XCC, That is the original Cooper S manifold with a brake booster takeoff but no smog valve port.  I haven't seen one of those in a long time and was afraid they wouldn't surface in this search.  The stamped number is interesting.  Thanks much.

Also, Cheleker sent me an e-mail with a few numbers we haven't seen so far.  I'll get his stuff in the mix shortly, but wanted to recognize his contribution.  He also seems to be slightly ahead of me for the number of duplicates of a manifold that nobody is ever going to want!

How about an AEG179 - stamped into it and a "P" below cast into it. Tapped for one fitting, no fitting rings but a place for them, 6" on center w/ 1 1/2" openings.

Randy,

Photos sent. Carbs and linkage are attached. The only marks are on the bottom.

meb

Sunday Morning Post - Part 3 of 3

I forgot to mention in post 2 that the MG 1100 manifolds have a slight taper cut on the carb side of the throat.  It's only 1 1/4 inch at the carb mounting face, not 1 1/2 inch like the Cooper manifolds.  It's really just to clean up the opening, not a performane mod.

Now for one that's just so damn cute - an adjective I hate, but you could almost make this one into a piece of bling.  It's off a Turner (a Sprite based sports car) with a 948 engine and is made for H1 carbs, the 1 1/8 inch size from the first Bugeyes.  I have an H1 Bugeye manifold somewhere, and the Turner manifold is much shorter.  It will fit on a Mini and I've been saving it for that 60's era street racer 850 I'll build "someday".  This one apparently uses divine intervention to keep it positioned on the head, neither stud nor ring mounts.  I don't know who cast it but it looked very original on the Turner (the owner swapped it for a Sprite HS2 manifold), so I just call it a Turner.

Finally are a pair of Sprinzell stub manifolds for H4 carbs.  The balance tube is a rubber hose.  Sprinzell Sprites were very fast numbers in their day and I'm assuming the S1000 number means they are for a Sprite 948.  They won't fit on a Mini.  I got these off the "Flounder", a Mini-based rear engined car, in a swap for a standard Sprite setup.

That's all for now.

Sunday Morning Post - Part 2 of 3

Now for posers and red herrings.  Start with three variations of the MG 1100 HS2 manifold.  The earliest ones have no vacuum ports and stud mount, laters have have ports and ring mounts.  One of the vacuum ports is angled.  Each of these three have different numbers cast/stamped.  I'll put the numbers on the chart.

These really aren't all that bad if you are using HS2s, the balance tube opening is much less intrusive and probably disrupts airflow less than the Cooper manfolds.  The heat shields were either one piece or two piece.

Compared to a Cooper manifold the balance tube is smaller diameter and doesn't overhang on the ends.  The 1100 is 1/4 inch longer from face to face and the carbs are mounted on a shallower angle.

Carb spacing is 1/2 inch narrower on the 1100.  The curve in the manifold isn't really that severe. 

Here's a red herring - an MGB manifold narrowed to fit the A Series port spacing.  A 1960's budget racer mod.  It will fit on a Sprite but not a Mini.  I bought it for the carb set, kept the manifold for the novelty value.

More in post 3.

Sunday Morning Post - Part 1 of 3

Yeah, what is it with intake manifolds that makes them so interesting?  Just a chunk of aluminim with no moving parts, but I can't resist.

Great stuff coming in.  Here's where I can use more detail, followed by some pics spread over several posts.

Good Times (Or Nick), meb, Tulka - Can you provide full pics (i.e., show the whole manifold) of the HS4/HS6 manifolds, there seem to be several variations of casting marks.  I have yet another one that I'll show below.

Good Times - Have you ever seen AEG 490 used as a part number, or is that from the casting number on your manifold?  BMC/BL often (but not always) had the part number one digit off of the casting number.  I've never seen 490 used as the part number.

Tulka - Excellent info. on the Mk. II & III stuff - My manuals only cover Mk. I.  Could you also provide full pictures of your 12A 308 with the ring mounts?

MacDhaibhidh - Your the only one that has chimed in with a 12G2463.  Could you provide the missing info on the chart and maybe some pictures.  Tulka has identified it as a Mk. III S.

I will update and repost the chart next week.

