Sound Deadening

[xs29bb1]

I've got an R/T with a stock exhaust. Is sound deadening something that I should put in?  How much does it really help (I would only be putting it on the floor - not in the roof or the doors)

I was thinking with my exhaust not being over the top, I might not need it at all. What do you guys think?

[cudaken]

I've got an R/T with a stock exhaust. Is sound deadening something that I should put in?  How much does it really help (I would only be putting it on the floor - not in the roof or the doors)

I was thinking with my exhaust not being over the top, I might not need it at all. What do you guys think?

More important, what do you think? 

[xs29bb1]

If people typically find that the road noise becomes irritating after a while w/o it and even with a stock exhaust it's generally louder than they'd like and the deadening material makes a big difference, then I'd strongly consider putting it in

On the other hand, if people generally only put it in if they have a louder after market exhaust, or the deadening material doesn't actually make a heckuva lot of difference, then I'll probably just pass.

[Mopar Nut]

I would use something more for the heat than anything. That exhaust sounds good but it generates heat.

[Homerr]

Does, or will, your car have undercoating?

If it doesn't I'd definitely put some soundmat in.

When I get to building my car it will have undercoating and soundmat inside.

[xs29bb1]

I do have undercoating - and wow, the heat from the exhaust is enough to really be a concern?   

[Troy]

I do have undercoating - and wow, the heat from the exhaust is enough to really be a concern?   

When I was in high school I had a 68 Charger with a 318 and headers. It was black outside with a black vinyl interior and no A/C. I made it through three Ohio winters in that car with no heat! The summer was generally miserable though. Luckily the whole side of the car opens with the windows down and the dash vents work fairly well so, even if you're roasting, there's a decent amount of air flow to dry out the sweat.

My most recent 68 R/T with a 440 and stockish exhaust and floor covering was a little better - probably because it didn't have headers. My 70 Challenger with a 440 Six Pack is awful in the summer as those cars don't flow nearly as much air with the windows down and vents open. All the cars I'm building from scratch will definitely have as much heat barrier as I can install!

Troy

[1974dodgecharger]

as everyone echoed yes I would be more worried about the heat given off I put two layers of sound sound deadenging in my  car and it has helped out rtemendously.  My fee dont sweat as much anymore.

[xs29bb1]

Hey guys - thanks a bunch for taking the time. Much appreciated. 

I've got AC, but triple black in CA probably means I need to do something... Thanks again.

[Kern Dog]

In 2011 I made my first long distance road trip in my 70 Charger. 1000 miles round trip in 3 days. Prior to that I only drove the car around town.
Driving for hours on end listening to ROAD noise, EXHAUST noise and WIND noise was a pisser. After getting back home, I looked at what I could do to quiet the car down. I added frame connectors and torque boxes. That made the car soak up the bumps much better and rattle less. In 2012 I pulled the interior and added "Hushmat" sound deadener on the floors, inside the doors and quarters and up the firewall. It helped but I still have more to do.
I'm looking into swapping out my Flowmaster mufflers for Dynomax Welded Ultra Flow mufflers. The Dynomax's are supposed to flow better and be quieter. I call that a win/win.
There isn't much that can be done about some of the wind noise. The drip rails, windshield wipers, door handles, recessed grille and other things create turbulence as the wind passes by. Look at how smoothe new cars look. Flush bumpers, recessed drip rails/rain gutters, tighter body gaps, decals instead of emblems all add up to less wind noise.

[Homerr]

In 2011 I made my first long distance road trip in my 70 Charger. 1000 miles round trip in 3 days. Prior to that I only drove the car around town.
Driving for hours on end listening to ROAD noise, EXHAUST noise and WIND noise was a pisser. After getting back home, I looked at what I could do to quiet the car down. I added frame connectors and torque boxes. That made the car soak up the bumps much better and rattle less. In 2012 I pulled the interior and added "Hushmat" sound deadener on the floors, inside the doors and quarters and up the firewall. It helped but I still have more to do.
I'm looking into swapping out my Flowmaster mufflers for Dynomax Welded Ultra Flow mufflers. The Dynomax's are supposed to flow better and be quieter. I call that a win/win.
There isn't much that can be done about some of the wind noise. The drip rails, windshield wipers, door handles, recessed grille and other things create turbulence as the wind passes by. Look at how smoothe new cars look. Flush bumpers, recessed drip rails/rain gutters, tighter body gaps, decals instead of emblems all add up to less wind noise.

Thanks for posting this real world experience!   

[lexxman]

I will be putting my 69 together this spring. What kind works best and doesn't cost an arm and a leg? And I was planning on useing a truck spay on  bedliner Under the car,should a worry about the heat?

[Kern Dog]

"Lizard Skin" is a spray on type coating that is supposed to be effective. It does cost more than the "peel and stick" stuff like Dynamat, Hushmat, Fat Mat, etc.