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Well I finally got the 350 rebuilt & installed in Bufford( a 1948 chevy pick up,chopped ,extended doors & caddy fins on a narrowed 94 Chevy trk bed). I have 2 1/2" pipes & Dynomax turbo mufflers. This combo makes the interior too noise to carry on a conversation..........what to do?
1. reduce the tail pipes to 2 1/4"
2. install resonators aft of the mufflers
3. replace w/quiter mufflers( I have no idea what would be quiter)
How well is your floor insulated?
What hangers are you hanging your pipes with? If too solid, the vibration makes it a lot louder.
Do the tailpipes go right out to the back?
The floor insulation is 1/2" thick thru out the cab. The carpet is also 1/2" thick. There is also dynamat thru out the cab.
The hangers were installed at the muffler shop & include a 2" rubber hanger.
i had those mufflers on a camaro i built and they were loud i have heard good things about flowmasters new 70 series mufflers it is the quietest one flowmaster makes.
Thanks for the advice.....does someone know of a link that test the DB's of turbo mufflers?