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View Full Version : Breathers / Catch Tanks

BassAddict
03-10-2003, 07:27 AM
Hi all !
Forgive me if I'm being a bit thick :? but does anyone have any good sites I can look at, or a few good pics/diagrams that explain how you install catch tanks - I hear alot of peope mention them, and see them on a lot of cars but I haven't got a clue how they fit in to everything !!
Cheers,
rich
Mark D
08-10-2003, 12:06 PM
I've been talking to the chaps at mardi gras motorsport about this subject. i dont have a catch tank, i've just put a small K+N filter onto the cam cover breather.
Mardi gras have said that the vtecs can chuck out a substantial amount of oil especially when taking long left hand bends at speed.
They recommended that i pipe the breathers into a catch tank which is vented inorder to prevent pressurisation and then to fit a return from the bottom of this back to the sump. Seems a bit overkill for a road motor but their the chaps with more experiance than me so who am i to argue
BassAddict
09-10-2003, 10:28 PM
Hi Mark - where about are Mardi Gras ? I've seen a US site that mentions tapping extra breathers into the cam cover - not sure if this helps any ! I still need to figure out where everything connects to - seen some really tidy installs - I take it there quite a few pipes etc that you can just block off - a mate with a vauxhall engine did quiet a bit of blocking things off ??!!
Rich
DarrenW
28-01-2009, 03:38 PM
That is brilliant that you are moving forward with the build.

Hats off to you Bassaddict :wink:
Purtsi
28-01-2009, 05:00 PM
wow.. you sure did find an old topic ;)
mininut
28-01-2009, 06:39 PM
That is brilliant that you are moving forward with the build.

Hats off to you Bassaddict :wink:

PMSL :lol: :lol: or are you trying to tell Rich something :wink:
evolotion
28-01-2009, 07:08 PM
rich, your going to have to have a BBQ/party when you hit the 10 year marker :lol: :oops:
BassAddict
29-01-2009, 12:14 AM
Sorry guys - not even been to the garage in ages other than to get stuff to take to the house I'm renovating - doubt i'll get to work on it for atleast 6 months the way its going :cry: Will be about 2 1/2 - 3 years by then since I last got time to work on it :( !!!!!
Rich
rug
29-01-2009, 01:36 AM
I have found some good info on honda-tech.com about catchtanks/baffles and ventilating the crankcase.

Anyway, I am too drunk and too far from home (barcelona) to actually link to something useful... but search and you will find usefull stuff. I belive that the crankcase should be connected to the catchtank and the valvecover should be the filtered side or just connected to the intake (unless you only to offroad. Not environmentally friendly...) and you can just put a filter on the valvecover/catchtank side).

If that makes sence :lol:

guiness + glenlivet :lol:

good night...

/Carl
B20GT
29-01-2009, 01:49 PM
The best way to get rid of the excess vapour released into the Catch tank is to plumb it into a ventri in the exhaust stream appx 1' from the exh manifold, this will scavenge the crancase for you and expell the gasses in a controlled manner to the back of the vehicle, and not under the bonnet, where the noxius gasses tend to find thier way into the drivers compartment (Second Hand Smoking Kills!) :lol: That is my concern when I see people just whacking breather filters under the bonnet.

Regards Scott G
Marcus Nordblom
29-01-2009, 01:59 PM
The best way to get rid of the excess vapour released into the Catch tank is to plumb it into a ventri in the exhaust stream appx 1' from the exh manifold, this will scavenge the crancase for you and expell the gasses in a controlled manner to the back of the vehicle, and not under the bonnet, where the noxius gasses tend to find thier way into the drivers compartment (Second Hand Smoking Kills!) :lol: That is my concern when I see people just whacking breather filters under the bonnet.

Regards Scott G

I was thinking of this the other day after some deep reading of flattrack motorcycles, some of the bikes use this system and in some cases get a couple of extra bhp on top due to the "vacum" effect…i think there was some kind of valve installed to :? :?
B20GT
29-01-2009, 02:02 PM
PCV check Valve, same as in the intake manifold on all B series Vtecs
Remspoor
30-01-2009, 02:15 PM
http://i88.photobucket.com/albums/k198/1979remspoor/-Stuff/catch1.jpg
http://i88.photobucket.com/albums/k198/1979remspoor/-Stuff/rear_breather_tank_plumbing.jpg
http://i88.photobucket.com/albums/k198/1979remspoor/-Stuff/oemstuff.jpg
http://i88.photobucket.com/albums/k198/1979remspoor/-Stuff/catch2.jpg
http://i88.photobucket.com/albums/k198/1979remspoor/-Stuff/catch3.jpg
B20GT
05-02-2009, 10:18 PM
Did the 1107 - PK2 - 003's replaice the home made fittings?

Quite a tidy job :D
evolotion
05-02-2009, 10:52 PM
Did the 1107 - PK2 - 003's replaice the home made fittings?

Quite a tidy job :D

id have thought they were the basis for the (now larger ID) home made fittings? .. intresting stuff :)
B20GT
06-02-2009, 12:05 AM
Good eye, can see it in the bottom pic now its been pointed out :D
Remspoor
06-02-2009, 08:47 AM
B20GT wrote:
Did the 1107 - PK2 - 003's replaice the home made fittings?
Quite a tidy job
id have thought they were the basis for the (now larger ID) home made fittings? .. intresting stuff

There are 2 options:
1- Oem honda fitting
2- Larger home-made fittings

There's a discussion about the measurement of the fittings. Some people think that the oem fittings are to small. Some people don't.
There's also a extended piece inside the block of the home-made fittings.
For a recoil of the "oil".

Personally think that the oem fittings will do the job for normal use fine.
Think for circuit use the home-made bigger are better.