| [GMCnet] Re: Quiet Exhaust Question? [message #368558 is a reply to message #368539] |
Tue, 25 January 2022 09:22   |
James Hupy
Messages: 6806
Registered: May 2010
Karma:
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Senior Member |
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GM experimented with no mufflers, by denting the exhaust pipe as well as
the tailpipes. It was good when the cars were new, but the aftermarket
exhaust providers raised "HOLY NED" with them because they had to provide
similar exhaust systems. What usually happened was that the OEM stuff got
replaced from manifold flanges to end of tailpipe with conventional
systems. Customers were none to happy about the bills for that. GM changed
back in a couple of years. Then came "catastrophic convertes" resonators,
etc.
Jim Hupy
Salem, Oregon
On Tue, Jan 25, 2022, 7:13 AM Keith V wrote:
> I fixed the rap by running the exhaust straight out the back rather than
> pointed out the pass side. I barely hear it at all now 🙂
> ________________________________
> From: Terry via Gmclist
> Sent: Sunday, January 23, 2022 4:51 PM
> To: gmclist@list.gmcnet.org
> Cc: Terry
> Subject: [GMCnet] Re: Quiet Exhaust Question?
>
> Mine is quiet with 2 mufflers up front and a long pipe to the right rear
> corner. Pipe is 2.5 inch diameter. If I ever woke anybody up in a campground
> they must have been sleeping in the road. Maybe the insides of one or both
> of your mufflers has corroded away and is not cancelling the sound wave.
> Headers up front are definitely louder than cast iron manifolds and I also
> have those courtesy of the P.O.. I also have the fender liners installed.
> Sitting in the driver's seat I can barely hear the engine running. Engine
> tuning can make a big difference in the amount of sound emitted from
> headers, but usually will be accompanied by loss of normal power output
> and poor fuel economy. If it runs well and smooth I would check/replace the
> mufflers first,especially since I have the equipment to tackle that job. A
> resonator is just another muffler and will quiet it more (and eliminate
> exhaust "crack") but also may cost just as much to procure and get
> installed as replacing the mufflers. Depends on where and how you shop.
> --
> Terry Kelpien
>
> ASE Master Technician
>
> 73 Glacier 260
>
> Smithfield, Va.
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