I was told Longtubes will make my exhaust QUIETER.

Craig Mack

Craig Mack

Busted Buffing the Bishop
Founding Member
Mar 9, 2002
801
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Lake Mary, FL
#1
I was on the corral talking about exhaust combos, and the topic of Longtubes got brought up. Two people with longtubes said it made their exhausts quieter and more mellow at idle and cruising....WTF? One of my friends has a '96 Impala SS with a flowmaster catback, and when he added longtubes, it made a NOTICEABLE difference. It was not only louder at idle and when revved, but it had more SNARE to it...it sounded meaner and more p!ssed off.

It doesn't make sense how a long tubular header that flows gases much more efficiently and faster would be QUIETER than the choking/restrictive stock manifolds. I have a UPR o/r X and bassani catback, and while it has a great tone and is loud, I want it noticeably louder, so I was going to get some Longtubes for xmas, but am reconsidering after hearing this, although it doesn't make sense to me.

I was hoping to gain several db's and add more bark to my exhaust with some LT's, and logically it seems like they would. Someone please help me out here.

:mad: :rolleyes:
 

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#2
ive heard two cars with o/r midpipes and after they put on the Lts it made there car quieter. i dont know why, but iv seen it happen twice. thats not saying that it will happen with every combo, but i dont know. i ask them tonight what there setups are. (o one was a 5.0 the other a 4.6)
 
#5
Craig Mack said:
I was on the corral talking about exhaust combos, and the topic of Longtubes got brought up. Two people with longtubes said it made their exhausts quieter and more mellow at idle and cruising....WTF? One of my friends has a '96 Impala SS with a flowmaster catback, and when he added longtubes, it made a NOTICEABLE difference. It was not only louder at idle and when revved, but it had more SNARE to it...it sounded meaner and more p!ssed off.

It doesn't make sense how a long tubular header that flows gases much more efficiently and faster would be QUIETER than the choking/restrictive stock manifolds. I have a UPR o/r X and bassani catback, and while it has a great tone and is loud, I want it noticeably louder, so I was going to get some Longtubes for xmas, but am reconsidering after hearing this, although it doesn't make sense to me.

I was hoping to gain several db's and add more bark to my exhaust with some LT's, and logically it seems like they would. Someone please help me out here.

:mad: :rolleyes:
Click to expand...
Hey Craig. From what i have heard in person and from people, the headers smootht he sound out and it sounds mellower but when i heard the car at high RPMS(4500-redline) it was ridiculously loud and really mean sounding. Get the longtubes anyway for the extra hp. I'm sure you'll still like the sound.

BTW , Where da fu*k is that sound clip you promised!?!?!? :mad: I wanna hear one before the header install.
 
#9
HoustonGT said:
Damn straight! I'm considering selling my organs to buy a Cobra now :(
Click to expand...

Dude, I just got back from looking at apartments...some nice Japanese guy walking his dog purposely changed paths to walk over to my driveway and tell me how nice my car sounded. He has a TT 300zx that runs 12's and he was like "bro your cobra sounds REALLY REALLY nice, I mean it sounds really mean"...I was really surprised and was like thanks man.

In fact, the first day I even got my bassani catback,before it was even broken in (it gets louder and a lot edgier btw) I went over to my friends house, and revved, and some middle aged "enthusiast" came outside and told me how amazing it sounded.

That and the fact I gained major mph from switching to the bassani is the reason I can't switch it out...it's too good of a muffler. I just want it in your face loud at idle and low cruising. The thing about the bassani is its audible, but tame at these instances, but gets super loud when you mash the throttle down.

Anyways, just wanted to report you of another compliment on how amazing it sounds on my DOHC mustang. :D :flag: :spot:
 
#10
Craig Mack said:
Dude, I just got back from looking at apartments...some nice Japanese guy walking his dog purposely changed paths to walk over to my driveway and tell me how nice my car sounded. He has a TT 300zx that runs 12's and he was like "bro your cobra sounds REALLY REALLY nice, I mean it sounds really mean"...I was really surprised and was like thanks man.

