another breather question and whats this hole !

[pottinger]

hi fellas,

so, doing the whole engine thing whilst its out and want to make sure i do whatever i can to
make sure i am not gona have to pull it again within a few months :lol:

I am going twin carbs so, firstly, breathers, heres some photos.
I beleive mine is an aftermarket filler neck ?
I was going to get a stock once, rum a pipe to my right hand airfilter. Now firstly, the pipe going through the tinware,
ware does it go ? and is it necessary ? if not surely i could just use my present filler neck and pipe it upto air filter.
secondly, wont the particles being drawn up the pipe be entering the carb without passing through the filter itself ? if so, is that ok ?
Lastly, whats the blanking plate on the engine for ? (last piccy)

Lastly, whats this blanking plate for on the engine ?

any help/advice fellas mucho appreciated.

potts who has pottsted loads today !

 

[Tristan71]

That's where the dipstick goes when you use the engine in a fastback

 

[mattd1984]

Which pipe do you mean that goes through the tin?

 

[pottinger]

Which pipe do you mean that goes through the tin?

I havent got one in my pics as its not a stock filler neck,
I mean IF i got a stock one, there is a pipe going downwards from the bottom of the cap through the tinware
and a connection on the top of the cap that you can put a rubber hose on to pipe it upto the airfilter.

there is a piccy in this link of sparkywigs that shows what i mean
http://forum.earlybay.com/viewtopic.php?f=4&t=39228&hilit=oil+breather" onclick="window.open(this.href);return false;

still cant see how dumping everything straight into the carb helps things tho :?
basically whats everyones opinion on what is or isnt needed

potty

 

[mattd1984]

Oh i see what you mean now. This is my setup. Similar to sparky's but using a breather box as I have the same filler neck as you use.

 

[sparkywig]

I binned that aftermarket filler because there's no separation of vapour and condensation.
This was after a 20 mile trip.

The stock filler neck has a separator plate that diverts any condensate into the spout going down through the tinware otherwise it just runs back into the crankcase.
Only vapour is drawn up through the breather and into the carbs and then burnt as part of the combustion process. The only reason I've connected both carbs is roughly the same mixture is being pulled through the inlet manifolds and for symmetry.

 

[pottinger]

Cheers fellas

So next question, where can I get the stock filler neck from .?

Pottsy poos

 

[sparkywig]

Try Mega-Bug.

 

[pottinger]

okay, so why the two options for these ?

I wouldnt have thought dynamo or alternator would make any difference :?

ie
http://vwheritage.com/vw_spares_Oil-fill-funnel-dynamo-no-cap_act_shop.product_pID_37357_lang_EN_country_GB.htm?crumbPageToLoad=2" onclick="window.open(this.href);return false;

http://vwheritage.com/vw_spares_Oil-fill-funnel-alternator-cap_act_shop.product_pID_60775_lang_EN_country_GB.htm?crumbPageToLoad=2" onclick="window.open(this.href);return false;

i,m running a alternator and want to goto a stock filler, breather to air filter, drain out bottm of tinware so little bit confused why the alternator version doesnt have the drain tube ?

anyone ?

ta
potts

 

[Barkafer]

Ports,
Dyno and alternator have different cases so won't interchange.
On the breather front if you are running twins your motor will be pumping out more bhp=more gases moving about=more pressure=more oil leaks !
Breathers connected to the air filters will reduce crankcase pressure (vacuum created) and reduce oil leaks.

Hope this helps.
Badly.

 

[Barkafer]

Potts,
Dyno and alternator have different cases so won't interchange.
On the breather front if you are running twins your motor will be pumping out more bhp=more gases moving about=more pressure=more oil leaks !
Breathers connected to the air filters will reduce crankcase pressure (vacuum created) and reduce oil leaks.

Hope this helps.
Barky.
:lol: bloody mobile phones!

 

[pottinger]

Potts,
Dyno and alternator have different cases so won't interchange.
On the breather front if you are running twins your motor will be pumping out more bhp=more gases moving about=more pressure=more oil leaks !
Breathers connected to the air filters will reduce crankcase pressure (vacuum created) and reduce oil leaks.

Hope this helps.
Barky.
:lol: bloody mobile phones!

