morris 1100

The Home of the Bigger Brothers, BMC 1100s, 1300s, A40s, A35 etc.
goff
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Re: morris 1100

Post by goff »

spoon.450 wrote: Mon Dec 14, 2020 9:38 pm
rpb203 wrote: Mon Dec 14, 2020 9:10 pm Got any more pictures of the mini Clubman you could post please?
Beat me to it :D
Don't worry about that Clubman Dave ;) , look at the remote !!! Its a Mini not ADO16 , so could this be Cooper S engine :o .
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spoon.450
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Re: morris 1100

Post by spoon.450 »

Bloody ell Goff....you don’t miss much ! Well spotted again. What’s Alan’s thoughts ?
goff
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Re: morris 1100

Post by goff »

spoon.450 wrote: Tue Dec 15, 2020 10:52 am Bloody ell Goff....you don’t miss much ! Well spotted again. What’s Alan’s thoughts ?
I tell what Dave !!! it's a great find especialy for South America , well done Solomorris ;) ;) ;) but it still has the 1100/1300 front engine plate with the engine mount forward below the alternator ? , i reckon the engine was rebuilt and that part added to fit in the ADO 16 .
Supersonic
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Re: morris 1100

Post by Supersonic »

Dave & Goff,

I have to say I was sceptical from when I first spotted that engine, let me explain. I’ve never ever seen a thick flange 1275cc Cooper S block in an ADO16 car. And further, never seen the 1275cc Cooper S block in a base model car. Furthermore, the very early Mk1 upmarket cars fitted with the 1275cc thin flange engines never had the 11-stud cylinder head albeit the blocks were drilled for 11-studs.And all the 1275cc Mk1 cars were all built in 1966.

But other members of The 1100 Club have seen later Mk2 cars with the Cooper S block.

Writing in the great book The Story of The 1100, the very knowledgeable Steve Lee writes as follows: - “1275cc Engines, in early Mk2 cars from June 1967 a 1275cc engine was offered as an option to the 1098cc engine. The engine, suffixed by engine number 12G, is an extremely rare unit. These engines have double valve springs on the cylinder head and have a smaller 1.625 inch connecting rod crankshaft diameter also used in the Mini Cooper S. Tappet chest covers were still present on this engine and it is possible that the crankshaft was made from EN40B steel as used in the Cooper S engine”.

David Vizard writes, “The rods in these engines were down-graded, although this has never proved to be a problem, thus indicating that the Cooper “S” rods were overly strong in the first instance”

This is what I wrote sometime ago, “The early 1275 cc engine appeared in three forms from 1967 to complicate everyone.

The first engines had an ENB40B crankshaft and con-rods with tappet chest covers and are known as 12G engines: - buyers of early BMC 1100 / 1300 cars had the option of 1098 cc or 1275 cc engines. The first 1275 cc engines were suffixed by engine number 12G and are extremely rare. These engines all had a 9 stud cylinder head, AEG510 cam, forged rocker assembly and the EN40B crank with smaller 1.5/8 inch journals, connecting rods, crankshaft diameter being the same size as the Cooper S engines. The cranks were all marked EN40B and dated. They also all used a single 1½ inch carburettor. This engine was only fitted to the very early MG, Wolseley, Riley Kestrel and Vanden Plas which were called the 1275 model.

The second engine to further complicate matters in September 1967 had a solid wall thin flange block and was suffixed 12H. This engine had 70 BHP engine an EN40B crank with 1.5/8 inch journals, and large valve 11 stud cylinder head. These engines appeared in late September 1967 and were only used in the Riley and MG 1300. It is very important to remember that the EN40B crankshaft out of this solid wall engine has a different centre main bearing width unlike the 12G engine.

The third engine used was suffixed 12H was a thick flange block had an EN16T crank with 1.3/4 inch journals, heavier connecting rods, same pistons and large valve 11 stud cylinder head. These engines date from November 1967 and were only used in the Riley 1300, MG 1300 and Austin / Morris 1300 GT. This same engine was also fitted to the Innocenti Cooper 1300”

I’m unconvinced that this is a factory 1275 ADO16 as I’ve never seen the Mini remote used in the ADO16 :D

Alan
Supersonic
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Re: morris 1100

Post by Supersonic »

I recall a conversation I had with the late great Allan G Webb who was a Development Engineer with BMC and worked on the design of the ADO16. Back then I asked him was there a big demand for the 1275cc upgrade in the 1100. I remember so well that he told me the 1100 name was a brand in its own right and that is why it was named the 1100 1275. Allan told me BMC never made a big issue about the 1275cc motor in the Mk1 car as this was the ace up their sleeve for the Mk2 upgrade.

Allan G Webb told me that in 1966 the 1275cc solid wall block and the 1275cc large journal crankshaft did not exist. The only way that BMC could produce a 1275cc transverse motor was to use the 1275cc block and crankshaft of the Cooper S. He told me the rest of the motor was purely 1275cc inline parts. :?:

Alan
goff
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Re: morris 1100

Post by goff »

It looks like it has got the 20 degree inlet manifold and normal exhaust manifold from 1300 car also.
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Costafortune
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Re: morris 1100

Post by Costafortune »

Early 1275 Sprite engine from '66 used S type con rods iirc and a solid wall block. According to a 1970 Glass's Guide the VdP 1100 was available with a 1275 option in June 1965 with Riley/MG/Wolseleys June 1967.
Supersonic
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Re: morris 1100

Post by Supersonic »

Costafortune wrote: Fri Dec 18, 2020 8:40 pm Early 1275 Sprite engine from '66 used S type con rods iirc and a solid wall block. According to a 1970 Glass's Guide the VdP 1100 was available with a 1275 option in June 1965 with Riley/MG/Wolseleys June 1967.
I know where there is a 1965 Carton Grey Vanden Plas 1100 “1275” with less than 15k miles on it. I hope to own it one day. Allan G Webb did say BMC offered the VP as a 1275 from June 1965. I’ve only ever seen 1966 cars with 1275cc factory engines and most were Vanden Plas and Riley Kestrels. :)

I never seen a Mk1 Austin or Morris 1100 fitted with the factory 1275cc motor. :)

Alan
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Costafortune
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Re: morris 1100

Post by Costafortune »

Supersonic wrote: Sat Dec 19, 2020 12:24 pm

I never seen a Mk1 Austin or Morris 1100 fitted with the factory 1275cc motor. :)

Alan
It was an option on twin carb 1100's only.
Supersonic
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Re: morris 1100

Post by Supersonic »

Costafortune wrote: Sun Dec 20, 2020 12:45 pm
Supersonic wrote: Sat Dec 19, 2020 12:24 pm

I never seen a Mk1 Austin or Morris 1100 fitted with the factory 1275cc motor. :)

Alan
It was an option on twin carb 1100's only.
Agreed, that is why I've never seen one :D

Alan
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