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#1
08-14-2022, 03:43 PM
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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 
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#2
08-14-2022, 06:25 PM
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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.
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| The Following 15 Users Say Thank You to 1967Z28 For This Useful Post: | ||
1967 4K (01-28-2026), big gear head (01-28-2026), dykstra (01-28-2026), jbtech (08-15-2022), John (08-17-2022), John Brown (08-15-2022), juliosz (08-14-2022), jwbavalon (08-14-2022), napa68 (08-15-2022), olredalert (01-27-2026), PeteLeathersac (08-15-2022), RPOLS3 (08-14-2022), Steve Shauger (08-14-2022), X66 714 (09-08-2022), YenkoYS-199Stinger (08-18-2022) | ||
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#3
08-14-2022, 10:25 PM
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Great information posted by Jon and others over at CRG.
http://www.camaros.org/forum/index.php?topic=9900.0
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| The Following 2 Users Say Thank You to TerryD For This Useful Post: | ||
169indy (08-15-2022), PeteLeathersac (08-18-2022) | ||
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#4
08-15-2022, 12:07 AM
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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
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| The Following 2 Users Say Thank You to napa68 For This Useful Post: | ||
1967Z28 (08-15-2022), Too Many Projects (08-15-2022) | ||
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#5
08-18-2022, 12:55 PM
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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
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#6
08-18-2022, 01:04 PM
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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.
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| The Following 7 Users Say Thank You to HuggerSS For This Useful Post: | ||
169indy (08-18-2022), jbtech (08-26-2022), juliosz (09-08-2022), L_e_e (08-26-2022), napa68 (08-18-2022), olredalert (08-18-2022), PeteLeathersac (08-18-2022) | ||
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#7
09-08-2022, 12:03 PM
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PM Sent to HuggerSS.....
Thanks
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#8
01-27-2026, 11:14 PM
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Valve covers
Quote:
__________________
Barry Allan
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#9
01-28-2026, 12:22 AM
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Quote:
https://www.camaros.net/threads/time...1#post-3286841
__________________
68,69&2015 Z/28's 69 L78 Nova Purchased new 32k miles 69 Restored Nova L34 Father/Son Few Corvettes Our 68 Z/28 Build thread- http://www.camaros.net/forums/showthread.php?t=182584
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