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TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: KCinSB on December 29, 2012, 12:29:55 PM

Title: K- 4 Vavle head on a MiniCooper Motor??
Post by: KCinSB 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

Title: Re: K- 4 Vavle head on a MiniCooper Motor??
Post by: frankenduck 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.

(http://lh5.ggpht.com/_EhOejB9NOmA/SRPNWgX364I/AAAAAAAABaU/3R9Amj3nCgk/s640/24102008388.jpg)

Title: Re: K- 4 Vavle head on a MiniCooper Motor??
Post by: Chaos 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

Title: Re: K- 4 Vavle head on a MiniCooper Motor??
Post by: KCinSB 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.

Title: Re: K- 4 Vavle head on a MiniCooper Motor??
Post by: Scott_ 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.

Title: Re: K- 4 Vavle head on a MiniCooper Motor??
Post by: electric_monk 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 (http://www.motorworks.co.uk/vlive/Shop/Parts.php?T=5&NU=10&M=40&Ct=CA&SbCt=BA_10_40_CA_70)