Pronounced Resonance/Reverberation - Pontiac G8 Forum: G8 Forums -
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post #1 of 2 (permalink) Old 10-15-2010, 08:38 AM Thread Starter
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Join Date: Jun 2010
Location: CT
Posts: 176
Pronounced Resonance/Reverberation

Hey everyone,

Just bought a solo mach unbalanced kit and it has been working out wonderfully. However, I am experiencing a resonance/reverberation when traveling under moderate throttle right around 2100-2300 rpm. This is most pronounced when traveling on an inclined surface and usually in 5th gear as 4th and 6 avoid this trouble zone.

I am going to go back to the shop and have everything re-tightened and double checked; just wondering if this is par for the exhaust or something that can be fixed?

Last edited by Strayer; 10-15-2010 at 08:43 AM.
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post #2 of 2 (permalink) Old 11-09-2010, 07:45 AM
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There are a few things to check:

1. Make sure all clearances are acceptable (ex: muffler clearance from tunnel)
2. Tighten the heat shield. It is known to come loose.
3. Make sure J-pipes measure 9 inches from the end cap to the start of the bend. Any difference can make a big difference. Both sides must be equal. From there, you can tweak it in 1/2 inch increments if needed.

I hope this helps.

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