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 Posted: Oct 4, 2019 02:47AM
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“Sarcasm is the lowest form of wit but the highest form of intelligence,” wrote that connoisseur of wit, Oscar Wilde.

 Posted: Feb 3, 2012 12:23AM
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One Of A KInd anyone will ever find in north america as to the detail in mods done to this car in order to run such filter and have a closing Hood. Yet very easy to set things back to the original Hood which I kept.

 Posted: Feb 2, 2012 11:27PM
CLM
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US

that ALMOST looks like an Elf with a mk3+ mini grill with that air filter there!

Chris

 Posted: Feb 2, 2012 10:54PM
 Edited:  Feb 2, 2012 10:55PM
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I have a 7 port 1275 bored out .40 over and running a scatter pattern cam in my engine, modified hood to accept a ITG filter as just the rubber filter that goes on the webbers are not enought to keep the engine protected. As to the 7 port over a standard 1275 head there is crazy power. I took a trip to a show last year and hills with the 7 port head felt like running on flat ground.

 Posted: Jan 2, 2011 01:18AM
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I think I will go with the 7 port crossflow head based on what been written up on the bolt on horsepower based on a regular 1275 engine spec. And not to mention the sound of a webber never mind two webbers.

As to the filter a pop on screen filter in order not to modify my hood if fine even if I have to do a rebuild ever five years or so depending.

As to a Calver Head what would the horsepower be between your new choice of head  and that of a 7 port crossflow you think?  I would say a bit less if a 7 port head on a 1275 delivering about 100BHP on a 1275cc engine block..?? Even with a good---- porting, polished and flow test done to that 5 port Calver Head..

I just got to figure out which 7 port crossflow would be a good one , Yours that you had look very nice but that sold! So know way to get a feel as to the gains in power going 7 port crossflow over what a standard 12g940 head spec was giving in pulling power..  

 Posted: Jan 1, 2011 04:54PM
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US
Quote:
Originally Posted by Stageone

Brandonson!

Do you find a 7 port head on an A + engine with two webber carb burns more fuel than a 5 port head running a single webber carb or a single SU carb set up? And if so by about how much more? Why I am asking this question I have a single tank and if that is the case then won't get very far on a single tank of fuel and everyone knows the size of a mini fuel tank.

Im not sure but I would probably say yes it does burn more fuel. I changed my plans and sold my head to a freind of mine. I decided not to use it because you can't use a standard type air filter under the stock hood. You can only use screens for the air horns and they are not nearly as effective (when it comes to keeping the engine clean) as a K & N filter. I decided to use a Calver head with twin 1.5" Su carbs per my engine builders recommendation. 

 Posted: Dec 29, 2010 03:53PM
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Brandonson!

Do you find a 7 port head on an A + engine with two webber carb burns more fuel than a 5 port head running a single webber carb or a single SU carb set up? And if so by about how much more? Why I am asking this question I have a single tank and if that is the case then won't get very far on a single tank of fuel and everyone knows the size of a mini fuel tank.

 Posted: Dec 27, 2010 06:16PM
 Edited:  Dec 27, 2010 06:19PM
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US
Quote:
Originally Posted by Stageone

wonder where did you get your 7 port head to buy and at what cost for the head, and was it north america or UK? Did you have to modify your hood in anyway to use that set up..

I bought my head from Pierce manifolds in the USA and then sent it to MED engineering in the UK for porting. MED now sells the head already modified on their site.

The head will fit underneath the stock bonnet without modifications but you will be limited to what type of air filter you can use with the Weber DCOEs.

 Posted: Dec 27, 2010 04:16PM
 Edited:  Dec 27, 2010 04:18PM
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the Pierce alloy head is very different to the one tested by Vizard,

Originally there was the AKM Iron head, this was cast with 45mm diameter ports at the manifold face this head was really meant for full race engines and needed big cams big valves and high revs to get the best from it, this is the head Vizard tested

AKM sold the rights to minisport who made some changes to the casting to make the ports smaller to make it more applicable to road use, the inlet ports on these heads are 40mm dia at the manifold face.

the Peirce head has some more changes to it and is cast in alluminium, the valves are smaller in these heads at 33mm vs the 35mm of the minisport and AKM heads, also the inlet is shorter, with the manifold face being closer to the head also the plugs in these heads are 8mm dia vs the 10m dia of the previous heads.

the HRE and MED heads as mentioned  are peirce castings with larger valves.

