C4 General Discussion General C4 Corvette Discussion not covered in Tech

muffler question

Thread Tools
 
Search this Thread
 
Old Apr 23, 2006 | 01:39 PM
  #1  
Buttz's Avatar
Buttz
Thread Starter
Racer
 
Joined: Aug 2005
Posts: 436
Likes: 0
From: milton wi
Default muffler question

Do you think its possible since I have muff elminators on my car now to run a muffler like this just before the Y pipe?

http://www.flowmastermufflers.com/hp2.html
Reply
Old Apr 23, 2006 | 04:02 PM
  #2  
Midnite 88's Avatar
Midnite 88
Drifting
10 Year Member
 
Joined: Nov 2000
Posts: 1,428
Likes: 1
From: Jacksonville FL
Default

Are you saying that you would replace your main cat with the muffler? You could do it if you wanted to. You would have to cut the flanges off of the cat and weld them to the muffler.
Reply
Old Apr 23, 2006 | 04:31 PM
  #3  
Buttz's Avatar
Buttz
Thread Starter
Racer
 
Joined: Aug 2005
Posts: 436
Likes: 0
From: milton wi
Default

I havent looked under my car yet but is the cat connected to the Y pipe?
Reply
Old Apr 23, 2006 | 05:20 PM
  #4  
Midnite 88's Avatar
Midnite 88
Drifting
10 Year Member
 
Joined: Nov 2000
Posts: 1,428
Likes: 1
From: Jacksonville FL
Default

The main cat is between the front "Y" and the rear "Y". The pre-cats are straight down from the manifolds.
Reply
Old Apr 24, 2006 | 12:54 AM
  #5  
GREGGPENN's Avatar
GREGGPENN
Race Director
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Nov 2003
Posts: 12,220
Likes: 446
From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
C4 of Year Winner (appearance mods) 2019
Default

Originally Posted by Buttz
Do you think its possible since I have muff elminators on my car now to run a muffler like this just before the Y pipe?

http://www.flowmastermufflers.com/hp2.html
The options listed on the page you posted all have connections SMALLER than 3". The single pipe connecting your front and read "Y" is 3". DON'T go smaller. That middle section is a contraint to your system. If anything, go bigger.

Another consideration is the main cat acts like a muffler. Removing it to put a muffler in it's place doesn't gain much unless you employ a strong muffler. In that case, I gotta ask: Why elims if you want quiet?

I assume you're looking to add muffler upstream to avoid cluttering up the rear view? Consider targa mufflers -- which come is a couple of variations.

As alternatives, you could put glass packs in the bends before the final stretch. And, you might be able to get glass packs in the front "Y".
Reply
Old Apr 24, 2006 | 12:58 AM
  #6  
CentralCoaster's Avatar
CentralCoaster
Team Owner
 
Joined: May 2002
Posts: 24,337
Likes: 25
From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
Default

What he said.
Reply
Old Apr 24, 2006 | 08:34 AM
  #7  
mseven's Avatar
mseven
Le Mans Master
 
Joined: Feb 2005
Posts: 5,146
Likes: 3
From: The Motor City
Default

I wouldn't
Reply
Old Apr 24, 2006 | 09:12 PM
  #8  
Buttz's Avatar
Buttz
Thread Starter
Racer
 
Joined: Aug 2005
Posts: 436
Likes: 0
From: milton wi
Default

I took the cat off and it crazy loud. but dont tell anyone!!
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
story-1

Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

 Joe Kucinski
story-2

Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

 Verdad Gallardo
story-3

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-4

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

 Michael S. Palmer
story-5

10 Revolutionary 'Corvette Firsts' Most People Don't Know

 Joe Kucinski
story-6

5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

 Michael S. Palmer
story-7

2027 Corvette vs The World: Every C8 vs Its Closest Competitor

 Joe Kucinski
story-8

10 Most Common Corvette Problems of the Last 20 Years!

 Joe Kucinski
story-9

5 MOST and 5 LEAST Popular Corvette Model Years in History!

 Joe Kucinski
Old Apr 25, 2006 | 03:19 PM
  #9  
GREGGPENN's Avatar
GREGGPENN
Race Director
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Nov 2003
Posts: 12,220
Likes: 446
From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
C4 of Year Winner (appearance mods) 2019
Default

I'd put a cat back on. The cat will quiet it down and get you back to legal. Two birds with one stone.

Putting dual cats in the front "Y" is another option.

Your year is not posted, but I'm guessing 84/85 which only had one cat. You only mentioned one cat.

Edit:
You should know that any muffler will induce as much (or more) backpressure as a converter does. So, you gain nothing by going from a converter to a muffler for quieting. OTOH, if you keep a converter, you stay quieter and legaler. New word I invented (legaler), like it?

Last edited by GREGGPENN; Apr 25, 2006 at 03:38 PM.
Reply

Get notified of new replies

To muffler question





All times are GMT -4. The time now is 03:40 PM.

story-0
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-1
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-2
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-3
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-4
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-5
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-6
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE
story-7
2027 Corvette vs The World: Every C8 vs Its Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-24 16:12:42


VIEW MORE
story-8
10 Most Common Corvette Problems of the Last 20 Years!

Slideshow: 10 major Corvette problems from the last 20 years.

By Joe Kucinski | 2026-04-14 16:37:05


VIEW MORE
story-9
5 MOST and 5 LEAST Popular Corvette Model Years in History!

Slideshow: 5 most and least popular Corvette model years.

By Joe Kucinski | 2026-04-08 13:25:01


VIEW MORE