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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