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#1
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Resonators..... should I use them on my 68 Wagon
Earlier this summer, I put a pair of Dynomax 17749 mufflers and 2 1/2" Flowmaster tailpipes on my clone wagon. It has the RA exhaust manifolds and currently has a 68 350 engine built to HO specs. The tailpipes now run out the back of the car under the rear bumper.
I expected the new mufflers to quiet down the car a lot. In the end, it did get rid of the drone, but is still fairly loud when idling. At this point, I'm not sure if I will change anything or not. I have a new (still in the box) stock Gardner exhaust system for my 68 Firebird (400 HO spec engine) and it has a pair of resonators that go in front of the transverse muffler. I'm wondering if maybe I could put a pair of the tube type resonators in front of the dual mufflers on the wagon and what that would do to the sound at idle. I'm okay if performance suffers a little as I'll never push the car hard anyway. Short of that, I suppose I could swap out the mufflers again or put sound deadening mat under the carpet. I don't think an X-pipe would help at idle, or would it? I'd like to take the easiest route possible. Looking for suggestions. Thanks Old Joe
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68 Firebird Convertible 68 GTO Clone (Tempest) Wagon |
#2
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I would not break up my Gardner exhaust set….. That said, quiet is cool and I’m sure a local muffler shop could set you up with something similar to what came in your Garnder set.
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#3
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In my own experience an H pipe will take away some of the objectionable noise as well as pick up a little low, and mid range torque. I used a 2 inch pipe for the crossover between the head pipes in a few customer cars as well as my own.
It will change the exhaust note some, just to be forewarned, but I always thought it was favorable to just true dual exhaust sound, especially if the exhaust crackled such as glass pack mufflers do. |
#4
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My '66 GTO has a solid roller with Doug's round port headers with 3" exhaust all the way back. I used Dynomax Super Turbo mufflers which were fine drone-wise, but too loud. I added resonators downstream of the mufflers like the stock setup was, which made a significant difference. The body length of the 24222 is only 12" long and looking thru it you'd swear it wouldn't make a difference...but it does.
https://www.dynomax.com/mufflers/rac...ullet-mufflers |
The Following User Says Thank You to hgerhardt For This Useful Post: | ||
#5
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Quote:
BTW, I don't want to give the impression to anyone that my wagon is loud. I'd say it has a very nice sound while cruising. My neighbor has a C7 Z06 Vette and I'd say my wagon has about the same sound level at idle as his car. The problem is my hearing sucks (product of loud everything as a teenager). I can't hear anything clearly when there is too much background noise, so I have to keep exhaust sound low.
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68 Firebird Convertible 68 GTO Clone (Tempest) Wagon |
#6
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I have Gardner resonators downstream of the same mufflers as you on my GTO and its very quiet.
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