Since the mk1 has a magic wand gear stick can I still just fit any mini engine to it?
Mk1 Engine Upgrade
Started by
mini77
, Feb 17 2011 07:58 PM
7 replies to this topic
#2
mk1leg
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Crazy About Mini's
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Posted 17 February 2011 - 08:12 PM
Hi..Do mean fit new same power 850cc or 998cc or 1098 or 1275 if the last 2 then no as you will have to modify the gearbox top faces to alloy the crank to rotate freely............. 
#3
mini77
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Super Mini Mad
Posted 17 February 2011 - 08:38 PM
if the last 2 then no as you will have to modify the gearbox top faces to alloy the crank to rotate freely.
Hi thanks for the reply, yes I want to fit a 1275 engine. Will it cost alot to modify the gearbox?
#4
Cooperman
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Uncle Cooperman, Voted Mr TMF 2011
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Posted 17 February 2011 - 09:55 PM
if the last 2 then no as you will have to modify the gearbox top faces to alloy the crank to rotate freely.
Hi thanks for the reply, yes I want to fit a 1275 engine. Will it cost alot to modify the gearbox?
It won't cost anything so long as you have some round-ended rotary files, some engineer's 'blue' marking fluid and a variable-speed power drill.
Then you put some 'blue onto the con rods where they hit the ncasing, lower the engine onto the box without any interface gaskets and turn the engine so that the 'blue' marks the box where the rods hit. File away and keep on repeating this until the rods/big ends clear the box with a bit to spare. Take care not to file through the casing!
#5
bmcecosse
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Posted 17 February 2011 - 10:55 PM
It does make for a very thin/weak casing. And of course - the gearbox would need to be an empty casing - so the filings don't get into all the moving parts.
#6
Cooperman
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Uncle Cooperman, Voted Mr TMF 2011
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Posted 17 February 2011 - 11:23 PM
It does make for a very thin/weak casing. And of course - the gearbox would need to be an empty casing - so the filings don't get into all the moving parts.
Absolutely correct there! Also, those early 'wand-type' 'boxes had plain bushes in certain places where the later boxes have needle-rollr bearings.
A wand-type box with a 1275 lump is not really advisable.
#7
mini77
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Super Mini Mad
Posted 17 February 2011 - 11:58 PM
A wand-type box with a 1275 lump is not really advisable.
Why is this? Also where all mk1's fitted with a wand type box?
Edited by mini77, 17 February 2011 - 11:58 PM.
#8
Cooperman
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Uncle Cooperman, Voted Mr TMF 2011
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Posted 18 February 2011 - 12:12 AM
A wand-type box with a 1275 lump is not really advisable.
Why is this?
Because the casing becomes thin after machining to take the 1275 and because the wand-type gearbox has inferior bearings and poor gear ratios.
Also where all mk1's fitted with a wand type box?
No, the Mk. 1 Cooper and Cooper 'S' had a different gearbox casing with an aluminium remote-type gear change linkage.
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