Pops and crackle in exhaust

[Coyotes55086]

Hey guys , I have an mbrp race catback with h pipe . When revving the engine and letting off the gas it does an awesome job with crackles and pop sounds . If I switched the H pipe to an x pipe , would it still keep that effect?

Is that the cause of the mufflers that make that sound , or what part of the exhaust is responsible for that ?

Sponsored

 

[3star2nr]

It will still pop and crackle with the X pipe. Its doing it because there is no resonator and your hoping off the gas so the Air fuel is a little rich.

My car pops bone stock when driven hard...

If You get headers or cat deletes the car will start spitting flames...

 

[Coyotes55086]

Lmao . Are u serious hahaha . Oh boy . Now I'm intrigued . If that's the case , how can I deny making it a dragon . That would be way too cool

Why do the headers make it spit flames? And with the headers have to be catless? Or could high flow work as well?

 

[3star2nr]

Lmao . Are u serious hahaha . Oh boy . Now I'm intrigued . If that's the case , how can I deny making it a dragon . That would be way too cool

Why do the headers make it spit flames? And with the headers have to be catless? Or could high flow work as well?

Has to be catless for flames.

What happens is when you hop off the gas pedal, you cut the air going into the engine abruptly which makes the afr go rich for a second when the rich mixture hits the exhaust pipes it ignites... That's the "poping" you hear.

With cats on the flames die off on the cats elements. With no element there the flames continue travelling along the pipe

 

[Coyotes55086]

Ahh ok makes sense now . Got you . Thanks for the reply . Is it possible that some catbacks make more crackle sounds than other though. Its seems the mbrp makes u at least hear then alot

 

[BmacIL]

Borla ATAK has tons of crackles and pops.

 

[3star2nr]

Ahh ok makes sense now . Got you . Thanks for the reply . Is it possible that some catbacks make more crackle sounds than other though. Its seems the mbrp makes u at least hear then alot

Yes actually it depends on how the muffler is designed. The more "free flowing" or straight thru the system the greater the chance for it to spit flames and crackle.

Also a shorter muffler will have less time for the exhaust to cool so anything marketted as "race mufflers" or "extreme" will tend to pop louder

With the stock mufflers the exhaust enters a series of chambers. And pipes and its lined with fiberglass. And thick metal. The exhaust has time to cool down as the speed decreases the pitch of the exhaust gets lower so it sounds deeper. And less "raspy" It also has a chance for the flames to die off in it.

Its funny how people always want "loud with no rasp or drone" lol once you understand the science of what's happening you'll get why asking for that is silly.

 

[nastang87xx]

Its funny how people always want "loud with no rasp or drone" lol once you understand the science of what's happening you'll get why asking for that in a cheap muffler is silly.

Fixed. But yes.

 

[BmacIL]

Yes actually it depends on how the muffler is designed. The more "free flowing" or straight thru the system the greater the chance for it to spit flames and crackle.

Also a shorter muffler will have less time for the exhaust to cool so anything marketted as "race mufflers" or "extreme" will tend to pop louder

With the stock mufflers the exhaust enters a series of chambers. And pipes and its lined with fiberglass. And thick metal. The exhaust has time to cool down as the speed decreases the pitch of the exhaust gets lower so it sounds deeper. And less "raspy" It also has a chance for the flames to die off in it.

Its funny how people always want "loud with no rasp or drone" lol once you understand the science of what's happening you'll get why asking for that is silly.

Completely false. A system with a tuned 1/4 wave resonating chamber built in (Corsa, AWE in particular) and a bottle resonator upstream of it produces loud, rasp-free and no drone.

 

[UserName]

*makes note to get headers and cat delete for flame show and intimidation *

 

[Coyotes55086]

*makes note to get headers and cat delete for flame show and intimidation *

Hahaha exactly

 

[nastang87xx]

Oh boy.........

Btw the reason why flames may shoot our the exhaust on letting off the throttle is the extreme retarding of timing. The ignition cycle happens so late that the combustion is happening as the exhaust valves begin to open. And no, don't ask a tuner to do this for you if you want to be taken even slightly serious.

Sponsored