CRG Discussion Forum
Camaro Research Group Discussion => General Discussion => Topic started by: 69z28fan on August 21, 2020, 02:43:21 AM
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Can anyone recommend where to get chambered exhaust for a 1969? Doesn’t need to be show quality but don’t want to buy junk either
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https://www.gardnerexhaust.com/
Good stuff.
Have it on a 68z and just got in a set for the 69z
best
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Allen's Exhaust (Indiana) also sells (or did) an aluminized chambered exhaust system for camaros and other cars...
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Gardener is the closest to the original, but pricey. D&R makes a nice version that is much more affordable, worth considering.
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https://www.gardnerexhaust.com/
Good stuff.
Have it on a 68z and just got in a set for the 69z
best
X2 on Gardner Exhaust! Eric Gardner is a great guy & their product is the best. I’ve installed about 15 of their systems ( not chambered though) and the fit & finish is second to none.
Personally I hate chambered exhaust, I like the deep tone better. I think John Z has said the chambered system actually lost about 7 hp. FWIW
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It is a lot more than 7 hp. ZL1 dyno test picked up 79 hp with the chambered removed.
http://www.camaros.org/copo.shtml
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It is a lot more than 7 hp. ZL1 dyno test picked up 79 hp with the chambered removed.
http://www.camaros.org/copo.shtml
That would be correct on 'deep breathing' semi-race engines like ZL-1/L88s, Hemis and Boss 429s. Concerning 'regular' performance engines, I can see around the 7-15 HP mark. I do like the chambered exhausts. I often heard the old timers say "It really crackled when you fired it up".
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I like the sound of them myself. Plus they have an exotic vibe to them. I only have had exposure to originals and Gardner. Hard to beat Gardner's quality. Aluminized pipes will sound a little less tinny so that can help you tune in the sound your after.
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Thanks for everyone’s responses. Spoke to Ron today and going with Gardner’s.
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The original chambered system, in reality all of the systems sounded different, they were made from laminated pipe (double wall). The Chevrolet systems, at least the hi perf systems had head pipes, and exhaust pipes prior to the mufflers made of doublewall or laminated pipe. It results in a less tinny or tinging sound the double wall acts as a dampener giving a deeper sound.
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Just installed one from Allens.
It fit, but it was a PITA.
The pipes that go over the axle are supposed to be welded together, Allens wasn't - which caused the majority of the fitment issues (including the right side head pipe was too short by three inches).
It sounds great, but in the end, I should have gone for the system from Gardner.
I'm just a cheap-ass.
Good luck!!!
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I considered Allen’s due to the price difference but decided Gardner’s was the way to go.
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This old thread mentions a horse power decrease with the chambered exhaust system between 7-15 HP, does anyone know if the later style exhaust with resonators vs. the earlier style without resonators have a difference in HP? I am ordering parts for my late August '69 Z which would have had resonators and would like to maximize the engine output since I don't plan on having my car judged for total originality I am wondering which system would maximize the HP output.
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This old thread mentions a horse power decrease with the chambered exhaust system between 7-15 HP, does anyone know if the later style exhaust with resonators vs. the earlier style without resonators have a difference in HP? I am ordering parts for my late August '69 Z which would have had resonators and would like to maximize the engine output since I don't plan on having my car judged for total originality I am wondering which system would maximize the HP output.
I believe Flowmaster (and others) make a nice 'replacement' system. Might be a consideration to check it out.
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This old thread mentions a horse power decrease with the chambered exhaust system between 7-15 HP, does anyone know if the later style exhaust with resonators vs. the earlier style without resonators have a difference in HP? I am ordering parts for my late August '69 Z which would have had resonators and would like to maximize the engine output since I don't plan on having my car judged for total originality I am wondering which system would maximize the HP output.
John Z told me once that the chambered exhaust cost 7 hp over the non-resonator single muffler (dual in dual out) system. I'm sure the resonator is more 'lossy' than without the resonators.
That said, I'm in the same boat as you.. mid Sept '69 car, so my will get the resonators when I get it back together.
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Thanks Guy's! I am a purist , however this one I have had since a my high school Sr. year and always wanted to put the NOS crossram on it which of course takes it out of contention for originality along with the other GM over the counter parts i.e.; transistor ignition, fiberglass hood, headers, etc.. but still want as much originality without sacrificing performance and safety, Then there are those parts that went missing like the oil sending line which I have just seen sell on eBay for $190.00! vs. $14.00 for a repop , that no one would notice unless being concourse judged, hard for me to justify! from a performance standpoint it doesn't sound like the original configuration would make much of a difference to warrant not using the resonators.
