Cowl Induction on a 1966? - Chevelle Tech
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  #1  
Old May 19th, 08, 12:50 AM
Northwest29 Northwest29 is offline
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Question Cowl Induction on a 1966?

Greetings all!

Over the weekend I was watching the Mecum auto auction and they showed a 1966 SS396 with cowl induction. The announcer went over it so quickly that I missed if he said that it was a 'factory' option, or after market. I had a 66 and never heard of this one. As far as I know 1970 was the first year of factory cowl induction for the Chevelles.

Can someone help me out here with the correct information?

Thanks in advance for your assistance.
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  #2  
Old May 19th, 08, 12:55 AM
cachevelle66 cachevelle66 is offline
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Default Re: Cowl Induction on a 1966?

Cowl induction hood on anything earlier that a 70 Chevelle is aftermarket, most of the aftermarket cowl hoods are model after the Camaro dtyle, there was a air cleaner that was ducted to the cowl, it picked air though the cowl grille, upper/firewall cowl was cut for the duct.
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  #3  
Old May 19th, 08, 1:29 AM
Northwest29 Northwest29 is offline
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Default Re: Cowl Induction on a 1966?

Thanks cachevelle66 -

That's exactly what I saw, the air intake was from the pass side firewall and routed to the air cleaner - no special hood involved. I would assume you'd have to cut a hole in the firewall to make this guy work, an interesting mod for sure.
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  #4  
Old May 19th, 08, 3:15 AM
novaderrik novaderrik is offline
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Default Re: Cowl Induction on a 1966?

i don't think the plenum cowl induction setup was a factory installed option- but maybe it was available over the counter.
i do know, however, that an original piece is worth enough to put a decent down payment on a house around here, and repros cost way over $1000.
i also know that they just look badass, and GM engineers (along with people like Smokey Yunick) thought it was worth their time to develop and use it in NASCAR in the early 60's.
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  #5  
Old May 19th, 08, 4:48 AM
rianbechtold rianbechtold is offline
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Default Re: Cowl Induction on a 1966?

That style cowl induction was a rare option for the early z28 camaros (may have only been the 67 year, I'm not sure). I have heard of people putting them on the early body chevelles but do not think/know that it was an option.

Does it work, well let's look at two pictures:

NASCAR engine bay in 1964:



NASCAR engine bay in 2007:


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  #6  
Old May 19th, 08, 10:01 AM
David Bates David Bates is offline
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Default Re: Cowl Induction on a 1966?

Quote:
Originally Posted by rianbechtold View Post
That style cowl induction was a rare option for the early z28 camaros (may have only been the 67 year, I'm not sure). I have heard of people putting them on the early body chevelles but do not think/know that it was an option.
Not necessarily a RARE option. I've seen many full size BB equipped Chevy's with the cowl plenum air cleaner the most recent of which was a 1969 L72 4-Speed wagon at the Adirondack Nationals in Lake George NY.
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  #7  
Old May 19th, 08, 10:09 AM
Keith Tedford Keith Tedford is offline
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Default Re: Cowl Induction on a 1966?

This is what you are talking about? I think the repros are the other side of $2K if I'm not mistaken. It has been pointed out that the plastic piece that attaches to the cowl is not the same for Chevelle and Camaro. It is an attention getter if that's what you are after.
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  #8  
Old May 19th, 08, 11:24 AM
66 MYSTERY CHEVELLE 66 MYSTERY CHEVELLE is offline
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Default Re: Cowl Induction on a 1966?

I have spoken to this subject matter many many times.. 66 Cowl Plenum Air Cleaners that is.. A SEARCH of this here at Team Chevelle will no doubt yield much info. worth the effort to search.

Over the counter High Performance item that was available for 66 SS and 67 SS and many other years and models of Chevelles and Camaros and Impalas... a Smokey Yunik concept...

Doubtful in my opinion that the Chateau Slate 66 SS from Oregon that went unsold at Mecum and BJ a couple years ago.. had a CP on it from day one... just my opinion.

That car is a 360 hp car and not that getting one was limited to the L-78 ( 375hp ) cars, but anyone that was looking to have this option back in 1966/1967 was likely racing and if they were, there were likely using an L-78 in 1966.. just my feeling.. still has a WOW factor!! Repros are very good.. about $2000 now... NOS.. about $5K

Not Factory installed.. cutting hole in firewall was not something the GM guys would have liked and still keep your warranty

Again, do a search.. worth it!

Mike Crown
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  #9  
Old May 19th, 08, 12:18 PM
DZAUTO DZAUTO is offline
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Default Re: Cowl Induction on a 1966?

Ron,
I think the answer to your question has been pretty well covered. And just to repeat, the correct term for pre-70 fresh air intake air cleaners is Cowl Plenum air cleaners (2yrs ago Chuck Hanson brought a 69 to CB07 with a CP air cleaner, supurb car!!!). The reason is because the air actually comes in from the vent area of the cowl just in front of and below the windshield. At one time, these air cleaners were available from Chev Parts Dept.
Factory installed??? That's always been debatable. But for sure, it was a part that you could buy from Chev. And for sure, the first time that it was available (and it WAS installed at the factory) as a genuine, installed part, was on the 1963 RPO Z11. The Z11 was the complete pkg (ONLY came one way) with a 427 (essentially a stroked 409), alum front sheet metal, bumpers, etc, 4sp, posi, no radio, heater and in a plain 2dr Impala ONLY (NON-SS) with dog dish hub caps.
The Z11 Impala actually arrived at the dealer with the Cowl Plenum air cleaner installed. It is also debatable as to how many of these Z11s were assembly line built (components were available from the parts dept). The numbers range between 47 and 57 cars actually built at the assembly plant. We may never know for sure the exact quantity.
There MAY be about 10-12 DOCUMENTED Z11s in existance today. One was recently discovered, bought and is presently undergoing restoration now.
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Last edited by DZAUTO; May 19th, 08 at 4:17 PM.
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  #10  
Old May 19th, 08, 3:00 PM
Northwest29 Northwest29 is offline
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Default Re: Cowl Induction on a 1966?

