Classic Mini A-series engine

Classic Mini A-series engine page

• Firing order 1-3-4-2
• 8 valve cylinder head with siamese inlet ports
• capacity 850, 997, 998, 1100 1275cc
• Single or twin SU carbs or later models had bosh single point fuel injection
• Lucas distributor till EFI models

This is my engine bay once i took delivery of the car.  It does not look much, but started well and had no hints of smoke.  Not bad for a Mini A- series engine thats been stood for over a year.  Unfortunately I was unable to take it for a teast drive due to the suspension and steering damage.  As it turns out, this was a blessing in disguise as the bodyshell had lost most of its structural integrity and probably would have folded in half in the case of a heavy impact.

 

 

 

 

 

 

 

 

Plans for the future.

Once the body is repaired I plan to refit this engine, maybe with some light modifications.

• Gas Flowed cylinder head
• Longer duration and higher lift camshaft
• Lightened flywheel
• LCB exhaust manifold.
• Twin 1 1/4 SU HS2 carburetors
• Electronic points replacment

this is a temporary solution to try and make the car more fun on a budget while testing out the re-built suspension and brakes.  The more longer term goal is to instal an A-series 1380cc with a BMW k1200 16 valve head.  There are many kits and lots of advice out there and I will try to document most of the engine build as I go.  I have already purchased the head from Ebay, but the shell is tghe priority for now.

Here  is my most recent purchase.  A set of twin 1-1/4 SU HS2 carburetors fitted to an Alexander inlet manifold.  I had never heard of this manifold manufacturer.  After doing some research it would apear they were an early tuning specialist and these carbs were from a Mk 3 997cc Cooper S

SU carb part number is AUD 15 L + R

Here is some useful information on Mini Cooper engine and ancillary part identifications:

MK1 Cooper: Production 997 July 1961 – Nov 1963 Chassis No. Austin from C – A2S7 138301   998 Nov 1963 – Sept 1967   Morris from K – A2S4 138311   Engine Prefixes 997 9F- Sa – H H – High compression   9F- Sa – L L – Low compression   998 9FA – Sa – H   9FA – Sa – L   9FD – Sa – H   9FD – Sa – L

MK2 Cooper: Production 997 Oct 1967 – Nov 1969 Chassis No. Austin from C – AS2B 1064876   Morris from K – A2S6 1064877   Engine Prefixes 998 9FD – SA – H 3 synchro   9FD – XE – H 4 synchro   99H 377CH Dynamo   99H 378CH Alternator

MK1 Cooper S: Production 970 Jun 1964 – Apr 1965 Chassis No. Austin from C – A2S7 384101   Morris from K – A2S4 384601   Engine Prefixes 970 9F – SA – X   9FD – SA – X   9FE – SA – X   1071 9F – SA – H   9FD – SA – H   1275 9F – SA Y   9FD – SA – Y   9FE – SA – Y

MK2 Cooper S: Production 970 Oct 1967 – Mar 1970 Chassis No. Austin from C – A2SB 1066320   Morris from K – A2S6 1066321   Engine Prefixes 9F – SA – Y 3 Synchro   9F – XE – Y 4 Synchro

MK3 Cooper S: Production Mar 1970 – Jun 1971 Chassis No. ends at XAD – 1 45898A   Engine Prefixes 12H 397F Dynamo   12H 398F Alternator                        SU Carb I.D tags 997 Cooper AUD 15   998 Cooper AUD 104   970 S AUD 151   1071 S AUD 99   1275 S AUD 146   1275 S MK3 AUD 440

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