6 Cylinder Exhaust Recommendation

[Bill Taylor]

I bought a really clean 76 GMC C15 (250 6 cylinder, three in the tree) last year, and the only real issue with it was the exhaust system. Both the cat and the muffler were shot, so I eliminated the cat and ran 2.5" pipe from the take down pipe through a Summit Race muffler (2 chamber). I wasn't happy with the sound (loud) so I installed a Walker Tru-Fit muffler. That helped a lot (nice sound at idle) but it is still too raspy under load.

I know an inline 6 cylinder will not sound like a healthy V8, however, this setup makes an otherwise nice truck sound cheap. Before I waste any more money on mufflers, anyone have a thought here? Would adding a glasspack muffler act as a resonator? My current setup has the exhaust dumping in front of the rear wheel. I'm sure that is part of the problem, with the tailpipe kinda in my ear but I am looking for a simple (cheap) solution.

 

[Termite_Delight]

Add a tailpipe and dump it out the back. It will be quieter in the cab.

 

[Bill Taylor]

Thanks for that suggestion....I was not so much concerned about the noise in the cab as the overall quality of the exhaust sound. I just installed a Cherry Bomb muffler in the same spot that the cat conv used to sit, and that really did the trick. I now have the Cherry Bomb feeding into the Walker Tru-Fit muffler. Problem solved!

 

[DoubleDingo]

You did what I was going to suggest.

 

[78C10BigTen]

Thats a very interesting idea.... id like to hear how that sounds.

 

[Bill Taylor]

You did what I was going to suggest.

I knew that! That's why I did it.

 

[DoubleDingo]

Good one...