Now for the big pile o' stuff - the pile doesn't include any duplicates.  I already posted 12A 308 individually.  (My wife walked by while I was taking this picture.  She stopped making disparaging remarks decades ago!)

First is AEG 347, possibly the most common.  This one has been mildly polished on the carb side so the factory machining marks aren't real visible on the taper.

Next is "my" C-AEG 489 dual pattern HS4/HS6.  I bought this 10 or 15 years ago from one of the major US vendors.  The only marking on it is 12G2464.  No foundry marks (e.g., MOWOG, VAF, etc.)  The exterior of the casting isn't quite as good as most of the others I have, like an 8 out of 10.  Was somebody doing knockoffs?  This one has been heavily modified, it originally had the locating ring groves on the cylinder head side.  Note that neither of the vacuum port bosses was drilled or tapped - aftermarket?

More on the next post.  These tend to crash when they get too long.

I also have a BA82357  AEG490  manifold for 2 x HS6 S.U,s with 6" centers. This is a 4 stud pattern with 2 drilled & tapped top outlets & the stud for the throttle cable fitting. note this one reads 490 not 489 @ the end.

Sold it this week to Nick for $50 & he has photo,s

From parts list AKD5312 (Mk1&Mk2);

I have a 12G 2463 if you want any info on it. I wish it was the correct one for my 69 Cooper

Speed's Expensive........How Fast can you afford to Go??   

meb, Thanks for the info.  Since you didn't state otherwise, I'm assuming those are the only markings on your manifold.  The physical description matches what's already on the chart, but with different markings.  Looks like there might be several versions of the HS4/HS6 manifold, at least as far as the markings go.

RJM

I have a manifold similliar to the one shown by Tulka. Markings on the bottom are "BA82357 / EG49".  I currently have a pair of HS4s on it but it could also take HS6s. It uses locating rings, and has emission and servo takeoffs. It's 6" on center.

meb   

Tulka, Interesting variation of the 12A-309.  Must be from a 998 since all 997's used the studs for location.  All of mine are from 997's, more common in the US than the 998 Cooper.  I'll revise the list to show that one as either stud or ring mount.

Are there any other markings on the AEG 489?  The markings in your picture appear to be on the bottom of the manifold.  The markings I show on the chart are from an AEG 489 that's mounted on one of my race cars, will take it off this weekend to see if there's anything on the bottom of it.  The engine needs to come out anyway .....

Finally, do you have a reference source for the AEG 572 part number for the Evolution manifold?  Not challenging your input, I've just never seen that number listed anywhere and would like to document it if possible.  As noted on my chart the RAC homologation papers (copy attached) don't list a part number, but the pictured manifold has the rectangular mounting face of the C-AEG 488.

Great input, keep it coming.  I'll see about MM including all this in the Tech Section.

I expect Nick (Min-E-Bitz) will chime in. He's done an extensive list of the Cooper/S manifolds.

When the list gets done (or at least far enough along!), contact Mini Mania and have them add it to the Tech section under Articles & News.

Same as Randys 12A309 manifold,but with ring location.Also AEG489 casting numbers on original competitions manifold.

 The "Evolution" can be AEG572/MK2 Cooper/S

 Tulka

My 12A661P2 1004, you can't really see the 1004, but its there. Crappy camera. I got this from a gentleman in England, it wasn't a Stateside purchase, if that means anything.

Cheers,

Ian

I will have a dig through some of my boxes of tut at the weekend to see what I can find.  I'll send pics in on Monday.  Are we sticking to BMC manifolds or is anyone interested in Non BMC too.  Downton, Speedwell, Mangoletsi etc?

Mark F.

Check Out //mk1-performance-conversions.co.uk loads of info and interesting stuff for the mk1 nut.

All, I have AEG 347 and C-AEG 489 (at the very least) and will be posting pictures of those, so don't worry about searching for examples.  Also have three or four versions of the MG 1100.

Club Man's excellent pics support that that's a 998-only manifold.  It's the center boss that's drilled and tapped for vacuum, the location of the PCV valve.  Were it for an S brake booster it would be the right boss drilled and tapped.

The pictures do raise a question.  I've received descriptions (but no pictures) of this manifold having P2 cast in it, but the pictures show only the P.  Anyone have a P2 casting?

RM