Delayed Exhaust Noise

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Jan 13, 2014 | 12:52 PM

79vetter

Thread Starter

Drifting

Joined: Feb 2005

Posts: 1,583

Likes: 5

From: Richardson Tx.

Delayed Exhaust Noise

'78 model with headers , 2.5 duals and about 300hp.
Whenever I gun it I get a roar from the engine and then about 1 second later I get another roar out of the mufflers. it doesn't sound right.

Jan 13, 2014 | 01:09 PM

Mike Ward

Race Director

Joined: Jul 2001

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Maybe you're travelling at the speed of sound?

Jan 13, 2014 | 01:23 PM

scottyp99

Le Mans Master

Joined: Mar 2008

Posts: 5,948

Likes: 72

From: Oxford MA-----You just lost the game!!!!

What mufflers do you have?

Scott

Jan 13, 2014 | 01:31 PM

79vetter

Thread Starter

Drifting

Joined: Feb 2005

Posts: 1,583

Likes: 5

From: Richardson Tx.

Quote:

Originally Posted by Mike Ward

Maybe you're travelling at the speed of sound?

Every public forum has its jacka**

These are generic mufflers from the 2.5 exhaust package that I got.

Jan 13, 2014 | 02:41 PM

jnealg

Burning Brakes

Joined: Apr 2010

Posts: 1,018

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From: Winston Ga.

thats weird, I cant imagine. got a video? I want to hear that.

Jan 13, 2014 | 03:02 PM

billla

Le Mans Master

Joined: Jun 2004

Posts: 6,231

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From: Seattle WA

St. Jude Donor '14

I wonder if you're just hearing the intake noise from the carb...

Jan 13, 2014 | 03:14 PM

Easy Mike

Team Owner

Joined: Jun 2000

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From: Southbound

Cruise-In II Veteran

Why does it not sound "right"? What were you expecting to hear?

Jan 13, 2014 | 04:46 PM

CaseyJones

Melting Slicks

Joined: Jul 2010

Posts: 2,503

Likes: 33

From: McGrady NC

St. Jude Donor '15-'16

I'd agree that it is probably the secondaries opening up on the carb instead of exhaust noise. It would be hard to tell where all the racket is coming from when you really romp it.

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Jan 13, 2014 | 06:06 PM

Shovels and Vettes

Le Mans Master

Joined: May 2008

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2022 C3 of the Year Finalist - Modified

Speed of SOund

Quote:

Originally Posted by Mike Ward

Maybe you're travelling at the speed of sound?

Thats a good one, made me laugh!!

Jan 13, 2014 | 06:30 PM

#10

Hammerhead Fred

Melting Slicks

Joined: Mar 2005

Posts: 2,093

Likes: 297

From: Midlothian VA

Quote:

Originally Posted by iwasmenowhesgone

Thats a good one, made me laugh!!

Perhaps your CAT is plugged.

Jan 13, 2014 | 06:32 PM

#11

Gordonm

Race Director

Joined: Dec 1999

Posts: 19,610

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From: Forked River NJ

Quote:

Originally Posted by Mike Ward

Maybe you're travelling at the speed of sound?

I laughed at this also. Mike has certainly stirred the pot a lot more than this. You got off easy with him

A little laughter is good. I agree with the other guys it may be carb noise

Jan 13, 2014 | 06:33 PM

#12

7t9l82

Le Mans Master

Joined: Oct 2010

Posts: 6,901

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From: melbourne florida

2023 C3 of the Year Finalist - Modified

speed of sound !

Jan 13, 2014 | 06:56 PM

#13

REELAV8R

Le Mans Master

Joined: Apr 2011

Posts: 6,284

Likes: 1,170

From: Hermosa

Quote:

Originally Posted by Mike Ward

Maybe you're travelling at the speed of sound?

Now technically, if he were traveling at the speed of sound how would he hear the exhaust out the tail pipe at all.

Jan 13, 2014 | 07:12 PM

#14

Mike Ward

Race Director

Joined: Jul 2001

Posts: 15,892

Likes: 42

Quote:

Originally Posted by REELAV8R

Now technically, if he were traveling at the speed of sound how would he hear the exhaust out the tail pipe at all.

We all know that qjet carbs are junk so the car would never quite reach Mach 1, just close..

Jan 13, 2014 | 09:03 PM

#15

REELAV8R

Le Mans Master

Joined: Apr 2011

Posts: 6,284

Likes: 1,170

From: Hermosa

Quote:

Originally Posted by Mike Ward

We all know that qjet carbs are junk so the car would never quite reach Mach 1, just close..

You're right. I think F-16's run Holleys.

Jan 14, 2014 | 10:32 AM

#16

scottyp99

Le Mans Master

Joined: Mar 2008

Posts: 5,948

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From: Oxford MA-----You just lost the game!!!!

Quote:

Originally Posted by goliath1

Every public forum has its jacka**

These are generic mufflers from the 2.5 exhaust package that I got.

Yep, and every public forum also has its stuck-up prig who can't take a joke. Lighten up, Francis.

Scott

Jan 14, 2014 | 10:37 AM

#17

wisoutlaw

Racer

Joined: Nov 2012

Posts: 340

Likes: 2

From: Port Washington WI

Quote:

Originally Posted by Hammerhead Fred

Perhaps your CAT is plugged.

Always make sure to have your cat pointed in a safe direction before unplugging him. It makes clean up easier.

Jan 14, 2014 | 07:30 PM

#18

Hammerhead Fred

Melting Slicks

Joined: Mar 2005

Posts: 2,093

Likes: 297

From: Midlothian VA

Quote:

Originally Posted by wisoutlaw

Always make sure to have your cat pointed in a safe direction before unplugging him. It makes clean up easier.

Funny and...

A plugged catalytic converter will cause a "roaring" sound.

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