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Home > Show Us Yours! > K1200RS -sectioned head

johnK

1425 Posts
Member #: 690
Post Whore

Norfolk

A few sections through a ccylinder head of a K1200RS (one cylinders worth)

- cue one of the major reasons for the head flowing like it does - the very nice and long short turn radius on the inlet side - if you ar eporting your own head be careful in this area.

As you can see there is plenty of meat to work with in the walls and a nice thick deck.

cheers

JK









If Carling made Mini engines
it would probably be like this one!


Jimster
Site Admin

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9403 Posts
Member #: 58
455bhp per ton
12 sec 1/4 mile road legal mini

Sunny Bridgend, South Wales

thanks for this John, you can see why the heads seem to run so cool looking at the water ways.

Team www.sheepspeed.com Racing

On 15th May, 2009 TurboDave said:

I think the welsh one has it right!


1st to provide running proof
of turbo twinkie in a car and first to
run a 1/4 in one!!

Is your data backed up?? directbackup.net one extra month free for all Turbo minis members, PM me for detials


Joe C

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12307 Posts
Member #: 565
Carlos Fandango

Burnham-on-Crouch, Essex

Nice one!!

as you say, the inlet is a nice shape, for a std port, little bit of a change on the short side of the exhaust but still pretty good.

John do you know if the 1200 casting is any different to the 1100 one or it it just machining differences?

On 28th Aug, 2011 Kean said:
At the risk of being sigged...

Joe, do you have a photo of your tool?



http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1

https://joe1977.imgbb.com/



Sprocket

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11046 Posts
Member #: 965
Post Whore

Preston On The Brook

John I hope that was a 'dropped' head

Nice!!

If any one wants pictures of a sectioned 850 block, just shout.

Is there anything else we can cut up *tongue*

On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be...
So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'...


On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........


johnK

1425 Posts
Member #: 690
Post Whore

Norfolk

the casting is different to the 1100 ones only i nthat it is a new casting tool - probably changed for the 1200 intorduction. The 1200 heads have the cast in bump for the vertical oil feed to the heads - but not the drilling, on these engines the oil is fed into the cam gallery via the chain cover - slightly odd if you ask me! also the 1200 has extra fixings on the head for the chain cover - with respect to keeping it in contact to ensure pressure isn't lost - ref oil feed hole!!! this doesn't alter the conversion parts in any way.

Jim - yes all that water plus ally = nice cooling!

If Carling made Mini engines
it would probably be like this one!


johnK

1425 Posts
Member #: 690
Post Whore

Norfolk

Spock - I have to admit the head "looked" good to me - but it didn't have any valves etc so in the big saw it went.

- you remind me I need to send you some pics of mini engines for you to look at which may be useful to you!!

JK

If Carling made Mini engines
it would probably be like this one!


johnK

1425 Posts
Member #: 690
Post Whore

Norfolk

the casting is different to the 1100 ones only i nthat it is a new casting tool - probably changed for the 1200 intorduction. The 1200 heads have the cast in bump for the vertical oil feed to the heads - but not the drilling, on these engines the oil is fed into the cam gallery via the chain cover - slightly odd if you ask me! also the 1200 has extra fixings on the head for the chain cover - with respect to keeping it in contact to ensure pressure isn't lost - ref oil feed hole!!! this doesn't alter the conversion parts in any way.

Jim - yes all that water plus ally = nice cooling!

If Carling made Mini engines
it would probably be like this one!


Joe C

User Avatar

12307 Posts
Member #: 565
Carlos Fandango

Burnham-on-Crouch, Essex

ah ok,

so waterways etc are the same between the 1100 and 1200.



On 28th Aug, 2011 Kean said:
At the risk of being sigged...

Joe, do you have a photo of your tool?



http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1

https://joe1977.imgbb.com/



Sprocket

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11046 Posts
Member #: 965
Post Whore

Preston On The Brook




On 27th of Oct, 2007 at 09:33pm johnK said:
Spock - I have to admit the head "looked" good to me - but it didn't have any valves etc so in the big saw it went.

- you remind me I need to send you some pics of mini engines for you to look at which may be useful to you!!

JK


would cost more to fit it out with valves, cheaper to get another complete jobbie. I'll let you off budy. I knew you would have a good reason, even if it was just the cost of reearch and development*wink*

Yeh, fire the pictures over whenever*happy*

On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be...
So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'...


On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........


johnK

1425 Posts
Member #: 690
Post Whore

Norfolk

yes the waterways etc are the same - good old bmw not changing anything without cause!

JK

If Carling made Mini engines
it would probably be like this one!


Miniwilliams

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5329 Posts
Member #: 140
Proven 200+bhp & Avon Park 05,06,07 Class D 3rd place

WOW Top work John.

