No Mufflers....Good or BAd

[Mikie]

This is just an idea,

Put your factory H pipe back on, Do the flowmaster dump mod I came up with and have awesome drone with no rasp.

Click on the link in my sig to see the write up on Mustang world. It shows great pics.

 

[blackGT25]

ya.. your car will be alot louder.. so loud it sounds like a truck, not a muscle-car... and you will lose HP... put sum mufflers on... any i dont care man.. just put em on!

 

[Mustang5L5]

I got the american thunder catback on my 96 gt auto....its quiet as hell and dosnt really sound to much different than my factory....i dont have an h-pipe or anything.....what gives? i need an h-pipe to make it loud and mean sounding, anyone make an x that will fit my auto? My american thunder has deltaflow 40's i think?

That's what I have. American Thunder 2-chambers with delta flow 40 mufflers.

It's pretty loud.

 

[merc123]

I took mine off for a week just to see what it would be like and I came to a few conclusions...

2. Like someone else said, it did seem slower....dont know how much truth there is to that though.

It takes off ALOT and is true. I raced a 5.0 with after I got my dynomax mufflers. We were dead even. Disconnected the mufflers right at the H-pipe. We lined up again and he walked me by 5 cars. There is NO torque. I couldn't barely squeal the tires and couldn't do it in 1st-2nd gear shift.

 

[Mikie]

Merc speaks form experience and I can vouch on that (I learned the hard way too).

The torque and hp were actually increased by freeing the exhaust up, but it changed the whole powerband and made this "unusable hp and torque"

The cars hp and tq curves have been altered and you would probably have to turn 9,000 rpm to be able to get to the usable hp band.

One way for you mufflerless open exhausted guys to re-adjust your curve be able to use the hp and torque is to add steep gears such as 4.30s

This will definately help.

Also any time you change modifications (like swapping h pipes) it takes the computer a few days of learning what youve done and make the proper adjustments.

Do not swap pipes then go out and run a buddy at the strip as you are very vulnerable until the computer re learns and gives you full benefit of the mod.

 

[merc123]

Above 80 though the car screamed. You could get to 100 faster than half a blink of an eye

 

[01MachGT]

Magnaflows sound good once you get rid of the cats. I love how mine sounds now that I have the OR/X pipe

 

[Stanglover96]

What causes the popping sound? I have a MAC OR/H pipe with 40 series flows,although it is loud, it pops when I slow down or when I rev it up.

 

[merc123]

catalytic convertors so I've been told.

 

[Stanglover96]

What about high flow cats?

 

[merc123]

I would think the inherent design of a cat would cause the popping. Essentially the cat is the focal point for various chemical reactions so it's going to more than likely pop. Or so I would think.

 

[313Stang]

my 40's didn't make any audible difference from stock until I had the cats removed... after that I couldn't believe it was the same car...

 

[2kyellowgt]

I love the open pipe sound. I want to get rid of my Borla catback and put on a pair of Dynomax race mufflers with turndowns. Do you guys think the lose of power would be the same as open exhaust??

 

[Fast Eddie 2k1]

No mufflers are a bad thing. You need some back prerssure.