BigAl1

I'm collecting parts for my LS engine build and got a "LS6" manifold - I think? The bottom is flat, but there is a 1.395" hole on top right behind the throttle body mount face. Also, there is a sticker behind the throttle body neck with the number "12561182CA Prototype Part Serial No. 001". There is no cast number anywhere on the plastic. Is this sticker the usual PN on the manifold? Or is this an early proto part?

racinbird

iTrader: (2)

pics!!

Another_User

The part number matches what it should be for an LS6-style. Very peculiar. The CA...I wonder if it was some sort of prototype for some California emmissions requirement... Very interesting. I would like to see some pics as well. Did it come from eBay?

crizain

Well, you may have a LS6 with the egr provision from SLP. Flat bottom and part number mean LS6. The pic shows its for the F-body (it has the throttle cable brackets which the vette intakes do not have).

Another_User

Oooo...pics. Is that a functional EGR hole on top? That does look suspiciously like a prototype for meeting some California emmissions requirement...

racinbird

iTrader: (2)

That really dosent look like a typical GM label, some sort of aftermarket piece

BigAl1

Got it with a pile of other stuff from a guy on here.
Yes, the hole is through into the main air path, but the inside edge into the air path looks hand cut - definately not a cast shape. Inside the EGR? hole are 6 ribs.
The label has a logo that looks like CMA.

technical

This sounds familar. I remember someone else here getting a similar manifold a few weeks back and was unsure about part numbers.

ACW

Back in June 2003, 'Project GatTagO' posted in https://ls1tech.com/forums/generation-iii-internal-engine/81499-numbered-connecting-rods.html :
Sounds like that might be the same kind of set-up that BigAl1's manifold started off in.

ROCNDAV

iTrader: (100)

Wanna trade it for a non EGR LS6 intake? I'm in San Gabriel/Temple CIty area.

David

BigAl1

No thanks. Want to keep the adaptability for registration purposes here in Ontario, Canada. Strange rules for kit cars here!

JGKadell

iTrader: (4)

I think the very early LS6 manifolds still had EGR provisions.

SS LS1

The label looks to be from a company that I have been to in Bristol, Indiana. The name of the company is CMI (CMI-Precision Mold, Inc) and when I was there (12 years ago) they were making OEM aluminum intake manifolds in their foundry for GM cars Ford F150 and the 5.0L Mustang GT. I'm sure a company that big has several plants scattered accross the country and it wouldn't surprise me that they are now producing composite OEM intakes.

The CMI I'm talking about has the exact same logo where the letters C M And I are linked together with the globe type object dotting the letter "I". The colors for their logo is the same also.


Here is some info from a search I did......Looks like that do have several plants but no details about Composite parts, just aluminum castings............


Century On Wheels. The Story of The American Automotive Industry. Pioneer Publications, Inc., 1987

An abstract from the book on the historical growth of CMI International, Inc. powered, in part, by technology and equipment from its subsidiaries. Two machine-building subsidiaries were later merged to form Hayes Lemmerz International - Equipment & Engineering, Inc.

In thirty years CMI has grown to become one of the largest independent aluminum casting component manufacturers in North America. CMI was founded in 1957 by Ray H. Witt, president of the company.

CMI supplied components primarily to the automotive sector and also serviced the commercial highway, railroad, recreational vehicle, mining equipment, agriculture and material handling industries. Seven foundries produced malleable and ductile iron, stainless, alloy steel, and aluminum castings.

Machining was a substantial part of the company´s more than $250 business in 1986. CMI´s expertise in metals and machining created a distinctive marketing advantage and business was expanded to also assemble components at the machining plants and deliver products directly to the customers´ plants.

In 1970 CMI purchased Noren Pattern and Foundry in Fruitport, Michigan. CMI-Noren, Inc., as it is called now, has been expanded from one to four aluminum foundries. CMI-Wabash in Wabash, Indiana has been expanded twice since 1978 to double its original size. Size of CMI-Permanent Mold in Bristol, Indiana was expanded to 110,000 square feet and the plant can be the highest volume U.S. producer of permanent mold aluminum castings.

CMI-South, Inc. facility was built in Marion, Alabama in 1978. Since then the plant capacity was tripled and it became the most automated iron foundry in the South. The original foundry CMI-Cast Parts in Cadillac, Michigan received more than $2 million in new coremaking equipment, mold line, flasks and flask handling equipment, new cupola and metal treatment equipment. One of the most important developments was the ability to pour gray and ductile iron on the same molding line. With the substantial investment CMI foundries are among the most automated in the world, according to Ray Witt.

CMI-Dearnborn machining plant originally located in Dearnborn, Michigan was moved to Montague, Michigan and has tripled in size. A machining shop in Southfield, Michigan has doubled in size after it became CMI-Southfiled, Inc. A second building was purchased in the 1980s for CMI-Southfield Plant 2 and then has tripled in size. A 327,000-square-foot machining plant in Princeton, Kentucky was purchased in 1985. Nearly 80 percent of the company-produced castings are now also machined by CMI.

CMI uses automation to increase productivity at its plants. It designs and builds its own special machines to have more cost effective medium to high volume runs as compared to other conventional methods.

CMI-operated Seaton-SSK with plants in AuGres and Ann Arbor, Michigan builds heavy duty foundry equipment. Recently, all necessary equipment for the new 120,000-square-foot CMI plant in Nuevo Laredo, Mexico was provided by CMI.

Each CMI plant has expertise in statistical process control including specialized computer systems to ensure uncompromised product quality. Continued growths of CMI´s business is the direct result of its commitment to product quality, employee productivity and cost savings.

ACW

SS LS1 - Very interesting!

For reference here is the link it's from: http://www.hayes-lemmerz.com/press_k...es/growth.html

Another_User

Oh, I never even bothered to notice you had that thing in Canada. What are emmisions requirements like up there?

cyphur

iTrader: (10)

ACW you are a searchin ****!!

BigAl1

For kit cars, no smog equipment required to get registered. BUT - if I lived near Toronto area I COULD be stopped and ticketed for not having the proper smog equipment installed. Yet none is required!!! Confusing sometimes! Ontario has the strictest requirements (I believe) in Canada, but nowhere near California requirments (I'm from Fresno 6 years ago).

Project GatTagO

iTrader: (7)

Interesting that someone else has one of these too. Mine actually came on an engine. As posted earlier, the engine has 799 heads castings. From the research that I have done, it looks like we have prototype LS6 manifolds.

Here is a picture of my manifold:



Andrew

BBQLS1

Interesting.

BigAl1

Thanks for the pic Andrew. Now I don't feel so alone! Sort of feel lucky with SN 001. I see your sticker is on the opposite side of the TB zone, and slight damage on the top of the flange? Any other issues you have found with this odd part?