Exhaust advice
Race Director
Joined: Jul 2005
Posts: 12,064
Likes: 3,601
From: Central MO
It's most likely you will not get acceptable relief by adding a "silencer" type of muffler or resonator. I tried it on my Avalanche and while it helped a little, I ultimately got rid of the cat-back and went back to stock. Granted, the muffler that was on it was a Hooker Max-Flo, which is a straight-through design but I did tons of research and it was NOT supposed to drone. It gave me a headache if I was on the highway for more than an hour. It droned horribly from about 1600-2200 rpm; once I got above 80 mph it quieted down but traffic was usually too heavy to run that fast for any amount of time. The same setup I had in a friend's stock Avalanche (CAI only) sounded great, with no drone. The guy I sold my setup to, also with a stock truck, loves it and again it has absolutely no drone.
The Avalanche has a CAI, is Magnacharged (pullied down), cammed, stalled, and has 4.10's. The difference was obviously the additional mods on my truck that created additional intake and exhaust flow way beyond stock. I've debated adding exhaust cut-outs but just haven't decided to pull the trigger yet.
The Avalanche has a CAI, is Magnacharged (pullied down), cammed, stalled, and has 4.10's. The difference was obviously the additional mods on my truck that created additional intake and exhaust flow way beyond stock. I've debated adding exhaust cut-outs but just haven't decided to pull the trigger yet.
Race Director
Joined: Oct 2005
Posts: 14,555
Likes: 1,255
From: Saint Albans, WV
It's most likely you will not get acceptable relief by adding a "silencer" type of muffler or resonator. I tried it on my Avalanche and while it helped a little, I ultimately got rid of the cat-back and went back to stock. Granted, the muffler that was on it was a Hooker Max-Flo, which is a straight-through design but I did tons of research and it was NOT supposed to drone. It gave me a headache if I was on the highway for more than an hour. It droned horribly from about 1600-2200 rpm; once I got above 80 mph it quieted down but traffic was usually too heavy to run that fast for any amount of time. The same setup I had in a friend's stock Avalanche (CAI only) sounded great, with no drone. The guy I sold my setup to, also with a stock truck, loves it and again it has absolutely no drone.
The Avalanche has a CAI, is Magnacharged (pullied down), cammed, stalled, and has 4.10's. The difference was obviously the additional mods on my truck that created additional intake and exhaust flow way beyond stock. I've debated adding exhaust cut-outs but just haven't decided to pull the trigger yet.
The Avalanche has a CAI, is Magnacharged (pullied down), cammed, stalled, and has 4.10's. The difference was obviously the additional mods on my truck that created additional intake and exhaust flow way beyond stock. I've debated adding exhaust cut-outs but just haven't decided to pull the trigger yet.
Thread Starter
Racer
Joined: Jul 2012
Posts: 341
Likes: 2
From: Elderslie, Scotland
Let the guys at C&C Hillington do their stuff.
90% of the drone is now gone and it sounds fantastic accelerating up the gears
What a difference, reckon no power loss. Need some dry weather now to test it properly
90% of the drone is now gone and it sounds fantastic accelerating up the gears
What a difference, reckon no power loss. Need some dry weather now to test it properly
Tech Contributor
Joined: Jul 2002
Posts: 14,950
Likes: 266
From: St. Louis, MO
St. Jude Donor '08
Looks like nice clean work and glad to know it can work!
Can you post up the brand and part number in case someone else has this issue and would like to follow in your footsteps?
Can you post up the brand and part number in case someone else has this issue and would like to follow in your footsteps?
