[bloodusmc]

Is it bad for the engine or HP to remove the catalytic converters?
Will I loose any HP or torque?


I just want my exhaust to sound louder thats why I want to remove it.

[9986paulk]

Im pretty sure youll lose some back pressure which means you'll lose some low end power. But it should increase top end horsepower a little.

[ESG-642T]

Yep, what mufflers do you have?

Removing cats form stock exhaust produces an odd sound.

[2002 BLK GT]

Originally Posted by bloodusmc Is it bad for the engine or HP to remove the catalytic converters? Will I loose any HP or torque? I just want my exhaust to sound louder thats why I want to remove it.

I thought you said that you wanted to stay legal? It will sound bad with the stock ones if its an aftermarket not that much depending on the set up.

[bloodusmc]

I have flowmasters super 44's
I wanted to stay legal I thought the sound of the mufflers will be good enough. But I can like hear all the other exhaust driving around they are way louder than mine. will removing the cats with flowmasters 44s sound good?

anyone has a clip?

My current setup is Straight pipes with 44's

[chromestang01]

yes yes yes removing your cats will make it louder....i have 40's and i gutted the front cats and removed the back cats and it sounds just like a GT,at idel and drive.I get alot of attention people saying they like my car!the best thing is goin to a drive through window and hearing your car echo off of the walls,OMG its heaven and everyone looks!

[ESG-642T]

1.) does not sound like a GT.

2.) It may be as loud as one, but does not sound like one.

3.) Get somebody else to drive your car, and you drive their car and have them pass you up. You would be surprised. I used to think everybody's car sounded louder until I actually had somebody DRIVE my car while I wasn't in it.

[9986paulk]

At idle you can get it pretty close to a GT. Anything above that though, no way. I like ot put it like this, you might be able to get the same tone as the GT but not the same note(because of the firing order, and obviously 2 more cylinders). A guy in a GT pulled up by us at the end of the day wprking yesterday and I thought it was a 6 til he pulled away, then you hear the V8.

[horizontalkev]

How can you tell by just the exaust if its V6 or V8 without seeing if its a GT or not?

[2002 BLK GT]

^Cuz a V8 sound mean like a muscle car, loud and a V6 sounds loud but has a different tone "lower" actually from 3k rpm and up and can know easily....

[bloodusmc]

I just want it to sound like a monster.

[ReverendDexter]

Originally Posted by horizontalkev How can you tell by just the exaust if its V6 or V8 without seeing if its a GT or not?

Experience. Hang around enough of 'em, and you'll figure it out. Best way I can describe it is that V8s sound a little deeper and "rougher".

It's the same thing as hearing the difference between a V8 and a V12, or between an I4, a flat-4, and a V6. They all have their own unique sound.

I would look into music theory to explain it. I think being a different "note" is very accurate. At the same rpm, a V6 is going to produce a sound 75% of the frequency of a V8. If we assume that a V8 is making an 'A' (440 Hz) at a certain rpm, a V6 at that same rpm would produce 330Hz, which is about an 'E', a V12 would produce a note that's at 150% of the frequency, or 660 Hz, which is also an 'E', but of twice the "pitch" of the V6.

Exhaust routing has a lot to do with it to. The above example assumes that you have headers that put each pulse in line. Typical domestic headers don't do that, and you have gaps in the sound.... "baht baht .... baht baht baht baht baht.... baht", which is also going to change the tone, maybe give you multiple "notes" at once...

You'll have to forgive me, my music theory knowledge is stretched to it's limit at this point, hahaha.

[horizontalkev]

Originally Posted by ReverendDexter Experience. Hang around enough of 'em, and you'll figure it out. Best way I can describe it is that V8s sound a little deeper and "rougher". It's the same thing as hearing the difference between a V8 and a V12, or between an I4, a flat-4, and a V6. They all have their own unique sound. I would look into music theory to explain it. I think being a different "note" is very accurate. At the same rpm, a V6 is going to produce a sound 75% of the frequency of a V8. If we assume that a V8 is making an 'A' (440 Hz) at a certain rpm, a V6 at that same rpm would produce 330Hz, which is about an 'E', a V12 would produce a note that's at 150% of the frequency, or 660 Hz, which is also an 'E', but of twice the "pitch" of the V6. Exhaust routing has a lot to do with it to. The above example assumes that you have headers that put each pulse in line. Typical domestic headers don't do that, and you have gaps in the sound.... "baht baht .... baht baht baht baht baht.... baht", which is also going to change the tone, maybe give you multiple "notes" at once... You'll have to forgive me, my music theory knowledge is stretched to it's limit at this point, hahaha.

Very well explained it makes sence.
Lol

[chromestang01]

Originally Posted by ESG-642T 1.) does not sound like a GT. 2.) It may be as loud as one, but does not sound like one. 3.) Get somebody else to drive your car, and you drive their car and have them pass you up. You would be surprised. I used to think everybody's car sounded louder until I actually had somebody DRIVE my car while I wasn't in it.

then again thats his opinion so who gives a shyt..do wat you want to do and have fun,dont change your mind on something bc sum azz tells you something negative about your decision

[2002 BLK GT]

+1^

[bloodusmc]

I am gonna do it tomorrow.

[bloodusmc]

My mechanic just told me if I remove the converters the check engine light will be on the whole time.

is that true with mustangs?
I was surprised because no one here told me about that lol

[Cricket]

it throws a code, but you can elimnate that by running MILs or turning turning your o2 sensors off.

[ESG-642T]

Originally Posted by chromestang01 then again thats his opinion so who gives a shyt..do wat you want to do and have fun,dont change your mind on something bc sum azz tells you something negative about your decision

Don't be stupid.
A v6 wont ever sound like a GT, its not possible without swapping the motor.

Didn't say it won't sound GOOD, just it will never sound like a gt.

[bloodusmc]

OMG why does everyone think I want it to sound like a GT lol. I never said anything about a GT.

I just want it to sound loud and good.