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Author Topic: K- 4 Vavle head on a MiniCooper Motor??  (Read 7110 times)

Offline KCinSB

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K- 4 Vavle head on a MiniCooper Motor??
« on: December 29, 2012, 12:29:55 PM »
 :loopy:  Has anyone ever heard of people somehow putting a K1100 head on the tiny MiniCooper engine?
I was told racers do it and get big HP gains.  Is this for real?  It seems like it would be a HUGE job to make all that stuff work.   Just curious.................       :bmwsmile
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Offline frankenduck

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Re: K- 4 Vavle head on a MiniCooper Motor??
« Reply #1 on: December 29, 2012, 12:54:36 PM »
I don't claim to be an expert on it but it's my understanding that on the old MCs the cylinder head exhaust ports are Y'd together somehow and putting a K 4V head on frees up the exhaust flow.  To a large extent the head "bolts right up" but you're right that there's a fair amount of mod work involved for the timing, exhaust, etc....

Though not a common mod it's not that uncommon either.

Google on it and you'll find a fair amount of info on the topic.


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Offline Chaos

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Re: K- 4 Vavle head on a MiniCooper Motor??
« Reply #2 on: December 29, 2012, 03:47:03 PM »
Remember, this is the original 998cc mini, not the new BMW-minis.  It was an archaic 2v pushrod engine with the intake and exhaust on the backside.  The K1 head pretty much bolts on, and the cylinder bores line up.  Updating it with a crossflow, DOHC 4V head makes a big difference :yow
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Offline KCinSB

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Re: K- 4 Vavle head on a MiniCooper Motor??
« Reply #3 on: December 29, 2012, 08:33:16 PM »
Wow, looking at the 2 photos sure tells the story!  Those little motors must really scream!  Thanks.
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No good turn goes unpunished, but it's fun to keep trying.........
1993 K1100RS, with LT Rack&Case, some old BSAs and Triumphs,... some even run!! Recent Dark Side foray... '65 XLCH tractor.

Offline Scott_

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Re: K- 4 Vavle head on a MiniCooper Motor??
« Reply #4 on: December 30, 2012, 08:42:23 AM »
There was a time when people were buying(and maybe still are to some extent) used K motors for just the head.
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Offline electric_monk

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Re: K- 4 Vavle head on a MiniCooper Motor??
« Reply #5 on: January 04, 2013, 07:18:22 AM »
Motorworks in the UK offer two kits for the Mini, one with the 8v head and the other with the 16v head.

http://www.motorworks.co.uk/vlive/Shop/Parts.php?T=5&NU=10&M=40&Ct=CA&SbCt=BA_10_40_CA_70
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