Can someone please explain....
Thread Starter
Racer
Joined: Dec 2000
Posts: 296
Likes: 187
From: North Olmsted Oh
Can someone please explain....
Let me start by saying I just finished installing Mid Americas Chambered exhaust pipes. Very nice set up. Bolted right up, no problems. And do they ever sound NICE :D
Anyhow, on more than one occasion I've seen people say, can't remember exactly who, that the chambered exhaust pipes are actually more restrictive than the standard dual 2.5 inch exhaust with mufflers. Looking at the pipes, I can't figure out any reason why that would be true.
Can someone please enlighten me (and maybe someone else)??
Thanks
Bill.
[Modified by vette68, 9:43 PM 10/18/2001]
Anyhow, on more than one occasion I've seen people say, can't remember exactly who, that the chambered exhaust pipes are actually more restrictive than the standard dual 2.5 inch exhaust with mufflers. Looking at the pipes, I can't figure out any reason why that would be true.
Can someone please enlighten me (and maybe someone else)??
Thanks
Bill.
[Modified by vette68, 9:43 PM 10/18/2001]
Senior Member since 1492
Joined: Aug 2000
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From: Just because I'm paranoid doesn't mean people aren't out to get me...
St. Jude Donor '09
Re: Can someone please explain.... (vette68)
Ya got me too! I can't understand it. Growing up during the hey days of the muscle car 60's, everyone would remove their mufflers to get better air flow. The thinking being that the mufflers impeded air flow(and they did). Now some folks say that adding "certain" mufflers will actually increase flow and HP! :confused:
My chambered system is 2.5 inches straight thru the "chambered" section and it flows 100 times better than the rusted out header, 2 inch muffler system it replaced. I couldn't believe the difference in throttle response after I hooked up the chambered system. It was like a different car!
There may indeed be a "mufflered-header" combo out there that will flow better but I'm doing it my way. I've waited a LOOOONNNNGGG time to legally run a car with essentially straight pipes and I'll be hard pressed to switch:D
Next step might be the Hooker side pipes
My chambered system is 2.5 inches straight thru the "chambered" section and it flows 100 times better than the rusted out header, 2 inch muffler system it replaced. I couldn't believe the difference in throttle response after I hooked up the chambered system. It was like a different car!
There may indeed be a "mufflered-header" combo out there that will flow better but I'm doing it my way. I've waited a LOOOONNNNGGG time to legally run a car with essentially straight pipes and I'll be hard pressed to switch:D
Next step might be the Hooker side pipes
Melting Slicks
Joined: Jul 1999
Posts: 3,201
Likes: 0
From: Clifton Park NY
Re: Can someone please explain.... (Rapalord)
From what I've heard here on the forum, the problem is that (1) the inner diameter of the pipes at the points they are "dented" is about 2", and (2) this restriction is too close to the engine, where the exhaust gas is still hot, and therefore occupies a larger volume. Or that's what I understood... :conehead
-Pedro
-Pedro
Race Director
Joined: Apr 1999
Posts: 15,145
Likes: 477
From: NM
Re: Can someone please explain.... (vette68)
The theory is that where the pipe is pinched down it will restrict the flow. I can see this being true and would cause a reduction in power over a stright 2 1/2" pipe, but do not see how it could cause more restriction then any muffler would.
tom...
tom...
Race Director
Joined: Apr 1999
Posts: 11,520
Likes: 13
From: CORVETTE 77 385 C.I. TEXAS
Re: Can someone please explain.... (Pedro'74)
For performance you want a low restriction muffler at the end of the exhaust.
My first car a Chevy Hot Rod I built had the glasspack mufflers toward the front. I increased power & during an acceleration run it blew the mufflers off & took off like a blower had kicked in ! I then suspended the mufflers ft. & rr. so that a hard jab on the gas would blow off. Best done after staging ! Too late to back out now- got ya ! :cool:
Run low restriction mufflers & put them at the end of the exhaust so the effective restriction is even less.
My first car a Chevy Hot Rod I built had the glasspack mufflers toward the front. I increased power & during an acceleration run it blew the mufflers off & took off like a blower had kicked in ! I then suspended the mufflers ft. & rr. so that a hard jab on the gas would blow off. Best done after staging ! Too late to back out now- got ya ! :cool:
Run low restriction mufflers & put them at the end of the exhaust so the effective restriction is even less.
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Verdad Gallardo
Safety Car
Joined: Aug 2000
Posts: 3,711
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From: San Antonio TX
Re: Can someone please explain.... (Ganey)
A chambered exhaust is more restrictive when compared to a current high-flow muffler, like Flowmasters and others. Back when they came out on certain muscle cars like Z/28s back in the 60s, they were a substantial improvement over traditional mufflers. In fact, you don't have to look too far back to when a real Corvair Turbo muffler was the muffler of choice.
Now, as to whether the flow capacity of a 2.5" chambered system with a proveable flow restriction compared to a 2.5" system with a Flowmasters muffler makes a difference in the real world for you combination is another question. Unless you're making a lot of horsepressure, you're not likely to realize the impact of the restriction.
Now, as to whether the flow capacity of a 2.5" chambered system with a proveable flow restriction compared to a 2.5" system with a Flowmasters muffler makes a difference in the real world for you combination is another question. Unless you're making a lot of horsepressure, you're not likely to realize the impact of the restriction.
Senior Member since 1492
Joined: Aug 2000
Posts: 87,927
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From: Just because I'm paranoid doesn't mean people aren't out to get me...
St. Jude Donor '09
Re: Can someone please explain.... (gerry72)
Now, as to whether the flow capacity of a 2.5" chambered system with a proveable flow restriction compared to a 2.5" system with a Flowmasters muffler makes a difference in the real world for you combination is another question. Unless you're making a lot of horsepressure, you're not likely to realize the impact of the restriction.
I might be loosing some memory cells and it's been a while since I put my chambered system together, but I thought I measured the inside diameter of the chambered system and it measured 2.5 inches. The chambered pipe portion actually expands to three inches thru the length of the chambered area. Or Am I wrong? :confused: :confused: