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ricksmini
 Post subject: breathers
PostPosted: Thu Feb 23, 2012 7:15 pm 
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Location: Goulburn
how many breathers should i run on an 1100s engine?
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simon k
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PostPosted: Thu Feb 23, 2012 7:17 pm 
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factory was 1, I use two
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Morris 1100
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PostPosted: Thu Feb 23, 2012 7:20 pm 
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I use 1.
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drmini in aust
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PostPosted: Thu Feb 23, 2012 7:27 pm 
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I use 1, from the rocker cover to a Toyota PCV valve into the manifold, on both my 1360 and 1412 stroker.
I had it on the flywheel housing instead, but the drop gears tossed oil up it on long LH bends if I had `a few' revs up.

A well known Nc Mini racer we all know uses none.

IMO you only need more than 1 decent breather if you have poor ring sealing. :wink:

Image

On my 1360 (now back in the car) I have since added a hose from the rocker cover to the drop gear housing- to help equalize pressure upstairs/downstairs.

Image

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:


Last edited by drmini in aust on Fri Feb 24, 2012 1:52 pm, edited 1 time in total.

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ricksmini
 Post subject:
PostPosted: Thu Feb 23, 2012 7:33 pm 
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Location: Goulburn
im using an electric fuel pump so i was wondering if i could put a blanking plate where the mechanical fuel pump goes with a fitting in it to go to a catch can and plum a the rocker cover breather in to it
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ricksmini
 Post subject:
PostPosted: Thu Feb 23, 2012 7:34 pm 
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simon k where abouts do you have the pair of breathers
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drmini in aust
 Post subject:
PostPosted: Thu Feb 23, 2012 7:38 pm 
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ricksmini wrote:
im using an electric fuel pump so i was wondering if i could put a blanking plate where the mechanical fuel pump goes with a fitting in it to go to a catch can and plum a the rocker cover breather in to it

Been there done that. :evil:
At 4500 rpm and above the crank and rods will tos HEAPS of oil up it.
Don't bother. (MiniMania in USA sells a baffled one, it might work but it ain't cheap).

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:
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smac
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PostPosted: Fri Feb 24, 2012 5:33 am 
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http://www.ausmini.com/forums/viewtopic.php?t=71363&postdays=0&postorder=asc&start=15
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simon k
 Post subject:
PostPosted: Fri Feb 24, 2012 9:36 am 
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ricksmini wrote:
simon k where abouts do you have the pair of breathers


one on the flywheel housing and one on the rocker cover...

can see them here - two into one, then into a little inline PCV and into the inlet manifold

Image
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DA9jeff
 Post subject:
PostPosted: Fri Feb 24, 2012 1:27 pm 
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848cc
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Location: Gawler SA
3..... clutch cover/tappet cover/back "door"of block into a 2lt catch can[with drain tap on the bottom.]Starting at the rear offtake...tappet offtake...clutch housing...to catch can on RHS inner guard panel. 1 hose with 3 "T" pieces.

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1974 1150cc Leyland Mini S racer,
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drmini in aust
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PostPosted: Fri Feb 24, 2012 1:54 pm 
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Sorry, :oops: double post...

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:


Last edited by drmini in aust on Fri Feb 24, 2012 5:32 pm, edited 1 time in total.

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gruhms
 Post subject:
PostPosted: Fri Feb 24, 2012 4:15 pm 
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drmini in aust wrote:
drmini in aust wrote:
I use 1, from the rocker cover to a Toyota PCV valve into the manifold, on both my 1360 and 1412 stroker.
I had it on the flywheel housing instead, but the drop gears tossed oil up it on long LH bends if I had `a few' revs up.

[A well known Nc Mini racer we all know uses none].

IMO you only need more than 1 decent breather if you have poor ring sealing. :wink:
I don't like catch tanks on road cars, they make the cabin smelly. But yeah if it was a racer I'd use one.

Image

On my 1360 (now back in the car) I have since added a hose from the rocker cover to the drop gear housing- to help equalize pressure upstairs/downstairs.

Image


Nice work on quoting your own post. That's awesome.

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Don't be fooled, Gruhms is not my real name.
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drmini in aust
 Post subject:
PostPosted: Fri Feb 24, 2012 5:30 pm 
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Sorry double post and I didn't catch it. Had to go in a hurry... :?
Thanks for posting it all again though, pics and all... :lol:

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:
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The Duckmeister
 Post subject:
PostPosted: Fri Feb 24, 2012 6:06 pm 
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I have a single breather, basically the same setup as the good Doctor's. Seems to work well enough. :)

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You're only supposed to blow the BLUDDY DOORS OFF!!
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gruhms
 Post subject:
PostPosted: Sat Feb 25, 2012 9:10 am 
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drmini in aust wrote:
Sorry double post and I didn't catch it. Had to go in a hurry... :?
Thanks for posting it all again though, pics and all... :lol:


Happy to be of service.

I'll stop wasting this thread now.

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Cheers, Matt

Don't be fooled, Gruhms is not my real name.
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