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-   -   Cowl Plenum Information (https://www.yenko.net/forum/showthread.php?t=172789)

napa68 08-14-2022 02:43 PM

Cowl Plenum Information
 
I've been curious about the differences in cowl plenum air cleaners and how they may change between body platforms.

For instance, on Doug's 67 Yenko, is there a difference from a small block to a big block? A bodies to fullsize. Etc....

I've been looking around on the web, and cannot say I found a good source of info.

Sorry if this is kind of a remedial question. I'd just like to know more.

In advance, thanks!
Tim

1967Z28 08-14-2022 05:25 PM

2 Attachment(s)
A cowl plenum air cleaner for a small block will have four "windows" in the area that would lead toward the duct. A big block cowl plenum air cleaner will have five of these "windows", and the metal extension with the rubber seal on it will be a little wider and longer. Also, the big block version has a small notched area on the driver's side that provided clearance for a breather cap on the LH valve cover. A notch at the front of the cowl plenum air cleaner is for clearance for the '68 smog pump. The '67 air cleaner does not have a notch up front because the smog pump and hoses have enough room without it.

TerryD 08-14-2022 09:25 PM

Great information posted by Jon and others over at CRG.

http://www.camaros.org/forum/index.php?topic=9900.0

napa68 08-14-2022 11:07 PM

Thank you John and Terry.

I forgot about that thread over on CRG. If there is more guys, don't hold back. It's one if those items I find facilitating from back in the day.

Tim

RamAirBirds 08-18-2022 11:55 AM

I know i am still searching for a "Boot" that connects the 2 pieces...Cant even find a reproduction part. If we could determine a good material out there where one could be made would even be helpful.
This is for a 1968 Z28
ANYTHING out there?
RA

HuggerSS 08-18-2022 12:04 PM

My friend is making the cowl plenum boots. They are right on with the originals. He is even using the correct burlap material to connect the seam. Please send me a message for his contact information.

RamAirBirds 09-08-2022 11:03 AM

PM Sent to HuggerSS.....
Thanks


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