CRG Discussion Forum
Welcome, Guest. Please login or register.
Did you miss your activation email?
October 24, 2014, 03:41:53 AM

Login with username, password and session length
Search:     Advanced search
Welcome to the CRG Discussion Forum!
Forum registration problems: Make sure you enter your email correctly and you check your spam box first. *Then* email KurtS2@gmail for help.
105715 Posts in 12341 Topics by 4754 Members
Latest Member: Jake
* Home Help Search Login Register
+  CRG Discussion Forum
|-+  Camaro Research Group Discussion
| |-+  General Discussion
| | |-+  Chambered Exhaust Option - 69 Z
« previous next »
Pages: 1 [2] 3  All Print
Author Topic: Chambered Exhaust Option - 69 Z  (Read 5529 times)
jmcbeth
Member
***
Posts: 196


1st and 5th Gen Camaros


View Profile
« Reply #15 on: April 02, 2012, 01:23:20 PM »

Here are promised pics of Gardner exhaust with resonators.
Logged

John
1969 Camaro Z/28 RS
Numbers Matching
jmcbeth
Member
***
Posts: 196


1st and 5th Gen Camaros


View Profile
« Reply #16 on: April 02, 2012, 01:24:25 PM »

And a couple more. (Will post link to video once I figure out how to upload to youtube.)
Logged

John
1969 Camaro Z/28 RS
Numbers Matching
jmcbeth
Member
***
Posts: 196


1st and 5th Gen Camaros


View Profile
« Reply #17 on: April 02, 2012, 01:57:03 PM »

And, here's what it sounds like:

http://youtu.be/8PMF8311ACA

Logged

John
1969 Camaro Z/28 RS
Numbers Matching
red69
Member
***
Posts: 104


View Profile Email
« Reply #18 on: April 02, 2012, 07:18:58 PM »

I have a set of resonators which I purchased in 76 from GM with my chambered system I mistakenly believed they went with that system. Having no use for them I welded  a set of header reducers on the inlets and used them a couple of times to test an open header car on the street. I'm pretty sure that the reducers can be cut off without hurting the resonators. If anyone can use them, I'll dig them out and take a look to be sure. Send me a PM or e-mail if you can use them.
Logged
Dave69x33
Member
***
Posts: 346



View Profile Email
« Reply #19 on: April 02, 2012, 08:13:16 PM »

jmbeth,

Thank you for posting the pictures of your exhaust system and YouTube sound clip.  Your car looks and sounds great!  This is the first time I have heard a ’69 Z28 with stock exhaust and resonators.

I just played your YouTube sound clip side-by-side with my system and they are very similar.  Your system with the resonators is a bit quieter than mine without resonators, but not by much.  If we were to run our cars side-by-side, I am sure the tone would be more noticeable.

My idle characteristic is slightly different due to my recent motor rebuild and cam selection.  My car is not a numbers matching Z28, and has a replacement "DZ" engine, so I decided to update the valve train to a full mechanical roller Comp Cams #12-770-8, "XR274R.  The cam's 110 deg lobe separation, lift, and the intake and exhaust duration allow for very nice and usable RPM range of 2200 - 6200.  I am very happy with the power this cam provides and it is very drivable.  My goal was to retain the stock mechanical lifter sound, and keep the stock valve covers, so the engine look and sounds very stock. 

Again...great job with your car!

Dave
Logged
jmcbeth
Member
***
Posts: 196


1st and 5th Gen Camaros


View Profile
« Reply #20 on: April 02, 2012, 09:53:55 PM »

Dave,

Thanks. How about posting a link to your sound clip? I'll bet the idle sounds very different with oyur cam. Mine is all correct factory components and hence the "smooth" sound.

Best,

John
Logged

John
1969 Camaro Z/28 RS
Numbers Matching
Dave69x33
Member
***
Posts: 346



View Profile Email
« Reply #21 on: April 03, 2012, 11:07:53 AM »

jmcbeth,

I had planned to do that, and I will try to get this done this weekend or very soon.  I have several sound clips but I did them solo and you see me walk from behind the camera to start and idle the car, pull into the garage, shut off the engine and then walk back to the camera to shut it off.  I am not able to edit the sound clip and I need to get an assistant to help as you did.

Prior to rebuilding my engine, I searched and searched but could not find a sound clip of a Camaro Z28 302 with this cam.  Your "stock" set-up and my "modified - stock" set-up will provide a unique side-by-side comparison!

