1994 Mufflers - ZR-1 Net Registry Forums

jeasen · 11-25-2009

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?

jonszr1 · 11-25-2009

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

Kb7tif · 11-25-2009

Quote:

Originally Posted by jeasen

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.

secondchance · 11-25-2009

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?

ZZZZZR1 · 11-25-2009

Quote:

Originally Posted by Kb7tif

Headers. You will like them. A bit loud though.

Negative.... That is the sound that an LT5 should sound like!

David

1990 415 · 11-25-2009

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.

902066 · 11-25-2009

Quote:

Originally Posted by 1990 415

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

11-25-2009

Quote:

Originally Posted by 902066

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.

32valvZ · 11-25-2009

Quote:

Originally Posted by jeasen

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.

1990 415 · 11-26-2009

Quote:

Originally Posted by Jeffvette

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.

11-25-2009	#1
jeasen Join Date: Jul 2009 Location: Bonner Springs, Kansas Posts: 34	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? __________________ 1994 ZR1 Red on Red #111

11-25-2009	#2
jonszr1 Join Date: Sep 2006 Location: lone pine and mammoth lakes Posts: 1,407	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

11-25-2009	#4
secondchance Join Date: Aug 2006 Location: McLean, VA Posts: 3,724	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?

11-25-2009	#6
1990 415 Join Date: Feb 2009 Location: Canada Posts: 309	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.