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 Post subject: Which Cylinder Head?
PostPosted: Tue Sep 24, 2013 5:30 pm 
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Joined: Tue Jun 05, 2012 5:50 pm
Posts: 54
Whats your location?: Abbeyfeale Co limerick
Region: Southern
What Minis have you?: 1275 mpi sportspack 1999
1969 riley elf
Location: West Limerick
I sent my 1275 block to the engineering works today to have it bored out for 73.5mm pistons. Can anyone tell me which is the best cylinder head to use? I dont want to spend a fortune ordering one from mini spares. I think what I'm looking for is a metro head.


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 Post subject: Re: Which Cylinder Head?
PostPosted: Tue Sep 24, 2013 7:54 pm 
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Joined: Fri Feb 04, 2005 10:05 am
Posts: 4666
Whats your location?: Longford
Region: Eastern
What Minis have you?: 1971 Mini Marcos.
1984 Mini Sprite
PROJECT X
Modifications: 1380cc
Weber45
S/C CR gearbox and drop gears
Location: Longford
What compression were you going to run ?

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A fully carbon fiber Mini Marcos shell weighs just 7.25kg.


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 Post subject: Re: Which Cylinder Head?
PostPosted: Wed Sep 25, 2013 8:13 am 
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IMOC Paid Member

Joined: Tue Jun 05, 2012 5:50 pm
Posts: 54
Whats your location?: Abbeyfeale Co limerick
Region: Southern
What Minis have you?: 1275 mpi sportspack 1999
1969 riley elf
Location: West Limerick
Dont know what compression i need. Just want to build a fast engine for road use


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 Post subject: Re: Which Cylinder Head?
PostPosted: Wed Sep 25, 2013 9:24 am 
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Joined: Tue Jun 16, 2009 2:48 pm
Posts: 484
What Minis have you?: Mini miglea 1480cc

81' clubby estate
Location: Greystones,co Wicklow
What cc pistons did you get?


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 Post subject: Re: Which Cylinder Head?
PostPosted: Wed Sep 25, 2013 9:34 am 
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IMOC Paid Member

Joined: Tue Jun 05, 2012 5:50 pm
Posts: 54
Whats your location?: Abbeyfeale Co limerick
Region: Southern
What Minis have you?: 1275 mpi sportspack 1999
1969 riley elf
Location: West Limerick
Didn't get pistons yet. Hoping to bring it up to 1380cc. Guy in the engineering works is checking out pistons for me.


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 Post subject: Re: Which Cylinder Head?
PostPosted: Wed Sep 25, 2013 8:49 pm 
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IMOC Paid Member
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Joined: Fri Feb 04, 2005 10:05 am
Posts: 4666
Whats your location?: Longford
Region: Eastern
What Minis have you?: 1971 Mini Marcos.
1984 Mini Sprite
PROJECT X
Modifications: 1380cc
Weber45
S/C CR gearbox and drop gears
Location: Longford
You need to do a bit of homework, it's not just a matter of throwing a few bits together.

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A fully carbon fiber Mini Marcos shell weighs just 7.25kg.


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 Post subject: Re: Which Cylinder Head?
PostPosted: Sun Sep 29, 2013 9:40 pm 
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Joined: Mon Nov 07, 2011 9:45 pm
Posts: 241
Whats your location?: Claremorris
Mayo
Region: Western
What Minis have you?: none right now
Modifications: sold that one, looking for a new project
Location: Mayo
Hi all that depends on what you want out if it.
Do you want it to be used everyday / easy to drive or outright power high up the rev range.
Be warned if you built a screamer you won't like it when you won't get power below 4000 rpm.
Some suggestions.
Do your own head following the yellow bible. This can be done on a budget.
Or pay loads of money for a new head done by the likes of minispares.
Their heads come from Keith calver who has his own website too.
No harm in having a chat with him.
He also supplies nice cams. I used the re13ot with great results.
The sw5 cam from swift used to be a good cam too but tends to wear fast these days.
What kind of power are you looking for and what kind of driving will you be doing that's the main question you should be asking yourself.
Aim for good torque from early in the rev range. You won't regret it that way.
By the way I am selling a 2nd hand head already modified.


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 Post subject: Re: Which Cylinder Head?
PostPosted: Mon Sep 30, 2013 9:43 am 
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Joined: Mon May 09, 2005 12:49 pm
Posts: 4556
Whats your location?: Ballyhooly, North Cork
Region: Southern
What Minis have you?: 1967 Morris Cooper, 1967 Austin Mini auto, 1968 Wolseley Hornet x2, 1981 Clubman Estate
Location: Ballyhooly North Cork
Dan,

Was the block rebored before to 1293, 1310 etc? Once you wear out a 1380, that's it.

Billy


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 Post subject: Re: Which Cylinder Head?
PostPosted: Mon Sep 30, 2013 3:30 pm 
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IMOC Paid Member

Joined: Tue Jun 05, 2012 5:50 pm
Posts: 54
Whats your location?: Abbeyfeale Co limerick
Region: Southern
What Minis have you?: 1275 mpi sportspack 1999
1969 riley elf
Location: West Limerick
Bill

Went for 73.5mm pistons so that will be 1380. I have been told that with a kent 266 cam it should be a nice fast road engine.


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 Post subject: Re: Which Cylinder Head?
PostPosted: Mon Sep 30, 2013 4:14 pm 
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IMOC Paid Member
User avatar

Joined: Fri Feb 04, 2005 10:05 am
Posts: 4666
Whats your location?: Longford
Region: Eastern
What Minis have you?: 1971 Mini Marcos.
1984 Mini Sprite
PROJECT X
Modifications: 1380cc
Weber45
S/C CR gearbox and drop gears
Location: Longford
I always thought the 266 was a mild road cam.

_________________
Image

A fully carbon fiber Mini Marcos shell weighs just 7.25kg.


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 Post subject: Re: Which Cylinder Head?
PostPosted: Mon Sep 30, 2013 6:08 pm 
Offline
IMOC Paid Member

Joined: Mon Nov 07, 2011 9:45 pm
Posts: 241
Whats your location?: Claremorris
Mayo
Region: Western
What Minis have you?: none right now
Modifications: sold that one, looking for a new project
Location: Mayo
Md 266 is an old profile at this stage.
Much nicer cams available these days.


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