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This old thread mentions a horse power decrease with the chambered exhaust system between 7-15 HP, does anyone know if the later style exhaust with resonators vs. the earlier style without resonators have a difference in HP? I am ordering parts for my late August '69 Z which would have had resonators and would like to maximize the engine output since I don't plan on having my car judged for total originality I am wondering which system would maximize the HP output.
John Z told me once that the chambered exhaust cost 7 hp over the non-resonator single muffler (dual in dual out) system. I'm sure the resonator is more 'lossy' than without the resonators.
That said, I'm in the same boat as you.. mid Sept '69 car, so my will get the resonators when I get it back together.
A 7HP loss wont even be noticeable in my opinion.
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The chambered exhaust was discontinued before your car was even ordered. The nice thing about your car, like mine, is they came with chrome tail pipes. Whatever you do, I would leave that feature. Both my cars came without resonators & the sound sweet. I'm a purist & i would put it back to how it left the factory..Joe
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Joe, If one of your cars is close to the production date of my car wouldn't it have come with the resonators and the chrome exhaust tips? I know mine came with the exhaust tips, but replaced my exhaust system with glass packs in the early eighties and cannot remember which exhaust system was on the car and according to the info. here it should have the resonators unless I,m missing something? and do agree that the slight amount of performance isn't worth not keeping it stock. Curt
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Curt. It doesn't appear the big block cars followed that practice of resornators. I still have my original system on the car. I know of a May 375hp car that's the same as mine..Joe
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Regarding chrome exhaust pipes -
The exhaust pipes on Dave Beems 05A L78 conv N643495 were not chrome - the ones on his 05D L78 conv N648797 are chrome - do we know the the exact change over range?
Joe - When did 68 Z28's get resonators? I had an original day two take off 68 Z exhaust system which had resonators, I know the car was BRG so I assume it was built in the 2nd half of production - Jan-July
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The changeover date for chrome tail pipes was May 19.
ZL1 #3 was built with resonators [production N10 system] per the recall.
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James. I didn't realize 1968 Z/28s had resonators. That contradicts what Jerry MacNeish says in his books. He says the 67/68 Z/28 never had resonators, only the ss350 & 325hp 396. I thought that was a 1969 thing. Thanks for the information. Something I will need to consider once I get all the pieces to put it back to factory. Thank you, Joe
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I don't know what to say about ALL 68 Z's not having resonators. The system I had was definitely off a 68 Z - my dad was really good friends with the owner Ossie Delaney, (whom I met many times and would still talk about street racing his 68 Z into the 1980's) who bought the car new in Greenville SC, immediately took it to Nalley Chev in ATL and had the engine gone through heads ported, off road cam installed, rotating assembly balanced, & then everything equalized - blue printed, 4.88's installed, along with 67 vette side pipes - he worked for my grandfather from 66-75 and along side my father 71-75 which is how my dad and then I came about the system.
When I sold my 68 RS SS 396 project in the early 1990's the system was stacked in the car - Tinkerr a member and participant in discussions here - bought the car from me, however he moved in the mean time and cannot find the system.
William - I thought that some of the BB's got the resonators but not 100% - I remembered the photo you posted - one thing about that photo - the pipes coming into the resonators look HUGE.
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There's lots we don't know & may never know....Joe
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Yes, there have been a few original exhaust cars over the years w/o them. They are an exception; there is no mention of that in service docs or the AIM. NF2 is in the '68 AIM, not '69.
Some did, some didn't.
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NF2 was with resonators?
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NF2 was with resonators?
NF2 was without resonators & was the standard feature of 1968 Z/28s. N10 was with resonators & was standard on SS models. I wonder if the Z/28 that system came off of was ordered with the N10 option but I really don't see on the option sheet how to do that...Joe
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I always thought it was odd because I was like why two mufflers? and one directly under the rear seat floor pans, but I understand now they are resonators.
The car was special ordered by Ossie, If not mistaken it was a cowl plenum 4.10 with Hounds tooth car -his father owned the first, at that time only Mercury Marine dealership in Greenville.
Man a BRG 68 RS Z would look wicked with 67 vette side pipes and cragar big and littles gabriel hi jackers in the back.