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Crossflow 8-port Vs good 5-port
https://www.ausmini.com/forums/viewtopic.php?f=5&t=51001		 Page 1 of 3
Author:  Bubbacluby [ Mon Mar 09, 2009 6:46 am ]
Post subject:  Crossflow 8-port Vs good 5-port
I was wondering is ther any/much benfit of an 8-port cross flow (eg westlake) compared against a 5-port worked by GR??
IM just thinking about my options, If i could find a cross flow it would be for a largebore stroker motor.

Just wasnt sure about the advantage (i mean in approx HP increase airflow etc)

Thanks all
Brenton
Author:  mickmini [ Mon Mar 09, 2009 7:47 am ]
Post subject: 
mostly in the hip pocket.... even if you could find a weslake head.
Author:  albino235 [ Mon Mar 09, 2009 8:09 am ]
Post subject: 
There have been quite a few threads on this, search weslake, arden, etc.
The general consensus is that they will out perform the 5 port head but the cost of setting one up is pretty high. I think they start at around $2000 for the casting, then you need to add machining, valves, etc.
Author:  Lillee [ Mon Mar 09, 2009 10:42 am ]
Post subject: 
Try $5000 all up, IF you can source any
Author:  drmini in aust [ Mon Mar 09, 2009 10:56 am ]
Post subject: 
Pretty sure the Elder 8 port alloy one is still available, check with Graham Russell. About $4K (+ labour) fitted, + carbs or injection.
8 port will give better midrange torque than 5 port, at same max HP tuning level.
Author:  Mick [ Mon Mar 09, 2009 11:20 am ]
Post subject: 
Would love to try one out. And they have a classic works feel about them.

I'll wait till uni is finished before I try that one on the missus however...
Author:  simon k [ Mon Mar 09, 2009 12:01 pm ]
Post subject: 
Mick wrote:
they have a classic works feel about them.


something seriously cool about opening up the bonnet of a classy mini and seeing a crossflow on there, looking like it was done at Abingdon

it's great looking at the motors of the NSW super-minis
Author:  drmini in aust [ Mon Mar 09, 2009 12:14 pm ]
Post subject: 
simon k wrote:
Mick wrote:
they have a classic works feel about them.


something seriously cool about opening up the bonnet of a classy mini and seeing a crossflow on there, looking like it was done at Abingdon

it's great looking at the motors of the NSW super-minis

I love these pics of Dean Canto's pickup-

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Author:  Morris 1100 [ Mon Mar 09, 2009 2:50 pm ]
Post subject: 
I have a heap of five port Weslake heads. 8)
Author:  TheMiniMan [ Tue Mar 10, 2009 1:02 am ]
Post subject: 
hee hee,,, yeah don`t we all :-)

But,,, in all seriousness,,, the question is about an 8 port vs a good 5 port,,, well i have to say that it`s very hard for a good 4 port to beat a good 8 port on the track,,, mid range & upper end (because of that wonderfull mid range) is just very hard to beat,,, but i`ve seen some "not so good" 8 ports too

so,,, "Good" 5 port against a "Good" 8 port,,, well the 8 port wins all day every day & especially sunday & then sells on monday :-) (sorry ,,, old adverts stick in my head) :-)
Author:  mickmini [ Tue Mar 10, 2009 4:28 am ]
Post subject: 
TheMiniMan wrote:
hee hee,,, yeah don`t we all :-)

so,,, "Good" 5 port against a "Good" 8 port,,, well the 8 port wins all day every day & especially sunday & then sells on monday :-) (sorry ,,, old adverts stick in my head) :-)


Best get your 8 ports (not very weslakey ones at that) on tracks various winning on sundays so's you can sell more of em on mondays eh? :wink:
Author:  Bubbacluby [ Tue Mar 10, 2009 5:15 am ]
Post subject: 
TheMiniMan wrote:
hee hee,,, yeah don`t we all :-)

But,,, in all seriousness,,, the question is about an 8 port vs a good 5 port,,, well i have to say that it`s very hard for a good 4 port to beat a good 8 port on the track,,, mid range & upper end (because of that wonderfull mid range) is just very hard to beat,,, but i`ve seen some "not so good" 8 ports too

so,,, "Good" 5 port against a "Good" 8 port,,, well the 8 port wins all day every day & especially sunday & then sells on monday :-) (sorry ,,, old adverts stick in my head) :-)


thankyou Matt thats exactly what i wanted to know..

I didnt realise that the westlakes were as rare as they were (i read some old posts), hmmm there goes that idea - maybe consider 7 ports now :lol:
Author:  drmini in aust [ Tue Mar 10, 2009 6:45 am ]
Post subject: 
Rumour has it that the porting on the AKM 7 port is not the best. The Weber carbs bolt straight to the head and although the intake holes are big, the port shape is not great.
I'd dig a little deeper into this before I bought one... :wink:


OTOH, apparently this alloy `Weslake 8 port copy' head is da bomb, but supply is a problem...
Image
Author:  poeee [ Tue Mar 10, 2009 9:06 am ]
Post subject: 
drmini in aust wrote:
OTOH apparently the alloy `Weslake 8 port copy' head is da bomb, but supply is a problem...

Image


Yes please!!!
Author:  Asphalt [ Tue Mar 10, 2009 9:44 am ]
Post subject: 
Did you know abput the experimental 'HEMI' crossflow head by BMC/BL?

It's a real crossflow head, as the valves sit in line and not side by side.
Plus the hemispherical combustion chamber should give some improvements.

It was made at the time production of the Cooper 'S' came to an end but found to be too expensive. Intended for use with a 998, but from the looks of it never ran.

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Cheers,
Jan
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