Z06 Flutter/wet burble exhaust note
Thread Starter
Le Mans Master
Joined: Jun 2016
Posts: 5,426
Likes: 3,971
From: Cincinnati, OH
Z06 Flutter/wet burble exhaust note
Car is a 03 Z06 with factory manifolds+midpipe and a OBX looking catback (6.5" diameter and ~12-14" long straight through mufflers). Sound volume is nice, minimal drone inside and barks when you want it to.
However, on decel and or light throttle (even idle) there is a hint of this flutter/wet burble sound mixed in with the overall tone of the exhaust. Any way this is related to what I read about the factory H pipe having only a 1/2" diameter hole in the crossover tube? I have thought to cut it apart and open up the hole (if it's really only 1/2") but at that point I might as well go right to an x pipe (I always like X over H pipes). If this small hole is not the cause of the noise then I won't bother.
I tried searching but wasn't too sure what works would trigger the right results lol.
However, on decel and or light throttle (even idle) there is a hint of this flutter/wet burble sound mixed in with the overall tone of the exhaust. Any way this is related to what I read about the factory H pipe having only a 1/2" diameter hole in the crossover tube? I have thought to cut it apart and open up the hole (if it's really only 1/2") but at that point I might as well go right to an x pipe (I always like X over H pipes). If this small hole is not the cause of the noise then I won't bother.
I tried searching but wasn't too sure what works would trigger the right results lol.
Safety Car
Joined: Mar 2017
Posts: 3,769
Likes: 940
From: Orlando Florida
Sounds like you found the information you were needing -- reported multiple times to be the small hole in the factory H causing that wonderful boat burble. Also some interesting references -- including Engine Masters on YouTube/Motortrend -- that the X actually does add just a scintilla of power over the H.
Thread Starter
Le Mans Master
Joined: Jun 2016
Posts: 5,426
Likes: 3,971
From: Cincinnati, OH
Thanks for the confirmation. I'll most likely cut out the H pipe and replace it with a properly designed X pipe. I might look into calculating the proper placement downstream as well.
Thread Starter
Le Mans Master
Joined: Jun 2016
Posts: 5,426
Likes: 3,971
From: Cincinnati, OH
Le Mans Master
Joined: Sep 2014
Posts: 5,278
Likes: 539
From: Kelowna BC
https://www.onallcylinders.com/2012/...pes-vs-h-pipes
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