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Richard H
Joined: 03 Apr 2009 Posts: 2148 Location: Lincolnshire, UK
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Posted: Tue Apr 13, 2010 11:18 pm Post subject: Mini Manifold. |
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Quick question. My aunt has a 1987 998cc Mini Automatic. Bit modern for this forum maybe? Anyway it has failed the MOT on a cracked manifold and I have been told the carb flange is different on auto and manual Minis so the manifold is different. Is this true?
_________________ Richard Hughes |
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bob2
Joined: 06 Dec 2007 Posts: 1727 Location: Malta
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Posted: Wed Apr 14, 2010 8:14 am Post subject: |
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sorry rich but I've no idea. all i know is that the subframe for an auto is different to the manual one and that it!!
you could always try the mini forum, thay will be able to help you surely! |
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Rick Site Admin
Joined: 27 Apr 2005 Posts: 22447 Location: UK
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victor 101
Joined: 03 Apr 2009 Posts: 446 Location: East Yorkshire
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Posted: Wed Apr 14, 2010 9:02 am Post subject: |
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It maybe that it has a vacuum takeoff for the auto box, I have a repair manual for Mini automatic transmissions somewhere, I will try and find it later. |
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exbmc
Joined: 18 Jun 2009 Posts: 236 Location: Derby East Midlands
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Posted: Wed Apr 14, 2010 4:28 pm Post subject: mini manifold |
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Many years since I worked on mini's, but I recall that the auto's, certainly the original 850's, had a bigger bore manifold and larger carb than the manuals. This was to try to restore some of the performance lost through the auto box. |
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victor 101
Joined: 03 Apr 2009 Posts: 446 Location: East Yorkshire
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Posted: Wed Apr 14, 2010 10:40 pm Post subject: |
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victor 101 wrote: | It maybe that it has a vacuum takeoff for the auto box, I have a repair manual for Mini automatic transmissions somewhere, I will try and find it later. |
I think exbmc could be right, there is no mention of any link to the transmission other than throttle linkage. |
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bob2
Joined: 06 Dec 2007 Posts: 1727 Location: Malta
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Posted: Thu Apr 15, 2010 8:35 am Post subject: |
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most probably as exbmc and victor 101 said
Rick I htink yours mum's was a mark 1 countryman right?
so the most probable upgrade was in the form of a 1 1/2 inch su carb instead of the 1 1/4 fitted by the factory so that would mean that the reason to find an inlet manifold from an auto was the inlet's bore, more than anything else!!
He would have needed a bigger air filter as well since the small one fitted to 850's with the 1 1/4 su's would not fit on the bigger su |
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Rick Site Admin
Joined: 27 Apr 2005 Posts: 22447 Location: UK
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Posted: Thu Apr 15, 2010 9:05 am Post subject: |
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bob2 wrote: | most probably as exbmc and victor 101 said
Rick I htink yours mum's was a mark 1 countryman right?
so the most probable upgrade was in the form of a 1 1/2 inch su carb instead of the 1 1/4 fitted by the factory so that would mean that the reason to find an inlet manifold from an auto was the inlet's bore, more than anything else!!
He would have needed a bigger air filter as well since the small one fitted to 850's with the 1 1/4 su's would not fit on the bigger su |
yup that sounds about right, 1967 it was, plus it had the MG1100 cylinder head on it (now on my A40).
R _________________ Rick - Admin
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bob2
Joined: 06 Dec 2007 Posts: 1727 Location: Malta
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Posted: Fri Apr 16, 2010 8:45 am Post subject: |
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i think that cylinder head was very similar to the one fitted to 998 cooper engines, wouldnt mind one for my 998 mini, together with a set of twin su's!! |
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Rick Site Admin
Joined: 27 Apr 2005 Posts: 22447 Location: UK
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Richard H
Joined: 03 Apr 2009 Posts: 2148 Location: Lincolnshire, UK
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Posted: Fri Apr 16, 2010 11:43 am Post subject: |
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I think we've managed to source a secondhand one now, spoke to a Mini specialist and he confirmed Mini autos had a different carb/manifold until 1972, from then on it was the same. Now we've just got to struggle with the very rusty looking manifold studs to get it off
Thanks everyone _________________ Richard Hughes |
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bob2
Joined: 06 Dec 2007 Posts: 1727 Location: Malta
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Posted: Fri Apr 16, 2010 12:22 pm Post subject: |
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yes rick thats the one!!! want to sell?
Richard H, so that confirms what has been said in this post cause till 72 minis were still being fitted with the smaller su. |
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Richard H
Joined: 03 Apr 2009 Posts: 2148 Location: Lincolnshire, UK
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Posted: Fri Apr 16, 2010 1:20 pm Post subject: |
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That's right Bob, thanks everyone.
Should be back on the road soon _________________ Richard Hughes |
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