Best 1/4 mile 13.2 seconds @116 mph
First 5 port miniturbo to make over 200 bhp on a carb?
First 5 port miniturbo to make over 200 bhp on Injection?

http://www.mattwoodsphotography.com


minimole23

4304 Posts
Member #: 1321
Post Whore

Wiltshire




On 27th of Oct, 2007 at 09:28pm Mini Sprocket said:
John I hope that was a 'dropped' head

Nice!!

If any one wants pictures of a sectioned 850 block, just shout.

Is there anything else we can cut up *tongue*


That would be good sprocket.

All these recent threads about bimmer twinky conversions is tempting me to hoard a head I may never use!

On 7th Oct, 2010 5haneJ said:
yeah I gave it all a good prodding


matty

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8297 Posts
Member #: 408
Turbo Love Palace Fool

Aylesbury

Nice...Mount it to a bit of wood and sell it on ebay John, you'll get a fortune for it! *laughing*

https://www.facebook.com/pages/Fusion-Fabri..._homepage_panel

www.fusionfabs.co.uk



1/4mile in 13.2sec @ 111 terminal on 15psi


Sprocket

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11046 Posts
Member #: 965
Post Whore

Preston On The Brook




On 28th of Oct, 2007 at 09:59am minimole23 said:



On 27th of Oct, 2007 at 09:28pm Mini Sprocket said:
John I hope that was a 'dropped' head

Nice!!

If any one wants pictures of a sectioned 850 block, just shout.

Is there anything else we can cut up *tongue*


That would be good sprocket.

All these recent threads about bimmer twinky conversions is tempting me to hoard a head I may never use!


I'll see what i can do later*wink*

On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be...
So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'...


On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........


mini93

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834 Posts
Member #: 2017
Post Whore

Warwick.

got an old sectioned block you can put it on? might show how well they line up...gives you somthing else to chop aswell!

David.


johnK

1425 Posts
Member #: 690
Post Whore

Norfolk

I may have to get Colin to do that as he has the sections of a 1275 block!

JK

If Carling made Mini engines
it would probably be like this one!


mini93

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834 Posts
Member #: 2017
Post Whore

Warwick.

drats, doesnt really look like theres much area to cut away for lowering the compression ratio :(

David.


Sprocket

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11046 Posts
Member #: 965
Post Whore

Preston On The Brook

You could get the whole deck of the head welded and then skim it flat again, youd only need 1 or 2 mm, oh and some one who can do a decent weld, and lots of it

On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be...
So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'...


On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........


mini93

User Avatar

834 Posts
Member #: 2017
Post Whore

Warwick.

happen to know anyone??
i dont like the idea of decompression plates somthing strange about a slab of metal surounded by 2 headgaskets

David.


Turbo Shed

1303 Posts
Member #: 30
Post Whore

Epsom, Surrey

what about using motor bike pistons, they have the valve cut outs and have a shorter gudgen pin to crown height, i've seem them used in a historic rally car with good results.


Jimster
Site Admin

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9403 Posts
Member #: 58
455bhp per ton
12 sec 1/4 mile road legal mini

Sunny Bridgend, South Wales




On 28th of Oct, 2007 at 11:27pm Mini Sprocket said:
You could get the whole deck of the head welded and then skim it flat again, youd only need 1 or 2 mm, oh and some one who can do a decent weld, and lots of it


Something like this...?


Attachments:

Team www.sheepspeed.com Racing

On 15th May, 2009 TurboDave said:

I think the welsh one has it right!


1st to provide running proof
of turbo twinkie in a car and first to
run a 1/4 in one!!

Is your data backed up?? directbackup.net one extra month free for all Turbo minis members, PM me for detials


matty

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8297 Posts
Member #: 408
Turbo Love Palace Fool

Aylesbury

Is that your head Jim?

https://www.facebook.com/pages/Fusion-Fabri..._homepage_panel

www.fusionfabs.co.uk



1/4mile in 13.2sec @ 111 terminal on 15psi


Jimster
Site Admin

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9403 Posts
Member #: 58
455bhp per ton
12 sec 1/4 mile road legal mini

Sunny Bridgend, South Wales

yes matty

Team www.sheepspeed.com Racing

On 15th May, 2009 TurboDave said:

I think the welsh one has it right!


1st to provide running proof
of turbo twinkie in a car and first to
run a 1/4 in one!!

Is your data backed up?? directbackup.net one extra month free for all Turbo minis members, PM me for detials


Sprocket

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11046 Posts
Member #: 965
Post Whore

Preston On The Brook

Jimster, what i meant was, adding an extra 2mm to the deck, rather than just dry decking *wink*

LOL, you would have to be carefull not to warp the head

On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be...
So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'...


On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........


Joe C

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12307 Posts
Member #: 565
Carlos Fandango

Burnham-on-Crouch, Essex

Jim thats pretty impressive,

make mw wonder if it would be possible/practical/easier to to weld on a 3-4mm thick plate on instead.

On 28th Aug, 2011 Kean said:
At the risk of being sigged...

Joe, do you have a photo of your tool?



http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1

https://joe1977.imgbb.com/


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