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12YDTAH - LS or Morris 1100s

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ryan

Post subject: 12YDTAH - LS or Morris 1100s

Posted: Wed Jun 09, 2010 7:47 pm

1275cc

Joined: Wed Jan 05, 2005 4:50 pm
Posts: 2690
Location: Wollongong

So whats it out of? So many different sources saying different things.

At first I was leaning towards 1275LS but after further reading I'm thinking that it is from a morris 1100S. Are all the references to it being a LS motor mistakes?

Ryan

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Ryan Filippi
Minis In The Gong
[email protected]
www.minisinthegong.com.au

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drmini in aust

Post subject:

Posted: Wed Jun 09, 2010 7:48 pm

religious status

Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39754
Location: near Baulkham Hills, NSW

Yes, it's a Morris 1100S. I have a few...
Yes, those LS references are all wrong. :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:

Last edited by drmini in aust on Thu Jun 10, 2010 8:13 am, edited 1 time in total.

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simon k

Post subject:

Posted: Wed Jun 09, 2010 7:49 pm

Yay For Hay!

Joined: Wed Sep 08, 2004 9:27 pm
Posts: 15912
Location: Wodonga - Vic/NSW border

I'll go out on a limb and say 1100S only - same motor in 1275LS, but a different numbering system

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drmini in aust

Post subject:

Posted: Wed Jun 09, 2010 7:51 pm

religious status

Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39754
Location: near Baulkham Hills, NSW

simon k wrote:

I'll go out on a limb and say 1100S only - same motor in 1275LS, but a different numbering system

Um.. not quite same, all the LS were big journal cranks, the 1100S had tufftrided small journal crank (better) & S rods up until #10,500 approx, then they got the BJ crank & rods.
And, the LS has a 12G1316 head, not a 12G940. Also LS had a breather on the timing cover.

_________________
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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simon k

Post subject:

Posted: Wed Jun 09, 2010 8:02 pm

Yay For Hay!

Joined: Wed Sep 08, 2004 9:27 pm
Posts: 15912
Location: Wodonga - Vic/NSW border

drmini in aust wrote:

simon k wrote:

I'll go out on a limb and say 1100S only - same motor in 1275LS, but a different numbering system

Um.. not quite same, all the LS were big journal cranks, the 1100S had tufftrided small journal crank (better) & S rods up until #10,500 approx, then they got the BJ crank & rods.

yeah, but he was referring to 12YDTAH motors

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Morris 1100

Post subject:

Posted: Wed Jun 09, 2010 8:13 pm

Causing or creating vexation

Joined: Wed Jul 21, 2004 10:32 pm
Posts: 19124

The 12YD motor was assembled in Australia with some local content.
The 1275LS motor (12H902UH) was fully imported and complied to ADR27A.

They look the same but are very different.

The 1275LS never got the 12YD motor.

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drmini in aust

Post subject:

Posted: Wed Jun 09, 2010 8:29 pm

religious status

Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39754
Location: near Baulkham Hills, NSW

simon k wrote:

drmini in aust wrote:

simon k wrote:

I'll go out on a limb and say 1100S only - same motor in 1275LS, but a different numbering system

Um.. not quite same, all the LS were big journal cranks, the 1100S had tufftrided small journal crank (better) & S rods up until #10,500 approx, then they got the BJ crank & rods.

yeah, but he was referring to 12YDTAH motors

So am I, 12YD/Ta/H..
As Morris says this is the Oz built Morris 1100S motor.
I also have an early (UK supplied?) Morris 1100S motor, 12Y/Ta/H...

/Ta (not TA) means remote shift, standard ratios.

_________________
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 Wed Jun 09, 2010 10:25 pm, edited 1 time in total.

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ryan

Post subject:

Posted: Wed Jun 09, 2010 8:32 pm

1275cc

Joined: Wed Jan 05, 2005 4:50 pm
Posts: 2690
Location: Wollongong

Thanks Guys,
Looks like I have an 1100s with small journal and s rods

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Ryan Filippi
Minis In The Gong
[email protected]
www.minisinthegong.com.au

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drmini in aust

Post subject:

Posted: Wed Jun 09, 2010 9:44 pm

religious status

Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39754
Location: near Baulkham Hills, NSW

ryan wrote:

Thanks Guys,
Looks like I have an 1100s with small journal and s rods

A good choice.

The big journal cranks aren't really more durable (as Vizard thought they would be), 1/2 of them are cracked these days, according to my local crank grinder (St George Cranks).

_________________
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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knuts2au

Post subject:

Posted: Wed Jun 09, 2010 10:23 pm

848cc

Joined: Tue Apr 24, 2007 10:45 pm
Posts: 113
Location: on the move, Victoria.

Good timing Ryan, i was about to ask the same question, the Hot Bricks websit lists them as 1275 LS, but i always thought they where 1100S. I picked 2 blocks a head (12G940) and gearbox while on holidays in Tasmania many years ago and have only just unwrapped them to see what i had. Yet to measure anything or pull the cams out to see what they are.

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Cheers
PeterN
3x Leylands
1x 850
Mildura,
Victoria.

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