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PostPosted: Mon Sep 09, 2019 10:35 am 
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Joined: Thu Jun 24, 2010 11:19 pm
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Can someone educate me here as to what's so special / differences on a formula junior engine block for a 1071S against a regular 1071 block . I know the obvious as in the front detail below the oil pressure relief valve . I'm restoring a 1071 at the moment and it has the formula junior block . .... ken

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1963 austin Cooper s mk1 1071
1966 Austin Cooper s mk1 1275
1968 Austin Cooper mk2 998
1962 Morris mini super 850
Porsche 997 turbo S
Ford transit van 280s


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PostPosted: Mon Sep 09, 2019 1:39 pm 
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Joined: Tue Feb 09, 2016 11:30 pm
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Location: South Northants
Fuel pump hole? not that it’s special but a small difference.
D


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PostPosted: Mon Sep 09, 2019 7:25 pm 
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Joined: Thu Jul 12, 2012 5:18 pm
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I think it’s just a transitional block from FJ racing from the 50’s before BMC started casting the AEG 151 blocks for the Mini Cooper s 970 and 1071. Not sure why they would do that, but it obviously happend.
Maybe a little bit more care was taken as the caps are all numbered and stamped on the block, also the main bearing studs/bolts are a little different I think.
Guessing now as I’ve sold the couple I had.


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PostPosted: Tue Sep 10, 2019 12:28 pm 
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No difference performance wise. The differences are absolutely superficial, I don't think that these were ever thought of as a "transition" block in period, more they were the type of block used initially until the production block was standardised.

Main differences are as has already been said a fuel pump / dry sump hole in the back, a couple of (redundant) extra lugs for engine mountings in longitudinal applications and the aforementioned flat section under the oil pressure relief valve.

I prefer to call these Flat front blocks as ALL Formula Juniors used longitudinal engines NOT transverse ones, so these blocks could NEVER be used in an FJ car.

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PostPosted: Tue Sep 10, 2019 12:54 pm 
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Thanks for the info . I suppose it may help when and if I sell it . This will be the first 1071 I've owned so I'm really looking forward to it ...Not sure what to expect bu my mate Scott has had a couple and says they've got the sweetest engine with a few mods carried out

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1963 austin Cooper s mk1 1071
1966 Austin Cooper s mk1 1275
1968 Austin Cooper mk2 998
1962 Morris mini super 850
Porsche 997 turbo S
Ford transit van 280s


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PostPosted: Wed Sep 11, 2019 8:29 am 
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Joined: Thu Jun 24, 2010 11:30 am
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1070 is by far the nicest Cooper S.

Head and shoulders above the others.

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I Must be f*&%^g mad


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