Mini 8 port CAST IRON head
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From: John_H on 30 Sep 2009 17:08 Noddy wrote: >"John_H" <john4721(a)inbox.com> wrote in message >news:ou86c5dks0ji3vdfasdmd1t6q38u85491f(a)4ax.com... > >> Which tells you what about the camshaft? > >That he was the only person on earth who used a conventional camshaft and >got it to work with an 8 port valve sequence. You can forget about the Webers then... his rocker gear would've been the really clever bit! :) -- John H
From: Noddy on 30 Sep 2009 19:19 "John_H" <john4721(a)inbox.com> wrote in message news:77h7c59so5p69lbso9j5945frcmvrs9lnp(a)4ax.com... > You can forget about the Webers then... his rocker gear would've been > the really clever bit! :) Lol :) -- Regards, Noddy.
From: Noddy on 1 Oct 2009 00:28 "hippo" <am9obmhAc2hvYWwubmV0LmF1(a)REGISTERED_USER_usenet.com.au> wrote in message news:ha0tea$3qi$1(a)news.eternal-september.org... > Far from a few decades earlier, the prototype 7 port Alexander head > probably predated the Mini. This page is worth a read if anyone's > interested. It also mentions Arden and MoWoG x flows, but I don't know if > the former is just in the context of sub litre engines or not. Cheers > http://fat.ly/cilu1 Interesting article, thanks. It strikes me as more than a little odd that someone would go to the trouble of casting up a crossflow head only to make it a siamesed inlet configuration, and I can see very little benefit over the standard 5 port head myself. Harry Ratcliffe, of British Vita Racing & Tuning is quoted in the article as saying "The Alexander was the best Xflow head I used on an A series engine" in spite of him apparently having experience with the Arden head. Why he was able to get that head to perform better than the Arden head I can't tell you, but just from looking at the photo's I would expect that it's advantage over a 5 port was probably mainly due to it's large valves and chamber shapes. The port layout itself doesn't appear to over any major advantage at all. It's also interesting to note the reference to the "Mowog" crossflow head, as these things seem to be a bit of a mystery. From what I've been able to gather, both from my own sources and those floating around the internet, there is some doubt as to whether BMC ever made any of their own crossflow head castings, and if they did any detail about them is particularly scant. I read a comment once some time ago from a retired BMC engineer who had a 45 year professional association with Mini's at the factory and he claimed that BMC did indeed make such a head, but they only ever made three experimental castings which proved unsuccessful and didn't see the light of day. He also never mentioned if they were cast iron or alloy. The term "Mowog crossflow" seems to have become a pretty generic description for any crossflow head that will bolt onto an A series engine, however *some* early versions of the Arden alloy head actually had the word "MOWOG" cast into their lower front face in large letters at the gasket line right under the number two inlet port, with the number "CAHT 346" cast at the same level under the number four spark plug. "CAHT 346" is the BMC special tuning part number for the bare Arden head casting. The term "Mowog crossflow" has been used a great many times in various sources when referring to the Arden head, and to my mind that suggests that it's more than likely anyone referring to a "mowog head' is indeed talking about the Arden head as far as crossflow heads are concerned. For some reason known only to him, Ozone is hell bent on proving the existence of a BMC factory made cast iron Crossflow head that he refers to as the "Mowog head", and it's existence as an official BMC special tuning part either did or didn't appear on any official parts catalog depending on his mood. Such a head doesn't appear in any of the catalogs I have between 1967 and 1972, but then I don't know if I have the full set and there *may* have been a list printed on April 1st 1968 that showed such a head as being available and was only current for two weeks. I f such a head actually exists I have no idea as to what it is, and to be totally honest I don't think he does either. The homologation list he cited recently as "proof" of the existence of such a head showed nothing other than a Weslake head with a BMC part number, which mean nothing other than BMC had allocated a part number to the things for their own use just like they did with the Arden head. -- Regards, Noddy.