:lol: almost baldy

So am i correct in thinking that ALL alternator converted engines have NO drain for the condensation ?
From what i can tell, the breather to air filter is there on BOTH dynamo and alternator fillers but
only the dynamo filler has the tube that allows the condensation to run down and out of the bottom of the tinware ?
See sparkywigs post higher up (thats what happens without the drain me thinks) ?

So what are the options re filler necks / breathers for alternator ?

Trikky, where are you !

potts

 

[moler]

The filler neck with the condensate drain off was a VW upgrade back in the mid 60's, obviously that would have been on dynamo engines, I'll have a look in the OG parts catalogue to see what was fitted to Bay engine as standard?

I'll be fitting one to my next engine build

 

[pottinger]

The filler neck with the condensate drain off was a VW upgrade back in the mid 60's, obviously that would have been on dynamo engines, I'll have a look in the OG parts catalogue to see what was fitted to Bay engine as standard?

I'll be fitting one to my next engine build

we ever get anywhere with this ?
I was going to buy a breather box and pipe from filler to it, then out to fresh air.

Is it a case of alternator conversion stuffs your drain cap and pipe to tinware so youre snookered ?

ive got a hole in the tinware where the drain pipe went so presume this would have to be blanked off
if not being used ? BUT i want to use it, VW did.

potts

 

[Trikky2]

Venting crankcase fumes to atmosphere was banned back in the sixties I think.

It also tends to build an oily film all over the engine over time.

On most engines this just creates a mess but on air cooled this oily mist builds up inside the cooling system as well since its drawn in by the fan. Over time, dust and dirt stick to the oily mess and eventually impede the flow of cooling air, especially the oil cooler, whose narrow air passages will block first.

I know you currently plan to use J tubes and therefore have no heater but for those who do have a heater - the crankcase fumes get drawn into the system and blown round inside the car - not pleasant.

I think this is the breather you mean http://www.vwheritage.com/vw_spares_Oil-fill-funnel-dynamo-no-cap_act_shop.product_pID_37357_lang_EN_country_GB.htm?crumbPageToLoad=2" onclick="window.open(this.href);return false; (need to check if it will clear an alternator though otherwise you will have to use the one without the drain tube)

If you decide to get one of these you will also need to order the plastic "beak" non return bit that goes on the bottom of the outlet pipe. Its important to have this fitted since its this that allows the condensate water to exit whilst maintaining the mild suction through the crankcase itself.

You would also need a filler cap btw and there is normally a plastic sealer ring round the down pipe where it goes through the tinware.

Maybe we should edit all these posts together and publish a "how to" manual :lol:

 

[pottinger]

Maybe we should edit all these posts together and publish a "how to" manual :lol:

:lol: i know, but at least some poor stupid person like me later wont ask em :lol:

SO, what would you do then ? - breather box and plug the tinware hole ?

I presume the reason people take a breather to the airfilter(s) is to create this suction you mentioned ?
SO, would i be correct in thinking a breather box only is ineffective as it doesnt have any draw ?
It would need to go filler neck union to breather box / breather box to airfilters to have any effect ? This is
i suppose replicating the oil bath original way of doing it ?
I would then think the drain that i have banged on about :lol: is wise as it allows the escape of heavier deposits
etc

cheers again Trikky.

 

[moler]

I can't find any reference to an alternator specific one, only dyno specific ones!!

I've just been out to compare dyno and alternator stands, and the mountings for the oil filler are at a slightly different angle and length. It should be an easy mod to get one to fit, I'll let you know in a couple of weeks when I blitz my engine build

 

[pottinger]

I can't find any reference to an alternator specific one, only dyno specific ones!!

I've just been out to compare dyno and alternator stands, and the mountings for the oil filler are at a slightly different angle and length. It should be an easy mod to get one to fit, I'll let you know in a couple of weeks when I blitz my engine build

that would be spot on moler

 

[Trikky2]

The aftermarket breathers I have seen all lack a baffle trap and the restricted diameter of the outlet would indicate they are more likely to be restrictive and suffer from "mayonnaise".

Hence I run an original breather with the pipe going to the top of the right hand air filter. Its what most people do and it works fine.

 

[pottinger]

The aftermarket breathers I have seen all lack a baffle trap and the restricted diameter of the outlet would indicate they are more likely to be restrictive and suffer from "mayonnaise".

Hence I run an original breather with the pipe going to the top of the right hand air filter. Its what most people do and it works fine.

did ya block up ya tinware hole ?
last question, promise :msn4: :lol: