this picture I just took:
   
   
   
   Am I right in thinking that the hot oil vapour coming out from there, is just sucked into the throttle body? If so, wouldn't it make more sense to add one of those mini filters and seperate it from the induction kit? After all, the point of the kit is to get cold air into the TB, so what's the big idea here? Or, shall I just get a catch tank?
2. Ryanp Super Moderator Joined: Feb 2004 Tonbridge United Kingdom (England) Posts: 38236 Vtr, 172, throttle bodied track slut

   #2 2nd April 2007, 18:42

   catch tank not just a oil breather filter.. that coughs shit everywhere
3. hesslevtr Saxperience Hardcore! Joined: May 2004 Hull (England) Posts: 18709 1.6 vtr

   #3 2nd April 2007, 18:43

   they put the oil vapour back in as standard for polution ans shite like that
   
   id maybe put a catch tank on it
   
   you could put a little filter on but would look tacky
4. Toad Saxperience Post Whore Joined: Mar 2007 Reading Posts: 8980 French tin can

   #4 2nd April 2007, 18:45

   OK... So I'm guessing that inducting oil vapour into the TB is not the smartest of ideas?
5. Ryanp Super Moderator Joined: Feb 2004 Tonbridge United Kingdom (England) Posts: 38236 Vtr, 172, throttle bodied track slut

   #5 2nd April 2007, 18:46

   its fine 2bh..
6. Toad Saxperience Post Whore Joined: Mar 2007 Reading Posts: 8980 French tin can

   #6 2nd April 2007, 18:47

   Please explain...
7. Ryanp Super Moderator Joined: Feb 2004 Tonbridge United Kingdom (England) Posts: 38236 Vtr, 172, throttle bodied track slut

   #7 2nd April 2007, 18:49

   Quote:

   Originally Posted by Toad Please explain...

   any minor oil vapour going into the engine will either recirculate or in some ammounts get burned off...
   
   it doesnt matter imo..
   if it would cause probs the engine wouldnt be designed like that from standard.
8. Toad Saxperience Post Whore Joined: Mar 2007 Reading Posts: 8980 French tin can

   #8 2nd April 2007, 18:55

   I get what you are saying, ta. One possibly issue though, and that is the induction kit isn't standard. I don't know if the oil vapour was chucked straight back into the TB like that before. Or even if it was, was it filtered in any way? Having cleaned the insides of the samco hosing a few times, I've noticed oil that's run up towards the TB. I'm just thinking, do you really want that crap going into the TB... For 2 reasons I suppose, 1) It clogs the butterfly up, and 2) you have a slightly different % of air / oxygen being inducted to normal, clean air.
9. Ryanp Super Moderator Joined: Feb 2004 Tonbridge United Kingdom (England) Posts: 38236 Vtr, 172, throttle bodied track slut

   #9 2nd April 2007, 18:58

   Quote:

   Originally Posted by Toad I get what you are saying, ta. One possibly issue though, and that is the induction kit isn't standard. I don't know if the oil vapour was chucked straight back into the TB like that before. Or even if it was, was it filtered in any way? Having cleaned the insides of the samco hosing a few times, I've noticed oil that's run up towards the TB. I'm just thinking, do you really want that crap going into the TB... For 2 reasons I suppose, 1) It clogs the butterfly up, and 2) you have a slightly different % of air / oxygen being inducted to normal, clean air.

   as standard it recircualtes into the induction system.
   its why most aftermarket induction kits come with the little nozzle to attach the breater pipe to recirculate.
10. KamRacing Saxperience Addict Joined: Nov 2006 A farm shed in Aylesbury Posts: 14916 Corolla AE86 Peugeot 205 B18C (in bits)

    #10 2nd April 2007, 19:15

    Quote:

    Originally Posted by Toad OK... So I'm guessing that inducting oil vapour into the TB is not the smartest of ideas?

    it is if you want to save the planet but not if you are building a performance engine.
    
