how to get rid of rasp in exhaust?

Reply Subscribe

Thread Tools

Search this Thread

May 17, 2011 | 08:42 PM

#41

Steve Gunn

TECH Resident

Joined: Feb 2002

Posts: 843

Likes: 0

From: Roseville, Ca.

Cats will get rid if rasp as well as anything.

May 17, 2011 | 08:52 PM

#42

dlandsvZ28

TECH Fanatic

Joined: Jun 2003

Posts: 1,869

Likes: 99

Quote:

Originally Posted by antsls1

I have a 98 camaro m6 with LT headers ORY pipe (no cats) and straight pipes (I pipe goes into a Y pipe then to CME tips). It has a lot of rasp I'm the 2300-2600 rpm range. It is very very loud. I like the smooth deep tone of the exhaust other than the rasp what do I do to get rid of it? Thanks guys and gals!

Each setup is different. So what might work dependent on setup on one car might not work on another unless the entire system is the same.

I have ARH LT's into cats then into an I pipe into a Magnflow catback and I still had rasp-even with the ARH cats.

So I added two bullet Magnaflow's behind the Magnaflow catback muffler and it eliminated rasp completely. IMO sound almost like true duals.

See pic in link below.

http://www.flickr.com/photos/1835930...7623345499537/

Last edited by dlandsvZ28; May 18, 2011 at 12:11 AM.

May 17, 2011 | 10:29 PM

#43

INMY01TA

11 Second Club

iTrader: (1)

Joined: Apr 2003

Posts: 3,235

Likes: 2

From: Crofton Md.

No driveshaft loop Torchd?

May 18, 2011 | 08:19 AM

#44

Black98T/A

TECH Apprentice

iTrader: (5)

Joined: Feb 2008

Posts: 342

Likes: 0

From: Cent. FL

Should I get the flowmaster merge guys?

May 18, 2011 | 08:34 AM

#45

MikeWS6

TECH Addict

Joined: Apr 2009

Posts: 2,354

Likes: 2

Quote:

Originally Posted by Steve Gunn

Cats will get rid if rasp as well as anything.

This is a fact but for some reason everyone thinks you cant make good power with cats.

May 18, 2011 | 08:44 AM

#46

'02TA

TECH Apprentice

Joined: May 2006

Posts: 361

Likes: 0

From: South Florida

True duals = No Rasp

/thread

May 18, 2011 | 08:56 AM

#47

MikeWS6

TECH Addict

Joined: Apr 2009

Posts: 2,354

Likes: 2

Quote:

Originally Posted by '02TA

True duals = No Rasp

/thread

Meh I dont have any rasp with mine. If I took the cats off it would be a different story though.

May 18, 2011 | 09:18 AM

#48

'02TA

TECH Apprentice

Joined: May 2006

Posts: 361

Likes: 0

From: South Florida

I went through 9 different exhaust setups trying to get rid of the rasp looking for the right tone. Everything I tried sounded like **** (raspy) after I took the cats out but then I got true duals and all was right in the world.

LS1 Tech Stories

The Best V8 Stories One Small Block at Time

Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Pouria Savadkouei

Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Verdad Gallardo

7 Most Reliable High-Performance Engines GM Has Ever Built

Verdad Gallardo

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Verdad Gallardo

6 Common C5 Corvette Failures and What's Involved In Repairing Them

Pouria Savadkouei

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Verdad Gallardo

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Pouria Savadkouei

Top 10 Most Powerful Chevy Trucks Ever Made!

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Verdad Gallardo

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Verdad Gallardo

May 18, 2011 | 09:32 AM

#49

MikeWS6

TECH Addict

Joined: Apr 2009

Posts: 2,354

Likes: 2

Quote:

Originally Posted by '02TA

Wow. Im glad I found one I like the first time around. Thats alot of money.

May 18, 2011 | 11:05 AM

#50

Black98T/A

TECH Apprentice

iTrader: (5)

Joined: Feb 2008

Posts: 342

Likes: 0

From: Cent. FL

Quote:

Originally Posted by '02TA

What's the deal with these cars without cats? I've had an LT1 Vette and Formula 350 both with no cats and they both sounded great. My WS6 sounds like ****.

May 18, 2011 | 02:59 PM

#51

TORCHD 02 TA

TECH Senior Member

iTrader: (39)

Joined: May 2006

Posts: 7,883

Likes: 3

From: Chicago

Quote:

Originally Posted by Black98T/A

So you're saying it's a waste?

No get the Flowmaster merge.. its a good design for the exhaust gases

May 18, 2011 | 04:00 PM

#52

TORCHD 02 TA

TECH Senior Member

iTrader: (39)

Joined: May 2006

Posts: 7,883

Likes: 3

From: Chicago

Quote:

Originally Posted by INMY01TA

No driveshaft loop Torchd?

Nah I hardly go to the track...

May 18, 2011 | 08:26 PM

#53

Black98T/A

TECH Apprentice

iTrader: (5)

Joined: Feb 2008

Posts: 342

Likes: 0

From: Cent. FL

Quote:

Originally Posted by TORCHD 02 TA

No get the Flowmaster merge.. its a good design for the exhaust gases

I have a 3 inch tsp Y and stock ws6 I pipe...this the one to get?
http://www.summitracing.com/parts/FLO-Y300350/

May 19, 2011 | 07:30 AM

#54

gofastwclass

TECH Addict

iTrader: (2)

Joined: Aug 2009

Posts: 2,949

Likes: 28

From: KCMO

Quote:

Originally Posted by Black98T/A

What's the deal with these cars without cats? I've had an LT1 Vette and Formula 350 both with no cats and they both sounded great. My WS6 sounds like ****.

It's the firing order. Different firing order needs different exhaust to sound "cool."

A friend had a 5.0 Mustang way back when and another friend and I loved the sound. Friend #2 buys the same exact mufflers for his LT1 Camaro and it sounded like @$$... all because of the firing order. The exhaust guy even told him that before he put it on.

Funny part is my Thunderbird has no cats and sounds great - but would be way too quiet for most people on this board which is perfect for that car. My TA on the other hand...

May 19, 2011 | 11:55 AM

#55

TORCHD 02 TA

TECH Senior Member

iTrader: (39)

Joined: May 2006

Posts: 7,883

Likes: 3

From: Chicago

Quote:

Originally Posted by Black98T/A

I have a 3 inch tsp Y and stock ws6 I pipe...this the one to get?
http://www.summitracing.com/parts/FLO-Y300350/

That's the exact same one that I am using on my car

May 19, 2011 | 04:07 PM

#56

'02TA

TECH Apprentice

Joined: May 2006

Posts: 361

Likes: 0

From: South Florida

Quote:

Originally Posted by Black98T/A

What's the deal with these cars without cats? I've had an LT1 Vette and Formula 350 both with no cats and they both sounded great. My WS6 sounds like ****.

The y-pipe design can't handle the increased flow from removing the cats ,but once I took it out the specific noise that I hated was gone so take that as you will.