Author Topic: Cowl plenum air cleaner, cold air induction, etc  (Read 13895 times)

1968RSZ28

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Re: Cowl plenum air cleaner, cold air induction, etc
« Reply #30 on: September 04, 2013, 07:35:28 PM »
If someone is needing a cowl plenum air cleaner for their Trans-Am Camaro or street car, there's one for sale on ebay right now with a buy-it-now of $3,000.

http://www.ebay.com/itm/1967-1968-Z28-Camaro-Trans-Am-Cowl-Plenum-Air-Cleaner-SCCA-Smokey-Yunick-/121168600120

Sold 9-4-13.

Paul

Jon Mello

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Re: Cowl plenum air cleaner, cold air induction, etc
« Reply #31 on: September 05, 2013, 12:18:47 AM »
Looks like a best offer was accepted, not even the full $3,000.
Jon Mello
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70L34

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Re: Cowl plenum air cleaner, cold air induction, etc
« Reply #32 on: September 08, 2013, 02:23:48 AM »
Is the chrome lid correct? My repop has a black lid which I thought was correct.

Jon Mello

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Re: Cowl plenum air cleaner, cold air induction, etc
« Reply #33 on: September 08, 2013, 04:22:53 AM »
As supplied by GM, the lid was black. I have seen maybe 4 or 5 where an owner has chosen to chrome plate the lid.
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1968RSZ28

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Re: Cowl plenum air cleaner, cold air induction, etc
« Reply #34 on: February 19, 2016, 11:51:15 PM »
Here's a photo from Heartbeat City's website just to show a different view/angle...


It's a used, GM original for a mere $6500.00  ;)

www.heartbeatcitycamaro.com/store/product/27220/Camaro-Cowl-Plenum-air-cleaner-GM-1967-1968/

Paul

satman

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Re: Cowl plenum air cleaner, cold air induction, etc
« Reply #35 on: February 24, 2016, 02:20:43 AM »
Good stuff ...... The cowl induction setup was a well engineered piece of kit that really preformed well.

AL

TangoBravo

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Re: Cowl plenum air cleaner, cold air induction, etc
« Reply #36 on: February 24, 2016, 03:31:19 PM »
Definitely a neat system. I imagine that the DOT wasn't too keen on them for a backfire thru the carburetor-would go into the passenger compartment thru the vents and light them up! These systems supplied colder air but I think a lot of people missed that they also increased manifold pressure. Did any racers block off all passages to the interior vents and rocker panels to provide even more pressure on the carb(s)??

Jon Mello

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Re: Cowl plenum air cleaner, cold air induction, etc
« Reply #37 on: February 25, 2016, 02:26:30 PM »
Did any racers block off all passages to the interior vents and rocker panels to provide even more pressure on the carb(s)??

I don't have specific knowledge of a car that did that but I would think that it did happen.
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Starr

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Re: Cowl plenum air cleaner, cold air induction, etc
« Reply #38 on: March 06, 2016, 05:15:02 PM »
Thanks for the pictures and information about those air cleaners, cold air induction. I will have to scratch build one for my Alan Green Camaro's 1/25 scale project.

Cheers,

Guil
Classic Plastic Model Car Club - Lowell, MA

Jon Mello

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Re: Cowl plenum air cleaner, cold air induction, etc
« Reply #39 on: March 07, 2016, 01:36:56 AM »
Definitely a neat system. I imagine that the DOT wasn't too keen on them for a backfire thru the carburetor-would go into the passenger compartment thru the vents and light them up! These systems supplied colder air but I think a lot of people missed that they also increased manifold pressure. Did any racers block off all passages to the interior vents and rocker panels to provide even more pressure on the carb(s)??

Jim Bowman sent me a message to say that his "Monterey High School" Camaro did block off all access to the interior and rocker panels for the cowl plenum air duct. Jim's car ran mostly A/Sedan races but was entered in the 1970 Riverside Trans-Am. It didn't make that race due to troubles during practice. Even though Jim'c car ran a '67 grille it was a '68 body. The red outline highlights the aluminum plate covering the area where the interior air duct was attached to the cowl plenum.



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TangoBravo

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Re: Cowl plenum air cleaner, cold air induction, etc
« Reply #40 on: March 07, 2016, 03:32:47 AM »
Interesting, not too surprising blocking the interior vents, but I was really wondering about the ducts down the outboard plenum boxes to the rocker panels. Any pictures available showing how they were blocked?  Seems there would be a nice advantage to closing them off too. Neat pictures!

If anyone else was on to this, I would imagine that Smokey Yunick was right at the forefront-would be nice to have a little look at Vics maybe?

BULLITT65

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Re: Cowl plenum air cleaner, cold air induction, etc
« Reply #41 on: March 07, 2016, 05:43:17 AM »
man the front suspension looks all out of whack on that pic...but maybe thats the way AL and everybody else set them up?
1969 garnet red Z/28 46k mile unrestored X77
Looking for 3192477 (front) spiral shocks 3192851 (rear) please
Looking for an original LOF soft ray windshield
Looking for original Delco side post negative battery cable part # 6297651AV

yenkomark

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Re: Cowl plenum air cleaner, cold air induction, etc
« Reply #42 on: March 07, 2016, 05:22:31 PM »
Looking at Vic's car would not give you an accurate view of Smokey's work, as the car has been rebodied. The original body could not be saved due to acid dipping and later corrosion.

TangoBravo

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Re: Cowl plenum air cleaner, cold air induction, etc
« Reply #43 on: March 07, 2016, 09:30:27 PM »
It's a shame to lose those pieces of history.
The sad truth with race cars is they probably have a half dozen parts that are original to them. The trail of parts left behind must be extensive.