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Alloy X flow seven porter has arrived

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Mick

Post subject:

Posted: Mon Aug 23, 2010 9:50 pm

SooperDooperMiniCooper ExpertEngineering

Joined: Fri Apr 29, 2005 9:46 am
Posts: 18887
Location: Under the bonnet son!

Is there a good reason for this inlet/exhaust flow rate comparison to be so skewed?

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SooperDooperMiniCooperExpertEngineering

All garage work involves equal measures of enthusiasm, ingenuity and a fair degree of irresponsibility.

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drmini in aust

Post subject:

Posted: Mon Aug 23, 2010 9:56 pm

religious status

Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39752
Location: near Baulkham Hills, NSW

SuperCooper wrote:

Ok so Ive had my 7 port (pierce) for a few months. It is getting ported ATM. Porter has tested it on his flow bench. Inlets flow 61cfm at 400' lift standard. Exhaust flows 31cfm at 400' lift standard. After he has taken out the seats and guides and reshaped them along with the exhaust ports it flows 45cfm @ 400'lift. I have no idea what other heads do , and it is probably like dyno figures in terms of variation between operators and machines. But the exhaust is now flowing 73% of the inlet which is a great improvement from 50.3 % standard. Well done to him!

Cheers.

Those numbers do sound low, I wonder what pressure is he using? 10" maybe, not 25"?

My stroker's 12G1316 head, the S inlets flowed 116CFM on GR's flowbench.
Stock these flow around 90.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:

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SuperCooper

Post subject:

Posted: Mon Aug 23, 2010 10:14 pm

998cc

Joined: Mon Feb 05, 2007 10:53 pm
Posts: 658
Location: NSW

I am new to flow bench data so, no idea. I wiil however try to find out more details about how it was done. At least its a start on some info!

No problem.

Cheers.

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Now with 2 extra ports!

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SuperCooper

Post subject:

Posted: Tue Aug 24, 2010 11:04 am

998cc

Joined: Mon Feb 05, 2007 10:53 pm
Posts: 658
Location: NSW

CFM measuresd at 10".

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Now with 2 extra ports!

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low n blown

Post subject:

Posted: Tue Aug 24, 2010 6:02 pm

1098cc

Joined: Tue Aug 24, 2004 3:57 pm
Posts: 1478
Location: queensland

Head arrived today. Awaiting carby's hopefully tomorrow. Sent separately to avoid taxes :lol:

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1970 Cooper S ex-Bathurst & ATCC
1964 Austin Cooper S ex-Group C race car
1967 Morris Cooper S ex-Group B
1962 Mini Speed sports sedan
1968-71 ex-Peter Manton Shell car

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mikejnr

Post subject:

Posted: Wed Aug 25, 2010 2:18 pm

848cc

Joined: Fri Jul 06, 2007 12:21 pm
Posts: 57
Location: Sydney

hope fully paying for mine later today.

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low n blown

Post subject:

Posted: Wed Aug 25, 2010 5:03 pm

1098cc

Joined: Tue Aug 24, 2004 3:57 pm
Posts: 1478
Location: queensland

mikejnr wrote:

hope fully paying for mine later today.

Noice.

Pulled the valves out for a closer look. They definitely need some cleaning work. Ports are plenty big enough. Much to do around the back of the valves and guides. Chambers could do with some work too, and the valves could be bigger, but hey, not bad for the money and a good starting point.

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1970 Cooper S ex-Bathurst & ATCC
1964 Austin Cooper S ex-Group C race car
1967 Morris Cooper S ex-Group B
1962 Mini Speed sports sedan
1968-71 ex-Peter Manton Shell car

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Post subject:

Posted: Wed Aug 25, 2010 8:31 pm

1275cc

Joined: Wed Jan 19, 2005 1:52 pm
Posts: 2582
Location: Brisbane

I'm not an expert on engine builds so can't comment on Low & Blown thoughts on all of the work that needs to be done on these heads. Sorry if I mislead anyone.
Looks better than a five port. I was happy.
I do know value for money though.
Enough from me for a while........................................

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simon k

Post subject:

Posted: Wed Aug 25, 2010 8:55 pm

Yay For Hay!

Joined: Wed Sep 08, 2004 9:27 pm
Posts: 15912
Location: Wodonga - Vic/NSW border

sounds like buying the head and spending $500 on a port job still makes it a very cheap crossflow head :!:

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low n blown

Post subject:

Posted: Thu Aug 26, 2010 7:25 am

1098cc

Joined: Tue Aug 24, 2004 3:57 pm
Posts: 1478
Location: queensland

TK wrote:

Dont get me wrong TK, very happy with the head, still good value esp with the carbys. I see it as getting a good start on what can potentially be a very good thing

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1970 Cooper S ex-Bathurst & ATCC
1964 Austin Cooper S ex-Group C race car
1967 Morris Cooper S ex-Group B
1962 Mini Speed sports sedan
1968-71 ex-Peter Manton Shell car

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TheMiniMan

Post subject:

Posted: Thu Aug 26, 2010 4:16 pm

Bimmer Twinky

Joined: Mon Sep 06, 2004 4:36 pm
Posts: 8606
Location: Brisbane

& just imagine one of my single overhead cam carriers on-top of it :-)

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No offence intended here but--> anyone writing a book about minis 30 years ago may not have experienced such worn or stuffed-with components as we are finding these days.

You should put your heart & soul into everything you do.

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afh001

Post subject:

Posted: Thu Aug 26, 2010 4:24 pm

848cc

Joined: Sun Nov 06, 2005 11:41 am
Posts: 192
Location: Melbourne

TheMiniMan wrote:

& just imagine one of my single overhead cam carriers on-top of it :-)

eh? Care to fill us in a bit more on that? Been playing with the CNC again have we?

Andrew

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TheMiniMan

Post subject:

Posted: Thu Aug 26, 2010 4:43 pm

Bimmer Twinky

Joined: Mon Sep 06, 2004 4:36 pm
Posts: 8606
Location: Brisbane

I just love makin stuff :-)

we`re getting there with this one,,, don`t hold your breath tho,,, you should all know by now,how slow i am to produce things :-)

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afh001

Post subject:

Posted: Thu Aug 26, 2010 5:15 pm

848cc

Joined: Sun Nov 06, 2005 11:41 am
Posts: 192
Location: Melbourne

Wow! Is there anything your not making?!?! Good stuff!

Andrew

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low n blown

Post subject:

Posted: Thu Aug 26, 2010 5:29 pm

1098cc

Joined: Tue Aug 24, 2004 3:57 pm
Posts: 1478
Location: queensland

TheMiniMan wrote:

I just love makin stuff :-)

we`re getting there with this one,,, don`t hold your breath tho,,, you should all know by now,how slow i am to produce things :-)

Crikey big fella you have some inspiration. You never cease to amaze me but shouldnt you finish/fine tune/develop the twinky kits and market them before moving onto another project? You have a good product with them, and something sure to be profitable for you. Focus Matt, focus.

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1970 Cooper S ex-Bathurst & ATCC
1964 Austin Cooper S ex-Group C race car
1967 Morris Cooper S ex-Group B
1962 Mini Speed sports sedan
1968-71 ex-Peter Manton Shell car

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