Quote:
Originally Posted by Keith Tedford View Post
This is what you are talking about? I think the repros are the other side of $2K if I'm not mistaken. It has been pointed out that the plastic piece that attaches to the cowl is not the same for Chevelle and Camaro. It is an attention getter if that's what you are after.

Hi Keith -

Thanks for the photo and inforamtion. That's the exact one that was shown on the Mecum auction. I wonder if it would be that much of a performance boost. But it does look cool.
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1968 SS/RS Camaro SB
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  #11  
Old May 19th, 08, 3:09 PM
Northwest29 Northwest29 is offline
Ron
 
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Default Re: Cowl Induction on a 1966?

Quote:
Originally Posted by 66 MYSTERY CHEVELLE View Post
I have spoken to this subject matter many many times.. 66 Cowl Plenum Air Cleaners that is.. A SEARCH of this here at Team Chevelle will no doubt yield much info. worth the effort to search.

Over the counter High Performance item that was available for 66 SS and 67 SS and many other years and models of Chevelles and Camaros and Impalas... a Smokey Yunik concept...

Doubtful in my opinion that the Chateau Slate 66 SS from Oregon that went unsold at Mecum and BJ a couple years ago.. had a CP on it from day one... just my opinion.

That car is a 360 hp car and not that getting one was limited to the L-78 ( 375hp ) cars, but anyone that was looking to have this option back in 1966/1967 was likely racing and if they were, there were likely using an L-78 in 1966.. just my feeling.. still has a WOW factor!! Repros are very good.. about $2000 now... NOS.. about $5K

Not Factory installed.. cutting hole in firewall was not something the GM guys would have liked and still keep your warranty

Again, do a search.. worth it!

Mike Crown

Thanks Mike, I'll do a search and see what comes up. Holy cow, $2K!!! Now that's what I call a REAL profit margin.
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1968 SS/RS Camaro SB
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  #12  
Old May 19th, 08, 3:12 PM
Northwest29 Northwest29 is offline
Ron
 
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Default Re: Cowl Induction on a 1966?

Quote:
Originally Posted by DZAUTO View Post
Ron,
I think the answer to your question has been pretty well covered. And just to repeat, the correct term for pre-70 fresh air intake air cleaners is Cowl Plenum air cleaners (2yrs ago Chuck Hanson brought a 69 to CB07 with a CP air cleaner, suburb car!!!). The reason is because the air actually comes in from the vent area of the cowl just in front of and below the windshield. At one time, these air cleaners were available from Chev Parts Dept.
Factory installed??? That's always been debatable. But for sure, it was a part that you could buy from Chev. And for sure, the first time that it was available (and it WAS installed at the factory) as a genuine, installed part, was on the 1963 RPO Z11. The Z11 was the complete pkg (ONLY came one way) with a 427 (essentially a stroked 409), alum front sheet metal, bumpers, etc, 4sp, posi, no radio, heater and in a plain 2dr Impala ONLY (NON-SS) with dog dish hub caps.
The Z11 Impala actually arrived at the dealer with the Cowl Plenum air cleaner installed. It is also debatable as to how many of these Z11s were assembly line built (components were available from the parts dept). The numbers range between 47 and 57 cars actually built at the assembly plant. We may never know for sure the exact quantity.
There MAY be about 10-12 DOCUMENTED Z11s in existance today. One was recently discovered, bought and is presently undergoing restoration now.
Tom, I appreciate all the details. I sure never new all of that previously. Education is a wonderful thing. The correct term will help keep it straight and differentiated from the "Cowl" induction.


A Chevy fan in Mustang? Is that anything like a misnomer? (-:
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1966 Chevelle SS396
1968 SS/RS Camaro SB
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  #13  
Old May 19th, 08, 4:14 PM
DZAUTO DZAUTO is offline
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Default Re: Cowl Induction on a 1966?

Quote:
Originally Posted by Northwest29 View Post

A Chevy fan in Mustang? Is that anything like a misnomer? (-:
Now do I seem like the kind of guy who would make fun of you if you got caught red handed with your pants down?

You're right, I would!!!!

(they've even had the Nat'l Mustang meet here in the past, acutally, it was quite impressive to see some of the ULTRA rare, early hi-po Mustangs)
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  #14  
Old May 19th, 08, 4:42 PM
DaleM DaleM is offline
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Default Re: Cowl Induction on a 1966?

There was not a factory RPO code for the system, at least not reported by GM in their Accumulative Production/Final Model Year Reports for 1966 or 1967. It could have been listed as an 'Accessory' item along with such things as the litter containers, portable spot lights, etc. and installed at the dealership.
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  #15  
Old May 19th, 08, 5:57 PM
Keith Tedford Keith Tedford is offline
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Default Re: Cowl Induction on a 1966?

Does anyone know who reproduces the cowl plenum air cleaner setup?
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