 

 

 

 Posted: Dec 25, 2010 02:59PM
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wonder where did you get your 7 port head to buy and at what cost for the head, and was it north america or UK? Did you have to modify your hood in anyway to use that set up..

 Posted: Apr 29, 2010 08:14AM
 Edited:  Apr 29, 2010 08:15AM
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US

I just received my MED / Peirce 7 port head with the rockers. It is a phase 1 cylinder head for a street car. I will have the engine dyno tested and tuned by the end of the year (hopefully)

MED peirce head

 Posted: Jan 26, 2010 10:53AM
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Found Vizard's test in KYMA #1. I suppose I could fax the article to you.

The power of accurate observation is commonly called cynicism by those who have not got it. G.B.S. Sarcasm is the lowest form of wit. Oscar Wilde

//www.cupcakecooper.ca/

 Posted: Jan 25, 2010 12:14AM
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So many choices....

 Posted: Jan 24, 2010 04:53PM
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Here's the Elder 7 port, made in Oz.

//www.ausmini.com/forums/viewtopic.php?t=54673&highlight=elder

Kevin G

1360 power- Morris 1300 auto block, S crank & rods, Russell Engineering RE282 sprint cam, over 125HP at crank, 86.6HP at the wheels @7000+.

 Posted: Jan 24, 2010 04:13PM
 Edited:  Jan 24, 2010 05:58PM
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MiniMania Seven Port (based on Pierce casting)

//www.minimania.com/web/Item/C%2DAHT350/InvDetail.cfm

 

 

SC Billet seven port:

//www.turbominis.com/forums/index.php?p=vt&tid=338896

 

HRE seven Port (based on Pierce casting)

//www.turbominis.com/forums/index.php?p=vt&tid=339347

 

MED seven port (based on pierce casting)

//www.turbominis.com/forums/index.php?p=vt&tid=339188

 

 

It's been fun, but this place is done. I have no hatred, and appreciate the good times. But this place now belongs to Tony and his pink mini. 

 Posted: Jan 24, 2010 01:07PM
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GB

There is as always a third way.

The AKM/Mini Sport heads have their problems, porosity being the major one initially (though allegedly now cured), having no choice but to use Webers or throttle bodies and the port sizes are colossal.
The aluminium copies/development of this head also appear to have their limitations, mainly small valves and the same big port size.  (The std valves in the iron head are full 2mm bigger than the largest on offer in the aluminium).

Tucked away in the back of Mini Mag this month, there is an intriguing advert from Specialist Components for a billet 7-port head.  I phoned them on Friday to talk injection and asked after their new head.  4mm smaller ports than the AKM and larger valves as standard...  Will be launched to the public next weekend at the Bingley Hall show.

 Posted: Jan 24, 2010 10:51AM
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It would have been one of the original ones not the later versions.

The power of accurate observation is commonly called cynicism by those who have not got it. G.B.S. Sarcasm is the lowest form of wit. Oscar Wilde

//www.cupcakecooper.ca/

 Posted: Jan 24, 2010 10:28AM
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US

Did he test the Minisport head or the alloy 7 port from minimania and pierce? There is a HUGE difference in the two heads. (valve size, casting quality etc)

 Posted: Jan 24, 2010 10:27AM
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David Vizard tested that head in one of MiniWorlds, Keeping Your Mini Alive magazines.

The power of accurate observation is commonly called cynicism by those who have not got it. G.B.S. Sarcasm is the lowest form of wit. Oscar Wilde

//www.cupcakecooper.ca/

 Posted: Jan 24, 2010 10:24AM
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Who is Mr Obunga ? Anyway I want to know if anyone has had any real experience and or opinions of the head in real world use. What kind of cam was used ? What is the power output ? .etc. I did speak with someone @ MED the other day  in the UK and he gave me more than enough info. I will update this thread once I have Bill G. assemble my engine.

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