In fact, the first day I even got my bassani catback,before it was even broken in (it gets louder and a lot edgier btw) I went over to my friends house, and revved, and some middle aged "enthusiast" came outside and told me how amazing it sounded.

That and the fact I gained major mph from switching to the bassani is the reason I can't switch it out...it's too good of a muffler. I just want it in your face loud at idle and low cruising. The thing about the bassani is its audible, but tame at these instances, but gets super loud when you mash the throttle down.

Anyways, just wanted to report you of another compliment on how amazing it sounds on my DOHC mustang. :D :flag: :spot:
Click to expand...
Yea, thanks for TELLING me how good it sounds (sarcastic and angry undertone)
 
#14
myponyrocks said:
friction is what makes the exhaust note... so a smoother flowing pipe would quiet the sound down.
Click to expand...

That makes sense, but then why would it get louder at WOT? Kinda like how my flows were louder at idle than my bassanis, but my bassanis are louder at WOT? and high throttle load?

Maybe I should take a hammer and ding up my exhaust to cause more friction and get more noise. :rolleyes:
 
#15
ok I dont know the exact reason, but by using a comparison sorta theory heres what I think....

I was gonna compare whistling to blowing but then thought of all the dirty things people would say :p

just think of it this way, better flowing means more air is going through without hitting the noise making restrictions that were there before. It still makes a noise because it has to have some resistance, any how at WoT its more airflow, the resonance is deeper but its not as loud.

Now take the more restrictive pipe, its hitting "baffles" or whatever and making a lot of noise its not as deep but its louder because the added backpressure, at WoT its probly still louder than the free flowing, but not as deep (heres where whistling comes in and heres where the jokes start. The tighter you purse your lips the more shrill (high pitched) theres more back pressure, Theres a point where you cant whistle any more because your mouth is completely closed. Now go back to the other side, the wider your mouth the deeper the sound, the more air you pass through your lips the louder it is, but its not as loud as the whistle technique above... theres also a poin here where your mouth is opene too much and no sound comes out at all...)

Ok can I have a shovel to dig myself a hole now? I'm gonna hide for a while
 
#16
myponyrocks said:
ok I dont know the exact reason, but by using a comparison sorta theory heres what I think....

I was gonna compare whistling to blowing but then thought of all the dirty things people would say :p

just think of it this way, better flowing means more air is going through without hitting the noise making restrictions that were there before. It still makes a noise because it has to have some resistance, any how at WoT its more airflow, the resonance is deeper but its not as loud.

Now take the more restrictive pipe, its hitting "baffles" or whatever and making a lot of noise its not as deep but its louder because the added backpressure, at WoT its probly still louder than the free flowing, but not as deep (heres where whistling comes in and heres where the jokes start. The tighter you purse your lips the more shrill (high pitched) theres more back pressure, Theres a point where you cant whistle any more because your mouth is completely closed. Now go back to the other side, the wider your mouth the deeper the sound, the more air you pass through your lips the louder it is, but its not as loud as the whistle technique above... theres also a poin here where your mouth is opene too much and no sound comes out at all...)

Ok can I have a shovel to dig myself a hole now? I'm gonna hide for a while
Click to expand...
Uhhhh, its not simply the air making the noise, its the engine too. I think the reason longtubes quiet and smooth the sound is the length and the bends. Why else would some mufflers have "chambers" in them? If your theory was correct, mufflers would simply be small diameter pipes for high pitched and large piping for deeper sounds.
 
#17
ok trombone and trumpet, same ammount of air in, totaly different sound out... too many factors for my simple mind to examine, but I'm thinking pipe size (restriction), pipe length (ammount of time for the sound to define itself), and the pipe opening (ammount of sound that comes out) are all factors. Your engine with pipe a or b is making the same ammount of exhaust, however the above are things that change the tone and how much of it comes out?

I'm no scientist, I'm far from a rational thinker (I had APC lights on my car for a month), just trying to figure this out as well.

I agree baffles cause sound through friction, but I think that the ammount of time the sound has to define itself has something to do too. ? I confused myself now :p
 
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