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Old 11-25-2009   #1
jeasen
 
Join Date: Jul 2009
Location: Bonner Springs, Kansas
Posts: 34
Default 1994 Mufflers

I want to upgrade the exhaust on my 1994 ZR1. My first thought was Corsa, but after reading a report on the 1994 exhaust system by Haibeck Automotive it appears that the bottle neck in the 1994 factory exhaust is the mufflers. Only 1 psi difference across the cats, no difference in pressure across the resonator, but 4 psi increase in front of the mufflers. A Corsa system would not do anything for the difference in pressure across the cats, and there is nothing wrong with the resonator. So maybe just a muffler change??

Anyone know of a non restrictive replacement muffler for the 1994 ZR1? It appears the the diameter of the pipes leading to the factory muffler is 2 3/4". The LT1 mufflers are 2 1/2" or 2 1/4" and would be no improvement over the stock ZR1 mufflers.

There is nothing wrong with my exhaust system I just want to add a little more performance.

I guess I could just remove the mufflers and replace them with a straight pipe but I am concerned about the noise that would make?

Anyone have any suggestions or thoughts on this?
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Old 11-25-2009   #2
jonszr1
 
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Default Re: 1994 Mufflers

you might go look on the corvette action center , and see what hib halverson put on for mufflers. i believe they were 3 chamber flowmasters
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Old 11-25-2009   #3
Kb7tif
 
Join Date: May 2009
Location: S Nevada
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Default Re: 1994 Mufflers

Quote:
Originally Posted by jeasen View Post
I want to upgrade the exhaust on my 1994 ZR1. My first thought was Corsa, but after reading a report on the 1994 exhaust system by Haibeck Automotive it appears that the bottle neck in the 1994 factory exhaust is the mufflers. Only 1 psi difference across the cats, no difference in pressure across the resonator, but 4 psi increase in front of the mufflers. A Corsa system would not do anything for the difference in pressure across the cats, and there is nothing wrong with the resonator. So maybe just a muffler change??

Anyone know of a non restrictive replacement muffler for the 1994 ZR1? It appears the the diameter of the pipes leading to the factory muffler is 2 3/4". The LT1 mufflers are 2 1/2" or 2 1/4" and would be no improvement over the stock ZR1 mufflers.

There is nothing wrong with my exhaust system I just want to add a little more performance.

I guess I could just remove the mufflers and replace them with a straight pipe but I am concerned about the noise that would make?

Anyone have any suggestions or thoughts on this?
Headers. You will like them. A bit loud though.
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Old 11-25-2009   #4
secondchance
 
Join Date: Aug 2006
Location: McLean, VA
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Default Re: 1994 Mufflers

I don't know whether it's the muffler design or the pinching of pipe as it connects to the factory muffler.
I personally like the 92 and later factory muffler tips. I think Corvette Central carries Magnaflow mufflers and it looks like it retains factory style tips (a wide black rectangular tip).
Does anyone had experience with Mangaflo?
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Old 11-25-2009   #5
ZZZZZR1
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Default Re: 1994 Mufflers

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Originally Posted by Kb7tif View Post
Headers. You will like them. A bit loud though.
Negative.... That is the sound that an LT5 should sound like!





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Old 11-25-2009   #6
1990 415
 
Join Date: Feb 2009
Location: Canada
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Default Re: 1994 Mufflers

Definitely go with headers and straight pipe. I have this on both of my ZR-1s and it sounds awesome. Straight pipe gives the sound of a serious performance sports car.
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Old 11-25-2009   #7
902066
 
Join Date: Jul 2005
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Default Re: 1994 Mufflers

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Originally Posted by 1990 415 View Post
Definitely go with headers and straight pipe. I have this on both of my ZR-1s and it sounds awesome. Straight pipe gives the sound of a serious performance sports car.
Lets here a sound clipp of one of your cars, for those of us thinking of going this route. Please
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Old 11-25-2009   #8
Jeffvette
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Default Re: 1994 Mufflers

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Lets here a sound clipp of one of your cars, for those of us thinking of going this route. Please

You'll have to show up at BG, he is internet impaired.
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Old 11-25-2009   #9
32valvZ
 
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Join Date: Nov 2007
Location: Sunshine State
Posts: 1,071
Default Re: 1994 Mufflers

Quote:
Originally Posted by jeasen View Post
I want to upgrade the exhaust on my 1994 ZR1. My first thought was Corsa, but after reading a report on the 1994 exhaust system by Haibeck Automotive it appears that the bottle neck in the 1994 factory exhaust is the mufflers. Only 1 psi difference across the cats, no difference in pressure across the resonator, but 4 psi increase in front of the mufflers. A Corsa system would not do anything for the difference in pressure across the cats, and there is nothing wrong with the resonator. So maybe just a muffler change??

Anyone know of a non restrictive replacement muffler for the 1994 ZR1? It appears the the diameter of the pipes leading to the factory muffler is 2 3/4". The LT1 mufflers are 2 1/2" or 2 1/4" and would be no improvement over the stock ZR1 mufflers.

There is nothing wrong with my exhaust system I just want to add a little more performance.

I guess I could just remove the mufflers and replace them with a straight pipe but I am concerned about the noise that would make?

Anyone have any suggestions or thoughts on this?
You will never notice a performance difference by changing mufflers on any car. Sound difference, yes, but not a noticeable SOTP feel. Listen to us and bolt on some headers and then a nice Corsa or B&B cat back system. Youll have performance along with the sound improvment.
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Haibeck Chip
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FIC Injectors
Watson LT Headers
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Bill B Built Transmission
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[FONT=Impact][COLOR=red]1992 [COLOR=black]#[/COLOR] 091[/COLOR][/FONT]
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Old 11-26-2009   #10
1990 415
 
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Default Re: 1994 Mufflers

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Originally Posted by Jeffvette View Post
You'll have to show up at BG, he is internet impaired.
I take that personally - even if it is true

I will have my 415 with straight pipes at BG in May. I'll be glad to give you an earfull. I detest mufflers on a ZR-1.
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