Im building a 2054 engine, which should put out somewhere in the region of 150BHP.

I have had the case modified for extra windage, to relieve crankcase pressure by JMR. I have csp rocker covers with the facility for breather pipes and also a mst alt stand with oil breather outlet.

Now do i need to connect all this up to an external oil breather to avoid oil blowing out everywhere at high revs if so what one...

I've heard the bug pack ones are rubbish and restrictive so whats a good alternative or do i not need to bother?


cheers

if you fit deflector plates inside the rocker boxes to cover the breather hole the oil should not go up through them but guess doing that depends on your rocker arm to cover clearance if you have space. no idea on the range of breathers available but hoses going up means anything in them will run back down when the engine stops
fitting the small paper type ones straight on to the boxes will result in them clogging up.

Ideally you need to run the rocker breather pipes to some form of 'puke' tank.

If you intend to drag race, then there is a requirement for this to be able to hold at least litre of liquid.

I use and used to sell these: Jaz 1 Quart Breather this acts as both a breather and catch tank in one and can be modified for multiple connections, despite only being fitted with a single connection.

Quote from: snoopy on April 29, 2015, 03:12:55 PM
if you fit deflector plates inside the rocker boxes to cover the breather hole the oil should not go up through them but guess doing that depends on your rocker arm to cover clearance if you have space. no idea on the range of breathers available but hoses going up means anything in them will run back down when the engine stops
fitting the small paper type ones straight on to the boxes will result in them clogging up.

I can block the outlets off in the rockers and alt stand as i have plugs that will fit. it was more of a case if i do this will i get oil blowing out of everywhere due to pressure.

Quote from: Zebethyal on April 29, 2015, 03:18:22 PM
Ideally you need to run the rocker breather pipes to some form of 'puke' tank.

If you intend to drag race, then there is a requirement for this to be able to hold at least litre of liquid.

I use and used to sell these: Jaz 1 Quart Breather this acts as both a breather and catch tank in one and can be modified for multiple connections, despite only being fitted with a single connection.

cool thanks, so something like this..
do i need to also connect the oil outlet on the alternator stand too?
http://www.demon-tweeks.co.uk/motorsport/oil-catch-tanks/mocal-alloy-oil-catch-tank

dav

That will work fine as a catch tank

I would suggest all breather lines ultimately dumping to the catch tank, ideally you need a breather somewhere to vent the system or it will still all be pressurised, you can have all your breather lines go to a vented breather box which in turn drains to the catch tank.

The last thing you want is for your breather to spray oil all over your engine/the track - been there done that, became very unpopular very fast as they had to shut down the lane to clean it after my run 

Quote from: Zebethyal on April 29, 2015, 04:56:09 PM
That will work fine as a catch tank

I would suggest all breather lines ultimately dumping to the catch tank, ideally you need a breather somewhere to vent the system or it will still all be pressurised, you can have all your breather lines go to a vented breather box which in turn drains to the catch tank.

The last thing you want is for your breather to spray oil all over your engine/the track - been there done that, became very unpopular very fast as they had to shut down the lane to clean it after my run 

That one says the it has a special cap that allows the tank to breathe without oil bypassing, so i shouldn't need a separate breather?

Then that should be fine - I just looked at the pretty picture and skipped the 'blurb' 

Hi

I have some history with oil being pumped out of the dip stick tube on the 2054cc engine I fitted to our splitty. Not the same with the 2054cc in the buggy thankfully.

Anyway I managed to cure this by fitting a CB breather tower, fuel pump block off CB which is drilled and tapped and hoses linking it all up including into the carb air filter tops. I don't have any breathers from the rocker covers in the bus and the engine oil system is no longer a total loss system.

I do have some pics of this but the pc at work blocks photobucket so will post a pic later.

As all engines are different this might work or might not. The bus has been on the rolling road and is putting out 120 bhp.

Testa

Hi Davyd the baffle plate is fitted over the end off the outlet but not sealed so the air passes around it then up not just straight up and out so more of a deflector plate.

Davyd

I am in the process of addressing this myself (albeit only on a 1776).   I took a breather to a carb from the alternator stand (what I had on my 1300) and it wasnt running well.   When I took the filter off the carb I notice oil droplets on the stacks.   I spoke to Steff at MAC and he suggested the CB Performance tower and possibly back to the carb.

I did quite a bit of reading on this and it a total mix of views.   I found some good stuff on the Samba though again mixed.   Several of the US guys seem to add a stainless steel pan scrub (yes pan scrub) in the top of the breather tower as then you have the baffles and this as well.  Not tried it myself but I can see the basic idea.

Also there is a split of views about taking this back to the carb.  ManxDavid told me about this ages ago and it always worked well for me on the previous motor.   Others seem to suggest different ie avoid the carb, add some form of filter (ideally not the stupid little ones) and position it in free air flow.

I will let you know how I go on and take some pics .... though I need some decent weather plus I cant really do much at the mo as the brakes are shot...... hence the big parcel of goodies that arrived today and hopefully the disc conversion on the front on Sat

Mate,

I've fitted a stainless steal breather box CSP design with 6 ports. 2 for rocker covers, 1 for mst alternator stand, 1 for fuel pump block off plate, 1 blanked off and the last one with a wee air filter on. The box is fitted behind the engine above cylinder head hight. Hope that make sense. 

My engine has 3 vents on it, all approximately 1/2 inch. They have no pipes on them, so little restriction! there is very little sign of oil around the vents. However, when I boot it to 6,000 rev's, it blows the oil dip stick out, luckily the engine cage stops it from coming out all the way 

So if you are going for breathers on your engine, you will need a system to handle more air flow than you thought, especially with all the power and rev's your engine will produce 

Rob

This looks good   

http://www.ebay.co.uk/itm/ADD-W1-Blue-Baffled-Universal-Aluminum-Oil-Catch-Tank-Can-Reservoir-Tank-Ver-2-/201095216920?hash=item2ed2357f18

A CB tower with 1 (top) outlet to atmosphere through a flap valve to stop sucking when on overrun works for me.

If an engine is breathing really heavy I'd look to solve the cause not the effect.

Quote from: Zebethyal on April 29, 2015, 07:33:45 PM
Then that should be fine - I just looked at the pretty picture and skipped the 'blurb' 

great thanks

Quote from: Testa on April 30, 2015, 12:53:33 PM
Hi

Anyway I managed to cure this by fitting a CB breather tower, fuel pump block off CB which is drilled and tapped and hoses linking it all up including into the carb air filter tops. I don't have any breathers from the rocker covers in the bus and the engine oil system is no longer a total loss system.

I do have some pics of this but the pc at work blocks photobucket so will post a pic later.

As all engines are different this might work or might not. The bus has been on the rolling road and is putting out 120 bhp.

Testa

Picts would be good 

Quote from: Krug on April 30, 2015, 05:15:38 PM
Davyd

I am in the process of addressing this myself (albeit only on a 1776).   I took a breather to a carb from the alternator stand (what I had on my 1300) and it wasnt running well.   When I took the filter off the carb I notice oil droplets on the stacks.   I spoke to Steff at MAC and he suggested the CB Performance tower and possibly back to the carb.

I did quite a bit of reading on this and it a total mix of views.   I found some good stuff on the Samba though again mixed.   Several of the US guys seem to add a stainless steel pan scrub (yes pan scrub) in the top of the breather tower as then you have the baffles and this as well.  Not tried it myself but I can see the basic idea.

Also there is a split of views about taking this back to the carb.  ManxDavid told me about this ages ago and it always worked well for me on the previous motor.   Others seem to suggest different ie avoid the carb, add some form of filter (ideally not the stupid little ones) and position it in free air flow.

I will let you know how I go on and take some pics .... though I need some decent weather plus I cant really do much at the mo as the brakes are shot...... hence the big parcel of goodies that arrived today and hopefully the disc conversion on the front on Sat

Yes its a mine field, some say take it to carb some say don't. Others say its a waste of money and there too restrictive.....ahhh!
gonna talk to Stef tomorrow when i pop in

Quote from: crowey on April 30, 2015, 09:20:42 PM
Mate,

I've fitted a stainless steal breather box CSP design with 6 ports. 2 for rocker covers, 1 for mst alternator stand, 1 for fuel pump block off plate, 1 blanked off and the last one with a wee air filter on. The box is fitted behind the engine above cylinder head hight. Hope that make sense. 

Yes seem them, they look good, bit big...is yours mounted to the fan housing at the rear or on the body?

Quote from: farmer rob on April 30, 2015, 09:22:06 PM
My engine has 3 vents on it, all approximately 1/2 inch. They have no pipes on them, so little restriction! there is very little sign of oil around the vents. However, when I boot it to 6,000 rev's, it blows the oil dip stick out, luckily the engine cage stops it from coming out all the way 

So if you are going for breathers on your engine, you will need a system to handle more air flow than you thought, especially with all the power and rev's your engine will produce 

Rob

See this is it, i don't want to end up with oil everywhere and don't want to do stuff thats pointless...

Quote from: Chad on April 30, 2015, 09:45:56 PM
This looks good   

http://www.ebay.co.uk/itm/ADD-W1-Blue-Baffled-Universal-Aluminum-Oil-Catch-Tank-Can-Reservoir-Tank-Ver-2-/201095216920?hash=item2ed2357f18

hmmmmm, nice and will go with the colour of my buggy....

Quote from: Flags on April 30, 2015, 10:15:05 PM
A CB tower with 1 (top) outlet to atmosphere through a flap valve to stop sucking when on overrun works for me.

If an engine is breathing really heavy I'd look to solve the cause not the effect.

Problem is i don;t know if i have a problem yet, and id like to avoid one. I could be trying to solve a problem that doesn't exist but i just don't know
my thinking is a catch tank and vent can't do any harm.

cheers chaps keep 'em coming