Chambered Exhaust vs. Standard Exhaust

[Michael B.]

[Gary S.]

Re: Chambered Exhaust vs. Standard Exhaust

A friend of mine has them on his 77 and it has a nice throaty sound, not excessively loud and definetly louder than stock. I will say I REALLY like the sound. If you get into the throttle a bit, it is even deeper sounding. We were under his car two days ago, and I will tell you that the crimps (or whatever they call them) in the pipes are substantial. I believe the folks that say that this exhaust is restrictive. On the other hand, do you use all of the power available from your engine?
Gary

[Tom Freeman]

Re: Chambered Exhaust vs. Standard Exhaust

Contact Allan's Exhaust and talk to them about the systems they offer. http://www.allencorvetteexhaustsystems.com

Their phone is (574) 722-7272. When I talked to them about them they were very positive about them NOT being more restrictive.

tom...


The '73 Spot

[William C.]

Re: Chambered Exhaust vs. Standard Exhaust

Only advice I can give is from folks I went to school with in '65-67 who worked at the Chevy Tech Center. They likened the use of sidepipes to "putting a cork in the exhaust" as compared to the off-road undercar system. I have no comment I can make on current replacement systems.

[Wayne K.]

Re: Chambered Exhaust vs. Standard Exhaust

I have a 67 L79 that had under body stock exhaust and one of the first things I did was add the factory sides. I did it for the sound and can't really say it made a performance difference by the seat of the pants feel. I have a roadster and I will say that for long drives with the top up running at 70-75 (3:70 rear) the sound gets to be a little much and you can forget about a radio. If I had a coupe I would probably go for the under body chambered and then maybe that might be a little much at higher speeds. Just my .02.

[Mike McKown]

Re: Chambered Exhaust vs. Standard Exhaust

I've had chambered exhaust on two different vehicles. A stone stock original '69 Z-28 Camaro and a '65 327/250 Corvette. Both cars used the GM exhaust system. Both of them, I changed over from mufflers. I can't say as I noticed any difference in performance. The 1/4 mile trap speed on the Z car was around 100 mph with either way. The 250 hp car was too slow too time with either system.

I have no experience with aftermarket chambered exhaust. Why don't you contact your vendor and ask him if there is any restriction?

You know, Chevrolet only offered this on their performance engines in a time when they used the 2 1/2 inch muffler systems to get flow rate. So you have to ask yourself, why would they offer them only on performance engines if they were restrictive?

Mike

[Michael B.]

Re: Chambered Exhaust vs. Standard Exhaust

Mike, Who's system did you use or did you just use the chambered muffler and re-work the rest of your system?

Mike

[Mike McKown]

Re: Chambered Exhaust vs. Standard Exhaust

As I stated, the systems were of GM manufacture. I am not familiar with aftermarket systems.

Mike

[Patrick H.]

Re: Chambered Exhaust vs. Standard Exhaust

Mike,

Chambered exhaust, from GM, for a Corvette? I've never know GM to make such an item, especially as it was not used in production. They used the "off road" exhaust which used different mufflers, but as a chambered system was not used Corvettes originally, I'd be surprised if GM ever offered one in the parts system. I have believed that the chambered system is a relatively new aftermarket exhaust for the Corvette.

The chambered system was, of course, used on the Camaro by GM.

Patrick

[Mark Ring]

Re: Chambered Exhaust vs. Standard Exhaust

I have a Camaro with the chambered exhaust. I like the sound personaly but it is not of GM manufacture. It is a replica of the GM system marketed by Rick's. The chambered systems were offered by GM on Chevelles and Camaros for a few months during 69 production but were removed from production during the year due to noise/ticket complaints. I have heard the dealer would remove them from the car if it came in for any sevice work. Can't confirm that though. John Hinckley has reported a GM documented power loss with the chambered pipes but as was said earlier, I doubt I use all the power that is there anyway.

Not TOO loud at all IMHO but my wife knows when I come around the corner on my way home. I believe it is closer to authentic than the deep tone duals that were installed on later build cars as mine was quite early production. FWIW

-Mark.

[Mike McKown]

Re: Chambered Exhaust vs. Standard Exhaust

Patrick:

If I am using the wrong nomenclature for the factory sidepipe design, please enlighten me and others.

Mike

[Mike McKown]

Re: Chambered Exhaust vs. Standard Exhaust

When the cops got hot on it around here, the local Chevy dealer replaced a number of these sets at Chevrolet's expense. I don't know what policy was. Just that it didn't cost the customer.

[Duke W.]

Re: Chambered Exhaust vs. Standard Exhaust

The Corvette's option side exhaust is a "chambered" design, but is usually
refered to as "side exhaust" or "side pipes". There are currently
aftermarket under the car "chambered exhaust" availalbe for the Corvette, so
when on refers to "chambered exhaust" on a Corvette they are normally
referring to the aftermarket under the car chambered system.

Duke

[Patrick H.]

Re: Chambered Exhaust vs. Standard Exhaust

Mike,

While chambered in design, the Corvette side pipes are usually referred to as just that - side pipes. The Camaro option (which is under the car) is called chambered, as are the under-the-car chambered systems sold by the Corvette aftermarket. Thus, in the Corvette world at present, the two are differentiated in this manner.

I guess a correct way to describe your cars would be to say that you've had original GM Camaro chambered exhaust as well as original GM Corvette side pipes.

Patrick

[Mike McKown]

Re: Chambered Exhaust vs. Standard Exhaust

Patrick:

Thank you for the lesson in semantics. As I stated in my post, I am unfamiliar with aftermarket systems.

Your description of the pipes is okay. Use it if you like. I like mine better. Been using this term for years and never been chanllenged until today.

If you had been on the streets in this part of the country in '65, you would have heard the terms "chambered" and "side pipes" talking about the same car. You know, it's like in some parts of the country, they say "doity doid" and around here they say "thirty third".

By the way, did you ever get your car started?

Mike