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Old 10-04-2018, 07:58 AM   #131
cruizin01
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Join Date: Mar 2016
Location: Cbus, Ohio
Posts: 290
Re: '78 K20 to C10. Almost 20 years in the making.

After driving the truck around for a bit I decided I had to do something with the exhaust drone. Around 1600-1900 its just obnoxious. The 3" is obviously way too big for my engine combo but Im trying to work with what I've got.

I decided to leave the 50 series flowmasters and install some Vibrant Ultra Quiet resonators after the axle. I also wanted to move the tailpipes closer to the rear bumper as I've read that helps noise as well.

You can see in this first pic how I was able to move the tips out further. The nearest tip is before adding the resonator.





These resonators only come in stainless so it was a struggle for me to weld them. I didn't have the correct wire to weld but read you could get by with whatever the standard is. The struggle I think came down to how thin the stainless resonators were. It melted quick! I also had to fill a bit because the original exhaust pipe wasn't completely round because of how it was bent so there was small gaps between the two pipes. I got it done but Im not pleased with the results of the welds.

It was late when I finished so I didn't get to drive the truck but the initial start up and idle is a significant improvement. My wife said, "well the house didn't shake when you started it up"

If this doesn't knock the sound down to my liking Im not exactly sure what Ill do.. Maybe weld some J-pipes in the front pipes or something...
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'78 C10 Build
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