    The oil vapour lowers the octane of the fuel hurting power output.
    
    There is a reason why all race cars route the vapour to an oil catch tank then vent to atmosphere
11. Ryanp Super Moderator Joined: Feb 2004 Tonbridge United Kingdom (England) Posts: 38236 Vtr, 172, throttle bodied track slut

    #11 2nd April 2007, 19:16

    Quote:

    Originally Posted by KamRacing it is if you want to save the planet but not if you are building a performance engine. The oil vapour lowers the octane of the fuel hurting power output. There is a reason why all race cars route the vapour to an oil catch tank then vent to atmosphere

    it wont do any damage to the engine itself by running it there though..
    
    catch tank is deffo the best option and can be made cheaply
12. Toad Saxperience Post Whore Joined: Mar 2007 Reading Posts: 8980 French tin can

    #12 2nd April 2007, 19:26

    Thank you all for the answers. I'm glad I've got a better understanding of this now.
13. KamRacing Saxperience Addict Joined: Nov 2006 A farm shed in Aylesbury Posts: 14916 Corolla AE86 Peugeot 205 B18C (in bits)

    #13 2nd April 2007, 21:30

    Quote:

    Originally Posted by Itsafastworld85 it wont do any damage to the engine itself by running it there though..

    it won't damage the engine no.. but you will lose power.
14. manc Established Member Joined: Dec 2004 Derby Posts: 1945 Pug 207

    #14 2nd April 2007, 22:19

    When I get round to it I will be fitting a catch tank to catch the excess oil & vapour from the rocker breather (VTR), I have first hand experience of rocker breather filters leaking oil over the shop
    
    This is what I intend to buy, Ebay catch tank.
    
    I need to investigate what size hose/length etc is supplied along with best postion to mount it but this seems to be the best solution to this problem.
    
    ManC
15. rushy_23 Saxperience Hardcore! Joined: Aug 2004 West Mids Posts: 15392 '98 EK9 N1

    #15 2nd April 2007, 22:24

    Anyone have any pics of this catch tank?
    Im not actually sure what it looks like/does if that helps?
16. KamRacing Saxperience Addict Joined: Nov 2006 A farm shed in Aylesbury Posts: 14916 Corolla AE86 Peugeot 205 B18C (in bits)

    #16 2nd April 2007, 22:31

    the oil vapour condenses inside rather than splattering all over the engine bay..
17. Toad Saxperience Post Whore Joined: Mar 2007 Reading Posts: 8980 French tin can

    #17 2nd April 2007, 22:58

    I don't know a whole lot about these catch tanks. Can anyone help recommend one for my car? Many thanks.
18. Toad Saxperience Post Whore Joined: Mar 2007 Reading Posts: 8980 French tin can

    #18 3rd April 2007, 13:53

    Anyone at all?
19. Sean Saxperience Post Whore Joined: Feb 2005 St Andrews United Kingdom (Scotland) Posts: 7384 Green mk1 vtr/s and Focus zetec

    #19 3rd April 2007, 14:22

    whole host of them on fleabay, just type in 'catch tanks', one from about £35-£50.
20. Toad Saxperience Post Whore Joined: Mar 2007 Reading Posts: 8980 French tin can

    #20 3rd April 2007, 15:04

    OK, ta. Will have a good butchers.
21. Scottp Administrator Joined: Dec 2002 Glasgow United Kingdom (Scotland) Posts: 26097 Chelski Traktor

    #21 3rd April 2007, 16:17

    or just be ultra hard core and route it into the top side of a coke bottle and drill a hole in the bottle top and stick on a breather filter. One hell of a cheap catch tank
22. gary_j L-plater Joined: Jan 2007 Truro, Cornwall Posts: 61 106 GTi

    #22 3rd April 2007, 18:10

    sorry not trying to hi jack the thread but i have a 106 gti with a catch tank and filter,and the oil vapour doesnt condense in the catch tank - it comes out of the filter. anyone no why this is?
    