Regards,

Dave 
Logged
mickeystoys69RSSS
Member
***
Posts: 242



View Profile
« Reply #22 on: April 03, 2012, 05:10:53 PM »

Quick question about the chambered exhausts. Do they have part numbers stamped on them anywhere including the ones for the big blocks. Mine has a chambered exhause system installed and the build date is 11C so it is before the change. I am just trying to document my car as much as possible thanks.
Logged
69Z28-RS
Hero Member
*****
Posts: 2460


owner since '76


View Profile Email
« Reply #23 on: April 03, 2012, 10:02:09 PM »

The chambered pipes I purchased have the standard GM 'paper labels' wrapped around the pipes (with Part numbers).. the PN's are not stamped into the pipes (to my knowledge)..

Gary
Logged

Gary W.  /  69Z28-RS, 72 B 720 cowl console rosewood all tint
69 Corvette convertible, silver/black 350 hp,
60 Corvette white/red, 72 Corvette coupe (2), 
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55 Nomad, '57 Nomad, '57 B/A Sedan
mickeystoys69RSSS
Member
***
Posts: 242



View Profile
« Reply #24 on: April 04, 2012, 09:51:41 AM »

Mine are installed in the car so there are no paper wrappers. Thanks.
Logged
Dave69x33
Member
***
Posts: 346



View Profile Email
« Reply #25 on: April 24, 2012, 07:25:12 PM »

jmcbeth,

I finally was able to take and edit a sound bite of my '69 Z28 with stock exhaust w/o resonators.  My 302 is "relatively" stock but as I mentioned earlier in this discuss thread, I decided to upgrade the valve train to a full roller cam and roller rockers from Comp Cams as I had specified. 

I just posted the sound bite on You Tube: http://youtu.be/bSGjLtTmmls

I'll submit another post on CRG titled "Stock 1969 Z28 Sound Bites" with links to both our sound bite so it will be easier to find in the future.  If some else has Gardner Exhaust’s chambered system on a stock '69 Z28, please post a similar sound bite.  This will provide an interesting side-by-side comparison with jmcbeth's stock transverse muffler system with resonators.

Thanks!

Dave
Logged
jmcbeth
Member
***
Posts: 196


1st and 5th Gen Camaros


View Profile
« Reply #26 on: April 24, 2012, 08:33:01 PM »

Dave,

Very, very nice sound. I love the cam! I think it sounds very different from the std cam and resonators. It would be great to have these sound bites in one place so everyone can listen to the difference.

Best,

John
Logged

John
1969 Camaro Z/28 RS
Numbers Matching
oldcat
Newbie
*
Posts: 3


View Profile Email
« Reply #27 on: December 19, 2012, 08:39:00 PM »

My 1969 Z that I purchased new in Tionesta PA , had chambered exhaust. Yes several times the state police questioned them and issued tickets , but told me that they would check with the Chevy dealer and if they were stock they would withdraw the tickets. They did and that was the end of it. I never went to a LICKem and STICKem inspection station, the chambers and headers always passed. The only other exhaust noise problem arose when I removed the rear over the axle part of the exhaust and directed the pipes to the side. It was OMG loud and I was busted, I had to put them back on.
Logged
firstgenaddict
Hero Member
*****
Posts: 1252



View Profile WWW
« Reply #28 on: December 21, 2012, 10:01:16 AM »

Here is a link to a Gardner Chambered system on the car I am finishing up right now.
10D (Early) 1969 Z28, std bore, NOS cam, honed for new rings and crank polished new bearings.

Only change is using JOHNZ's distributor and carb settings.
Idling at 900 RPMs.

http://www.youtube.com/watch?NR=1&v=-wX9IZQiVh8&feature=endscreen
Logged

James
Collectin' Camaro's since "Only Rednecks drove them"
 
Check out the Black 69 RS/Z28 45k mile Survivor and the Lemans Blue 69 Z 10D frame off...
https://picasaweb.google.com/112392262205377424364/1969_Z28_Restoration
restore-z28
Member
***
Posts: 270



View Profile Email
« Reply #29 on: December 21, 2012, 10:59:25 AM »

Great videos Dave and James, gotta love the sound of Chambered exhaust. James it looks like the car is almost complete, you need to update your TC thread with some pics.
Logged

Sonny

1969 Z28 Camaro
1970 Z28 Camaro

www.bccamaroclub.com
Pages: 1 [2] 3  All Print 
« previous next »
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.19 | SMF © 2013, Simple Machines Valid XHTML 1.0! Valid CSS!
Page created in 0.074 seconds with 18 queries.