Right muffler for quiet ride?

[AWickman]

Hallo, I am new on this very interesting page. I have a 1983 Silverado with 6.2 and TH700. I have been driving the car daily since 15 years. Engine was rebuilt 3 years ago and the last year the car have been in small pieces - frame of restoration. I am now getting close and I am really looking forward to have the truck back on the road again. One thing I had as an aim was to have the cab quiet. I have insulated with Hush mats, new fire wall insulation, all rubber sealing new and new - what I thought - right type of muffler. But now when Im doing the first test rides I am disappointed. Still some kind of resonance - not a good sound level in the cab.
First I tried Walker muffler 18124, not good at all. Now I have Walker 17845 which I was told should be the right one for the 6.2. But no, not good. I can see that P/N 14063795 is GM part number. Anyone that have any idea how I can have a quiet ride?
Andreas Wickman, Gotland Sweden

[sctrailrider]

Build a resonator


https://www.performancetrucks.net/fo...-drone-489463/

[DmaxMaverick]

Welcome aboard!

A resonator is one option, but can be complicated, requiring repeated attempts. If you have dual exhaust, a crossover pipe (x-pipe, H-pipe, balance pipe, etc.) is much more simple, and often more effective for your V-8 Diesel.

[Robyn]

What Maverick said.....

The 6.2 with the dual pipes from the factory were very quiet.

Install a balance pipe between the two exhaust pipes ahead of the mufflers.

This will stop the "Rapping noise" and should stop the droning as well.

If you have large tail pipe tips (ENDS) THESE CAN CAUSE DRONE.

I installed a set of 5 inch chrome tips about 16" long on one of my trucks and it looked nice, but the drone was horrible.

The factory set up was the best as far as quiet.

[More Power]

What DmaxMaverick said about an H-pipe. Not only will it reduce the noise, it'll also allow the engine to produce more power. It's a big deal.

Generally, the larger the muffler the quieter it will be. A larger muffler more effectively cancels sound better for a diesel because of the engine's lower rpm nature. The quietest mufflers I've been around are those made by Banks - they're usually larger than most. I'd look for stainless steel exhaust system components if you live in areas where they use road de-icer during the winter months.

[AWickman]

Thank you a lot for the tip. I have seen those cross pipes and heard that they boost power, but not that they also helps against the drone. I have original pipes, one for the left bank and one for the right. 2.5 inch before the muffler. When I look for a good location for a H-pipe, it seems to be right behind the frames cross member. My truck is 2WD so there are quit good space just behind the transmission. Can I make it easy and just let the H-pipe joint be 90 degrees perpendicular attached? I have seen sophisticated cross systems more X-shaped, but that seems quite complicated to make. Will it be any different if I make the cross-pipe 2 inch instead of 2.5?

Once again. Happy I found this page!