High flow cat vs cat delete volume

[Coyotes55086]

So I'm still stumped and trying to understand, how does a cat delete make a car so much louder over a high flow cat? I've just ordered 50 cell cats and u can practically see right through these things . So why is it that a delete would be louder than a 50cell cat ? Can someone make sense of this for me? Theres nothing in the way of the 50 cell cat practiacally

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[FruityJudy]

For one you have something that will have resonance to it vs a delete that has non.

 

[Armageddon Turbo]

Honestly high flow cats and off road always sound almost the same to me...

 

[Coyotes55086]

Honestly high flow cats and off road always sound almost the same to me...

Ypu mean it sounds the same as having no cats ? In what way ? Volume and the sound?

 

[Zelek]

When I swap between my catted ARH lead pipes to my catless ARH lead pipes, there's a massive volume difference. Cats are just really good at muffling the sound.

 

[Coyotes55086]

Anyone else ?

 

[EFI]

So I'm still stumped and trying to understand, how does a cat delete make a car so much louder over a high flow cat?

It doesn't, the high flow cat you just pictured will be 99% as loud as a true cat delete.

However, that is an extreme high flow cat...it's pretty much just a bulge in a pipe with just about nothing inside. Most other high flow cats have a decent amount of material in there. Not as much as stock, but alot more than the one shown. That's why most high flow catted setups are not as loud, and definitely not as raspy.

 

[Coyotes55086]

It doesn't, the high flow cat you just pictured will be 99% as loud as a true cat delete.

However, that is an extreme high flow cat...it's pretty much just a bulge in a pipe with just about nothing inside. Most other high flow cats have a decent amount of material in there. Not as much as stock, but alot more than the one shown. That's why most high flow catted setups are not as loud, and definitely not as raspy.

You just made my day man hahaha . I'm really hoping you're right. Cuz I'm trying to get a special while you out of the car as I can without doing a cat deletes or long tubes.

 

[Burkey]

Anyone else ?

I went from 100 cell to no cats. The difference was near enough to zero.

 

[Unas2k5]

So my car won’t be louder when I gut my high flow cats ? I don’t want it louder I just have to remove them for FI

 

[Unas2k5]

I have Stainless Works 1 7/8 long tube headers, High flow cats, catbacks

 

[Angrey]

Anything that redirects pressure and sound pulses is going to dissipate sound. The less it interrupts it, the less it will reduce the volume level leaving the tips.

There's an entire industry of science and engineering that try to find optimal ways of reducing the sound without markedly impeding the flow volume. Given the dimensional constraints underneath a typical car, that's a difficult thing to do.

The higher the "flow" of the cat, the more closely it will sound (dB or volume wise) to a straight through system.

 

[Unas2k5]

Anything that redirects pressure and sound pulses is going to dissipate sound. The less it interrupts it, the less it will reduce the volume level leaving the tips.

There's an entire industry of science and engineering that try to find optimal ways of reducing the sound without markedly impeding the flow volume. Given the dimensional constraints underneath a typical car, that's a difficult thing to do.

The higher the "flow" of the cat, the more closely it will sound (dB or volume wise) to a straight through system.

Thank you so now I know it won’t be obnoxiously loud. I have no choice though at my power level. Does it always end up being very raspy? Stainless Works said it will be very raspy and will pop a lot even on E85.

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