22 replies to this topic

[sean1380]

iv got the oppertunity to buy a 1071 s engine minus the clutch/flywheel and diff,dizzy etc its in a fair state but could prob do with a rebuild

..but im unsure of what to offer the guy as we both know its rareity but i dont wana give him too much n he obviously doesnt wana give it away
so does/has anyone seen any for sale or know roughly what its worth??

[nicksuth]

It really depends on the condition of the crank, i.e. how many grinds has it had - -10, -20, -30 and the block, i.e. how many re-bores has it had - +20, +40, +60 although you can always have it linered!!! Also, is it a pukka 3 sync, CR gearbox?

Edited by nicksuth, 11 July 2009 - 10:04 PM.

[sean1380]

It really depends on the condition of the crank, i.e. how many grinds has it had - -10, -20, -30
how can i find this out?strip it down n have a look but how will i tell??

and the block, i.e. how many re-bores has it had - +20, +40, +60 although you can always have it linered!!!
yeah i suppose thats an option,but how will i know this too??


Also, is it a pukka 3 sync, CR gearbox? i dunno what box its got on it,he said it pulled like a train and is faster than his mates 1380

im stuck now as i dont wana loose out on it but abit stuck

[nicksuth]

Doesn't the guy selling it know anything about it? If not you're going to have to either take a chance or agree a price based on what you find when you strip it and measure (micrometer) the crank journals and cyclinder bores?

[sean1380]

Doesn't the guy selling it know anything about it?........no he knows nothing about it really not had engine long as it came with a car he bought

If not you're going to have to either take a chance or agree a price based on what you find when you strip it and measure (micrometer) the crank journals and cyclinder bores?

what sizes should i be looking for on the crank and widths of cylinder bores??

dont mean to be stupid like but just wana get it right

cheers for your help tho

[jaydee]

Are u ure that engine is really a 1070 S?
If so, i wouldnt think twice, whatever are conditions.
About the bore and the stroke, now i dont remeber it right (it isnt a common engine) i have to give a look on some books.

[jaydee]

1070 was born as an overbore of the 850 engine, so bore size is 70.6mm then stroke 68.26 mm.
With the same bore size there are the short engine 970 s (61.91 mm stroke) and the long stroke 1275 s (81.28 mm stroke).
About eninge numbres, they are quite caotic and dont follow a definite scheme as later minis do. Most of them have the same 9FSAH prefix as the 997 cooper eninges.

[sean1380]

nice 1 cheers fella

well weve followed mr vizards chart at the start of modify your mini n broke it down to either a 970 s or a 1071,looks like its big enough block to be a 1275,tappet covers on rear,11stud head,no extra metal above flange on block but no engine numbers or stamps so gonna av to pull it apart

iv written them down so ill get the measurements from the engine n compare them

yeah i know its pretty rare just hope he lets me have it as iv heard good things about them

my ex's dad had one in his clubman years ago n he said it revved up too 14k??is this believable???

Edited by sean1380, 12 July 2009 - 01:01 AM.

[jaydee]

As far as i know, works car equipped with the 1071 had from 70 bhp at 6k to 85 bhp at about 7.8k revs.
Its the 970, which is a short engine, that is capable of very high revs.

[nicksuth]

1070 Cooper S

- Crank should be - AEG171 (EN40B not cross drilled)
- Head should be -AEG165 or 12A185 or AFG163 or the better known 12G940

Engine No.s

Prefix cc Body No. Model
------ --- -------- -------------------

9F/Sa/H 1071 C/A2S7 Austin Cooper 'S' (UK)
9F/Sa/H 1071 K/A2S4 Morris Cooper 'S' (UK)
l0F 1071 ? Morris Cooper 'S' (UK)

Gearbox No.s

Cast number on front of the gearbox: 22G 190 (970 and 1071 A and B)


Ratios
1 2 3 4 F/D Car Year

3.200 1.916 1.353 1.00 3.444 Cooper S 1071 1963

If it's a Gold Seal factory Rebuild -

8G133 Gold seal pre-closed circuit breathing 1070cc 'S'
8G153 Closed circuit breathing sideplates introduced 1070cc 'S'

Edited by nicksuth, 12 July 2009 - 09:55 AM.

[sean1380]

As far as i know, works car equipped with the 1071 had from 70 bhp at 6k to 85 bhp at about 7.8k revs.
Its the 970, which is a short engine, that is capable of very high revs.

cherers well ill bear that in mind,i dont think ill be doing anything crazy too it if i got it,just get it runing sweet n itd be a nice period engine for my car

thing is iv only just finished building a 1380 from scratch n now this has come along im just gonna have too pull it all out n start again haha #


cheers nick suth for your help n info,iv got everything printed out so can give me/us more of an idea what were looking at

cheers folks

Edited by sean1380, 12 July 2009 - 10:43 AM.

[Rosslin Racing]

the blocks worth a few bob and so is the crank if its not on its last legs, put it on ebay and you will see 500 quid is not unrealistic if its in good nick.


dibs on the block

Edited by Rosslin Racing, 12 July 2009 - 08:44 PM.

[nicksuth]

Someone on here bought one "un-stripped" and it turned out to be a bargain - crank -10, block linered but okay and CR G'box (£500), you but your tricket and take your chance??

Offer him £500 cash (wave it in front of his nose) and you may get it.

I have heard of unground cranks fetching £1000 alone!!!

[pdaykin]

Just a quick note, the head casting is AEG163 not AFG163 - IIRC the AFG reference comes from a typo in Vizards book.

The block casting number is not the same as the 1275 Cooper S (AEG312). I think 1070's were all AEG161
- it is found at the rear of the block, RHS

Edited by pdaykin, 13 July 2009 - 05:24 PM.

[62S]

970/1070 block should have AEG 151 cast in the back.