    thanks gareth
23. rushy_23 Saxperience Hardcore! Joined: Aug 2004 West Mids Posts: 15392 '98 EK9 N1

    #23 3rd April 2007, 21:30

    Okay is this a catch tank:
    
    
    
    If it is, then I still have no idea how its going to look in the engine bay!
24. Sean Saxperience Post Whore Joined: Feb 2005 St Andrews United Kingdom (Scotland) Posts: 7384 Green mk1 vtr/s and Focus zetec

    #24 3rd April 2007, 21:47

    yes rushy that's a catch tank, that's why it says 'oil catch tank' on the wrapper
    
    bottom right of the pic:
25. rushy_23 Saxperience Hardcore! Joined: Aug 2004 West Mids Posts: 15392 '98 EK9 N1

    #25 3rd April 2007, 21:48

    The silver circle doodaar thing?
    Thanks Sean, very knowledgable as usual.
26. Sean Saxperience Post Whore Joined: Feb 2005 St Andrews United Kingdom (Scotland) Posts: 7384 Green mk1 vtr/s and Focus zetec

    #26 3rd April 2007, 22:09

    yes the circular thing, obviously if you had an enclosed air filter you'd have to move it a bit but you get the idea.
27. Predator_R32p Super Moderator Joined: Mar 2003 Durham (England) Posts: 37932 1. AX 2. Mk2 Saxo VTR 3. MK4 R32 DBP

    #27 3rd April 2007, 23:07

    so would you have to put a filter on the other pipe sticking out??
    
    like pipe going to breather from catch tank and filter on the other one??
28. Sean Saxperience Post Whore Joined: Feb 2005 St Andrews United Kingdom (Scotland) Posts: 7384 Green mk1 vtr/s and Focus zetec

    #28 3rd April 2007, 23:26

    think so yes or you could leave it like that one
29. Predator_R32p Super Moderator Joined: Mar 2003 Durham (England) Posts: 37932 1. AX 2. Mk2 Saxo VTR 3. MK4 R32 DBP

    #29 3rd April 2007, 23:36

    i would have to put a filter on for piece of mind, there quite simple really, dont think theres any point in having one on a VTR is there ??
30. Sean Saxperience Post Whore Joined: Feb 2005 St Andrews United Kingdom (Scotland) Posts: 7384 Green mk1 vtr/s and Focus zetec

    #30 4th April 2007, 00:14

    not really but they look nice if you're into the bufty side of things
31. Predator_R32p Super Moderator Joined: Mar 2003 Durham (England) Posts: 37932 1. AX 2. Mk2 Saxo VTR 3. MK4 R32 DBP

    #31 4th April 2007, 00:24

    lol a may get one when i run out of ideas
32. Toad Saxperience Post Whore Joined: Mar 2007 Reading Posts: 8980 French tin can

    #32 4th April 2007, 07:54

    Quote:

    Originally Posted by gary_j sorry not trying to hi jack the thread but i have a 106 gti with a catch tank and filter,and the oil vapour doesnt condense in the catch tank - it comes out of the filter. anyone no why this is? thanks gareth

    
    I don't think they actually condense anything. They are there just to catch oil if your engine fooks up. So, you're not really doing any good for the enviroment... Someone please correct me if I'm wrong!
33. Toad Saxperience Post Whore Joined: Mar 2007 Reading Posts: 8980 French tin can

    #33 4th April 2007, 07:56

    On the plus side for us however, performance should be improved.
34. KamRacing Saxperience Addict Joined: Nov 2006 A farm shed in Aylesbury Posts: 14916 Corolla AE86 Peugeot 205 B18C (in bits)

    #34 4th April 2007, 07:58

    there should really be baffles inside for the air to move around as you want the oil and air to separate before it reaches the filter. I made one and used those metal wire wool scouring brushes inside.
    
    Worked fine.