B-Series Mini engine transplant?

General Chat with an emphasis on BMC Minis & Other iconic cars of the 1960's. Includes information on MK1 Action days.
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mab01uk
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B-Series Mini engine transplant?

Post by mab01uk »

Anyone know more about this 'B' Series Mini racer or have more photos?
With those Weber carbs out front I guess it used a version of the original HRG-Derrington crossflow cylinder head for the B-Series below?
HRG-Derrington Heads:-
http://www.rhodo.citymax.com/HRG.html

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Paddock at Brands Hatch

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More Here:-
http://www.rhodo.citymax.com/f/HRG_story.pdf

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mab01uk
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Re: B-Series Mini engine transplant?

Post by mab01uk »

Another 'period' Mini engine transplant below, this time based on the Imp engine.......shame few of them survive today as they were so much more interesting than today's Honda Vtec conversions!

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I remember this Mini-Imp well and recently discovered this thread with some photos on the Ten Tenths Forum:-
http://tentenths.com/forum/showthread.php?t=122899

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Monty Guildford's Mini racer fitted with an Imp engine, he finished it in 1973 after an 18 month build.
The engine was built and tuned by George Bevan but the gear box was designed by my Monty and built by Peter Wise of Goodland engineering of Tonbridge Kent. The crank was a one off. Note also the exhaust coming out of the nearside A panel!

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Last edited by mab01uk on Fri Feb 08, 2019 9:44 am, edited 1 time in total.

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mk1
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Re: B-Series Mini engine transplant?

Post by mk1 »

The Imp engine is a far better bet than the B series one. The weight in the front must have been an issue!

The HRG / Derrington alloy head is a nice unit. I have had a couple, but never actually used one as I have never had a B series car.

These old engine swaps are interesting, but isn't that mainly because they are old. The modern swaps seem to be far better all round, more power, more reliable, better weight distribution.
Mark F
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mab01uk
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Re: B-Series Mini engine transplant?

Post by mab01uk »

I think they are more interesting than the modern engine swaps partly because they are old and for me nostalgic memories of them racing but also because most use some clever engineering to adapt to the Mini gearbox in sump arrangement. Probably due to a lack of many alternative compact front wheel drive gearboxes at the time, unlike today.

goff
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Re: B-Series Mini engine transplant?

Post by goff »

Looked for week then found the photo !!! Here is my B series in a mini :lol: , Space frame car , BUT all mini running gear , Front subframe was chopped a fair amount , cannot remember much about it as its 45 years + , mini swinging arm on the back and i think Triumph herald springs and shockers ??? , the engine fitted ok BUT it was front heavy , meaning most of the weight was forward of the front wheels , i think i used two shorter drive shafts or maybe two short AD16 , i remember welding the mini yokes to the 1800 yokes , but probably a fair bit of butchering , gearshift was ok because its cable :D :D , engine came out of a 1800 land crab £30 , rebored + reground crank , I fitted bigger valves and gas flowed , full race ST camshaft , Twin two inch SUs , i had to cut pockets in the block for the valves to clear on full lift , was it any good , NO , good talking point though , Built the car and everything else minimum tools , This included Stick welder , Grinder , 7lb hammer , hand drill and not forgetting the wrecking bar nothing else , Sold it to a grass tracker and he put the engine back in a landcrabb , i heard he did OK
The photo was taken at Marsh Lane Bomber track , Near Eckington , Sheffield . Happy days , also we went to Doncaster , York road . got me down as G.Allan ??
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Time Bandit
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Re: B-Series Mini engine transplant?

Post by Time Bandit »

Not a 'B' Series engine and nor do I have a pic...but I noticed this while hunting some stuff out. If you look at the image there is a small bit about a prize draw...Mini based rally car with a Maxi engine... :?
Had a look thru' the programme but it mentions nothing else about the draw or the prize so I don't know anything else about it. I imagine the handling would be err interesting with that lump stuck in the front of a Mini!
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Costafortune
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Re: B-Series Mini engine transplant?

Post by Costafortune »

It's a pity the Maxi engine was such a nail - if it was any good (i.e tuneable - they were quite robust) it would have been a decent conversion for a road going Mini with the 5 speed gearbox.

The Datsun Cherry 100A and 120A unit was a nicely engineered thing, gearbox in sump as well. The appear top have copied the B Series 1800/Princess clutch set up though.
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Exminiman
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Re: B-Series Mini engine transplant?

Post by Exminiman »

I believe the Datsun (Nissan) A series engine was licenced from BMC and then developed...

Very similar, ... :mrgreen:
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mab01uk
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Re: B-Series Mini engine transplant?

Post by mab01uk »

Time Bandit wrote:Not a 'B' Series engine and nor do I have a pic...but I noticed this while hunting some stuff out. If you look at the image there is a small bit about a prize draw...Mini based rally car with a Maxi engine... :?
Had a look thru' the programme but it mentions nothing else about the draw or the prize so I don't know anything else about it. I imagine the handling would be err interesting with that lump stuck in the front of a Mini!
Costafortune wrote:It's a pity the Maxi engine was such a nail - if it was any good (i.e tuneable - they were quite robust) it would have been a decent conversion for a road going Mini with the 5 speed gearbox.
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Last edited by mab01uk on Sun Feb 10, 2019 8:28 pm, edited 1 time in total.

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mab01uk
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Re: B-Series Mini engine transplant?

Post by mab01uk »

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This Mini was originally built by the custom car specialist Andy Saunders in 1992. Built on a new body shell using space frame rear end and 1750cc Austin Maxi engine and 5 speed gearbox. It has twin HIF6 SU carbs. The body is a KAT kit Featured in Fast Car magazine December 1991.

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