From: jonz on 1 Oct 2009 04:19 Noddy wrote: > "hippo" <am9obmhAc2hvYWwubmV0LmF1(a)REGISTERED_USER_usenet.com.au> wrote in > message news:ha0tea$3qi$1(a)news.eternal-september.org... > >> Far from a few decades earlier, the prototype 7 port Alexander head >> probably predated the Mini. This page is worth a read if anyone's >> interested. It also mentions Arden and MoWoG x flows, but I don't know if >> the former is just in the context of sub litre engines or not. Cheers >> http://fat.ly/cilu1 > > Interesting article, thanks. > > It strikes me as more than a little odd that someone would go to the trouble > of casting up a crossflow head only to make it a siamesed inlet > configuration, and I can see very little benefit over the standard 5 port > head myself. Harry Ratcliffe, of British Vita Racing & Tuning is quoted in > the article as saying "The Alexander was the best Xflow head I used on an A > series engine" in spite of him apparently having experience with the Arden > head. > > Why he was able to get that head to perform better than the Arden head I > can't tell you, but just from looking at the photo's I would expect that > it's advantage over a 5 port was probably mainly due to it's large valves > and chamber shapes. The port layout itself doesn't appear to over any major > advantage at all. > > It's also interesting to note the reference to the "Mowog" crossflow head, > as these things seem to be a bit of a mystery. > > From what I've been able to gather, both from my own sources and those > floating around the internet, there is some doubt as to whether BMC ever > made any of their own crossflow head castings, and if they did any detail > about them is particularly scant. I read a comment once some time ago from a > retired BMC engineer who had a 45 year professional association with Mini's > at the factory and he claimed that BMC did indeed make such a head, but they > only ever made three experimental castings which proved unsuccessful and > didn't see the light of day. He also never mentioned if they were cast iron > or alloy. > > The term "Mowog crossflow" seems to have become a pretty generic description > for any crossflow head that will bolt onto an A series engine, however > *some* early versions of the Arden alloy head actually had the word "MOWOG" > cast into their lower front face in large letters at the gasket line right > under the number two inlet port, with the number "CAHT 346" cast at the same > level under the number four spark plug. "CAHT 346" is the BMC special tuning > part number for the bare Arden head casting. The term "Mowog crossflow" has > been used a great many times in various sources when referring to the Arden > head, and to my mind that suggests that it's more than likely anyone > referring to a "mowog head' is indeed talking about the Arden head as far as > crossflow heads are concerned. > > For some reason known only to him, Ozone is hell bent on proving the > existence of a BMC factory made cast iron Crossflow head that he refers to > as the "Mowog head", and it's existence as an official BMC special tuning > part either did or didn't appear on any official parts catalog depending on > his mood. Such a head doesn't appear in any of the catalogs I have between > 1967 and 1972, but then I don't know if I have the full set and there *may* > have been a list printed on April 1st 1968 that showed such a head as being > available and was only current for two weeks. > > I f such a head actually exists I have no idea as to what it is, and to be > totally honest I don't think he does either. The homologation list he cited > recently as "proof" of the existence of such a head showed nothing other > than a Weslake head with a BMC part number, which mean nothing other than > BMC had allocated a part number to the things for their own use just like > they did with the Arden head. ~~~~~~~~~~~~~~~~~~~~~ simple....just condense all yer wankery into..."i have no idea" > > -- > Regards, > Noddy. > > > > > > -- jonz "Usenet is like a herd of performing elephants with diarrhea - massive, difficult to redirect, awe-inspiring, entertaining, and a source of mind - boggling amounts of excrement when you least expect it." - Gene Spafford,1992
From: John McKenzie on 1 Oct 2009 06:06
> > Back off to England I expect to square things up with his "Mini expert" > mate. Maybe he'll get a chance to take some happy snaps of a few 8 port > configurations over there and come back to pass them off as "his". nah he 'couldn't be bothered' - he 'could' be bothered posting 400 replies in the space of a couple of days to try and weasle out of it, but 'couldn't be bothered' with the 10 second upload of just one pic that would prove his case categorically. that makes perfect sense -- John McKenzie tosspam(a)aol.com abuse(a)yahoo.com abuse(a)hotmail.com abuse(a)earthlink.com abuse(a)aol.com vice.president(a)whitehouse.gov president(a)whitehouse.gov sweep.day(a)accc.gov.au uce(a)ftc.gov admin(a)loopback abuse(a)iprimus.com.au $LOGIN(a)localhost I knew Sanchez before they were dirty root(a)mailloop.com $USER@$HOST $LOGNAME(a)localhost -h1024(a)localhost abuse(a)msn.com abuse(a)federalpolice.gov.au fraudinfo(a)psinet.com abuse(a)asio.gov.au $USER(a)localhost abuse(a)sprint.com abuse(a)fbi.gov abuse(a)cia.gov |