Sleepers 1275 Sleeper

Common upgrades - A-Series mods, brakes,wheels, handling, interior.
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Panky
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Re: Sleepers 1275 Sleeper

Post by Panky »

The MG Metro one is a bigger bore.

Image


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Ted the 1971 Bermuda Blue Traveller
'91 Mini Cooper
1971 Commer Auto-Sleeper
!969 Commer Jennings Roadranger

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Sleeper
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Re: Sleepers 1275 Sleeper

Post by Sleeper »

Thank you , do you know the bore size?

This could do?
Maybe canted upwards a little too much?

https://www.ebay.co.uk/itm/Classic-Mini ... 4585332551

John ;-)



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Custard
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Re: Sleepers 1275 Sleeper

Post by Custard »

The angles vary too.

These are very expensive for what they are, but the angle is changed.

https://www.morrisminorcentrebham.co.uk ... 5cc/12m220

I think the radiator was different in a Midget so the normal Morris one on a 1275 head points in slightly the wrong direction.

There is a fair bit of meat on them and opening out a little would make a big difference in cross sectional area.

I wasn't too impressed with the way it blended in from the pipe into the housing and did a bit of porting on mine.

I think the biggest cooling issue with the Minor is getting the flow to the back of the head which is why BMC Ecosse always said leave the heater on.

Sean.



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Panky
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Re: Sleepers 1275 Sleeper

Post by Panky »

The MG Metro one has the outlet flat with a bore of 27mm.


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Ted the 1971 Bermuda Blue Traveller
'91 Mini Cooper
1971 Commer Auto-Sleeper
!969 Commer Jennings Roadranger

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Re: Sleepers 1275 Sleeper

Post by Sleeper »

Yes, the minimine one seems to be an optical illusion ...

" Hello. The O/D is 27mm.
Kind Regards
Websales Team
minimine-ltd "

John ;-)



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Re: Sleepers 1275 Sleeper

Post by Sleeper »

Dear All.
Looking at the block ( A+ ) , do I have a problem? It seems that this is an oil-gallery but going nowhere? , looks like the sump pan is not blocking it?
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Bewildered..

John ;-)



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philthehill
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Re: Sleepers 1275 Sleeper

Post by philthehill »

The hole is the dump passage from the oil pressure relief valve back to the sump. It must be left open.



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Re: Sleepers 1275 Sleeper

Post by Sleeper »

Phil

Thank you..

John ;-)



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Re: Sleepers 1275 Sleeper

Post by Sleeper »

Dear All
It's re-assembly time... primimg the oil , am I right in assuming the two brasssed holes( nails ) are the feed to the rockers?
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Original image recording time:
2021:04:09 10:47:29
Image taken on:
Fri Apr 09, 2021 9:47 am
Focus length:
5 mm
Shutter speed:
1/30 Sec
F-number:
f/3.3
ISO speed rating:
320
Whitebalance:
Auto
Flash:
Flash fired, auto mode, return light detected
Camera-manufacturer:
SONY
Camera-model:
DSC-W170
Exposure program:
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Exposure bias:
0 EV
Metering mode:
Pattern
and if so , can I also assume that I can prime the oilways and pump ( etc ) by filling via the funnel on the right...
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Original image recording time:
2021:04:09 10:45:24
Image taken on:
Fri Apr 09, 2021 9:45 am
Focus length:
5 mm
Shutter speed:
1/30 Sec
F-number:
f/3.3
ISO speed rating:
320
Whitebalance:
Auto
Flash:
Flash fired, auto mode, return light detected
Camera-manufacturer:
SONY
Camera-model:
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Exposure program:
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which is linked to the hole ( screwdriver ) on the left ... which will start to overflow when the oilways are full ?

..and these oilways are linked to the central fitting on the oil filter ( not yet fitted, just taped off ) ?

Many Thanks

John ;-)



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Re: Sleepers 1275 Sleeper

Post by Sleeper »

OOOOoooops
Looks like I assumed incorrectly...
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Original image recording time:
2021:04:09 11:22:18
Image taken on:
Fri Apr 09, 2021 10:22 am
Focus length:
5 mm
Shutter speed:
1/30 Sec
F-number:
f/3.3
ISO speed rating:
160
Whitebalance:
Auto
Flash:
Flash fired, auto mode, return light detected
Camera-manufacturer:
SONY
Camera-model:
DSC-W170
Exposure program:
Normal program
Exposure bias:
0 EV
Metering mode:
Pattern
ah well, a little oil in the "rusty" water jacket will do no harm...maybe even lubricate the water pump..


So where did I go wrong??

John :-(



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Re: Sleepers 1275 Sleeper

Post by Sleeper »

By a process of elimination , and blowing through a short piece of tube , I think I've found it.... a tiny hole just below No1 exhaust port ( front right in the piccy above ).

But why are two of the water jacket holes brass bushed?

John ;-) Never assume anything...

P.S. Google images is no real help when one types in A series oilways...



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Mecanglais
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Re: Sleepers 1275 Sleeper

Post by Mecanglais »

This should be the oil feed to the top of the head.
IMG_20210410_071853.jpg
IMG_20210410_071853.jpg (532.52 KiB) Viewed 19 times
IMG_20210410_071853.jpg
EXIF-Data show/hide
Original image recording time:
2021:04:09 10:47:29
Image taken on:
Fri Apr 09, 2021 9:47 am
Focus length:
5 mm
Shutter speed:
1/30 Sec
F-number:
f/3.3
ISO speed rating:
320
Whitebalance:
Auto
Flash:
Flash fired, auto mode, return light detected
Camera-manufacturer:
SONY
Camera-model:
DSC-W170
Exposure program:
Normal program
Exposure bias:
0 EV
Metering mode:
Pattern
I believe it is driven by a drilling/oilway in the front cam bearing so while it is a good idea to tip some oil down there you might still want to prime via the oil pressure release valve and/or the blanking plug.



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kingsley
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Re: Sleepers 1275 Sleeper

Post by kingsley »

Sleeper wrote:
1 month ago
Dear All

Flywheel modified to sit on the marina? crank...
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just needed opening up from 77mm to 79mm
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just needs skimming / balancing...

Manifold ready to accept wideband sensor...
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and fitted..
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John ;-)
Excellent work. I like the idea of using sensors and this comment is not a negative :D I am very interested. Does the sensor restrict the flow of the exhaust gases? Modern cars are riddled with sensors, which suggests no. Do all sensors project into the flow or can they be flush? It seems very counter intuitive that it is common practice to spend a lot of time and money on reducing restrictions in the intake and exhaust systems and then introduce significant restrictions in the form of sensors? Can anyone educate me please?



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Re: Sleepers 1275 Sleeper

Post by Sleeper »

" I believe it is driven by a drilling/oilway in the front cam bearing so while it is a good idea to tip some oil down there you might still want to prime via the oil pressure release valve and/or the blanking plug. "

Thank you, will do nearer the time..

As for the wideband sensor, I don't think it will work unless it is in the gas-flow , some you win , some you lose.

John ;-)



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Re: Sleepers 1275 Sleeper

Post by Custard »

Getting the gases in and out of the cylinder head is the important bit.

Once through the manifold and in the exhaust it becomes less of an issue and the bigger bore the exhaust the less the percentage area interrupted by the sensor.

A lot of diesels now have two as they check before and after the Diesel Particulate Filter so they can tell when its not doing anything useful.

I don't think you would want to put a sensor in the standard Morris pea shooter exhaust though, that would be a fair obstruction.

Though you also have to consider that there are normally baffles further down the line that do more impeding of gas flow than a sensor will.

Sean.



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