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1275 motor

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Gezo

Post subject: 1275 motor

Posted: Tue Dec 28, 2004 8:36 pm

848cc

Joined: Mon Apr 19, 2004 4:58 pm
Posts: 340

Hi,
I have a 12YD/Ta/H block 40+ and 12G1683 crank, is this a good 1275 motor to rebuild or is it better to just buy a cheap imported motor.
Thanks

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poeee

Post subject:

Posted: Tue Dec 28, 2004 8:43 pm

1360cc

Joined: Tue Mar 16, 2004 8:55 am
Posts: 11264
Location: Geelong, Victoria

You will find that the import motors still will need work, possibly a full rebuild. If they don't, no doubt they will be expensive.

Go rebuild the one you have, I recon.

_________________

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drmini in aust

Post subject:

Posted: Tue Dec 28, 2004 8:45 pm

religious status

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

Yes it is as good or better than a later Metro one. Those blocks are strong and good for big bores, the crank is a big journal, tufftrided.
Some 1275 A+ rods and it'll be perfect! :wink:

_________________
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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Gezo

Post subject:

Posted: Tue Dec 28, 2004 9:20 pm

848cc

Joined: Mon Apr 19, 2004 4:58 pm
Posts: 340

Hi,
Thanks DrMini,
The block is stamped 12YD/Ta/H, note little "a". I have seen a few Mark 1 Cooper S's at shows with 9F/SA/Y engine number, note big "A", even though the plate says 9F/Sa/Y.
In the Mini Experience, it said that most cars tended to have small "a" on the ID plate and Big "A" on the block. Did some cars come with a Little "a" stamping and others with a Big "A". Or was there just different sets of stamps. Have you seen both.
Thanks

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drmini in aust

Post subject:

Posted: Tue Dec 28, 2004 9:26 pm

religious status

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

Ta is used on blocks. Always stamped lower case. SA means close ratio (Cooper) gears, Ta means transverse I think. Common on remote boxes & 1100 & 1100S.
If the Ta is stamped TA, somebody has restamped it... :shock:

_________________
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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Morris 1100

Post subject:

Posted: Tue Dec 28, 2004 9:32 pm

Causing or creating vexation

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

From the 1100 workshop manual.

12 = Capacity of engine
Y = Australian manufacture
D = Variation to power unit 'D' = 4:1 Final drive
Ta = Std. ratio remote centre change
H = High compression

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Gezo

Post subject:

Posted: Tue Dec 28, 2004 9:42 pm

848cc

Joined: Mon Apr 19, 2004 4:58 pm
Posts: 340

Hi ,
Thanks Again,
Definitely has Ta little "a".
Did the Coopers have a Big "A".(SA)
Thanks

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drmini in aust

Post subject:

Posted: Tue Dec 28, 2004 9:51 pm

religious status

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

Been a while since I had a MK1 S motor, not sure. My Mk2 S motor is 9F/XE/Y .
<edit> Think Mk1 S was /SA, not sure about 997 & 998 Cooper.

_________________
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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