Do i need dynamat?

[BuddyP]

In the process of my project I had the underside of the body undercoated with line-X bedliner spray. With that I don't see a reason to use dynamat on the floor. Would you guys agree? I will still use it on the roof and doors.

[Joker69Camaro]

I would still dynamat the entire floorboard. The line-x will help, but the dynamat will have more vibration control. It will also be a good start to a thermal layer. Just my $.02

Jeff K

[NightDiver]

I would still dynamat the entire floorboard. The line-x will help, but the dynamat will have more vibration control. It will also be a good start to a thermal layer. Just my $.02

Jeff K

I would agree... While any single layer is better than nothing, having a layer on both sides of the underbody will only help. Not only that, but dynamat will provide better thermal insulation which, anyone who has nearly melted the soles off their shoes during a long road trip can tell you, is more important than most people think...

[Joker69Camaro]

Exactly! Which is why I always recommend a layer of Dynaliner or equivilant over the dynamat also.

Jeff K.

[wmhjr]

Agreed. It doesn't cost all that much, and there is little downside.

[Tony_SS]

I would use it. I just bought a box and can't wait to get it in there, along with some thermal jute and then the factory carpet and jute... should be pretty quiet inside after that.

[Chad-1stGen]

Well there is one downside... weight

[NightDiver]

Well there is one downside... weight

more weight just means more reason to go for that bigger engine... horsepower and torque will cure everything... lol

[Chad-1stGen]

more weight just means more reason to go for that bigger engine... horsepower and torque will cure everything... lol

On the street yeah maybe. Anything performance related except maybe drag racing then nope.

EDIT: FYI I do have my entire floorboard, firewall, doors and quarters done but I'm not sure I would do it again. Never drove the car without the stuff so I can't say for sure, but I get so much wind noise through the windows that I don't know that it made much difference.

[Ron.in.SoCal]

^ I'm w you Chad on the weight thing. One box of Dyna wieghs what, 15 something lbs? This month's Super Chev had an article on Boom Mat. 9lbs total on a second gen. So hard to really compare one brand to the next wihtout having installed/driven on both, but it sounds like a winner to me...

[Tony_SS]

On the street yeah maybe. Anything performance related except maybe drag racing then nope.

EDIT: FYI I do have my entire floorboard, firewall, doors and quarters done but I'm not sure I would do it again. Never drove the car without the stuff so I can't say for sure, but I get so much wind noise through the windows that I don't know that it made much difference.

I've been driving mine with skimpy jute and carpet only, and it's noisy. I expect to notice a big difference.

15lbs isn't too bad really. It's low and centered weight. Not the worst.

[Hunter68]

would you guys recommend dynamat or the almost carpet looking stuff with the silver lining? and how do you say the roofing material holds up pretty much looks like the same thing and even cheaper than dynamat

[aps63]

Like most things in life, you get what you pay for.
Dynamat is more expensive but if it keeps out just alittle more heat and noise then it's worth it.
I've never used the roofing stuff but, I've heard horror stories about it being used.
Keep to the stuff that is made specifically for car interiors. The money will be well spent.

[GNon18s]

I think the whole Dynamat thing is over rated in most cases. I have used it in certain areas, but my car is noisy because the windows are down, the turbo is hissing, and it has 3" exhaust... not because I didnt put 25lbs of Dynamat under the carpet. Everybody thinks because they saw it in some other build thread that they have to do it too. Just my opinion.

[Vegas69]

These cars were engineered to be noisy. You can put a warehouse of dynamat in them and they won't come close to modern engineering. The heat protection is just as, or more important in my opinion. That comes from a jute with a foil backing. My floor stays nice and cool with 666hp on a hot desert day.

[shep]

If your worried about weight lizard skin would be the way to go.

[Jim Nilsen]

2nd Skin products are so much better and the range of products for specific use is way beyond Dynamat.

My car would buzz and be a lot hotter with out the Damplifier I installed. I have so many flat panels it was a neccessity.

You will never regret doing it.

[Ron.in.SoCal]

I've been driving mine with skimpy jute and carpet only, and it's noisy. I expect to notice a big difference.

15lbs isn't too bad really. It's low and centered weight. Not the worst.

Yeah, but you'll need four boxes or so...

[Tony_SS]

Yeah, but you'll need four boxes or so...

One box is 36 square feet... That should be enough for just the floor boards. That's where most the noise/heat is...

[Hunter68]

whats so bad about it? its essentially the same thing

Like most things in life, you get what you pay for.
Dynamat is more expensive but if it keeps out just alittle more heat and noise then it's worth it.
I've never used the roofing stuff but, I've heard horror stories about it being used.
Keep to the stuff that is made specifically for car interiors. The money will be well spent.