finished up my sun/mon project with trying to get the interior road noise/vibrations down. Used 200st ft of edesigns sound deadening, 2gal of liquid deadening, and 15sq ft of jute. WOW.. I can actually have a conversation in the car at hwy speeds now. My nismo exhaust use to ring through the cabin,, now its about as quiet as the OEM catback. I used the mat throughout the whole floor, cubby holes, speaker holes, doors, door panels, interior panels, and rear spare tire area- I got about 2-3 layers consistently.Apply the 2gal of liquid over all that, and in the harder to get areas(inner fenderwell), then cut the jute to size and stick it to the liquid sound deadener... worked like a charm. strongly suggest doin this if you want to quite the inside cabin!

 

Sounds good man. What was the weight of all of that though? :P

 

Ya, i was thinking the same thing about the weight. Honestly if it a good amount a weight it could hurt your mpg but i dont think it would be that heavy to do that :/ i hope.

 

How are the G35s damped

 

^^ Sound deadening in the G35/37 is similar to the great job bmxpert57 did in his car, except to a lesser degree.

The G35’s sound deadening is mostly on the firewall, front wheels wells and floor. The G’s rear wheel wells are in the trunk and not inside the car (as they are in the 350Z coupe) so it’s not as necessary to add much deadening this area. The G35’s interior is “more plush” (less rigid and heavier door panels that resist vibration and transferring noise, thicker seats, and other panels that absorb sound) so you don’t need the extra deadening required to “quiet-down” the Z.

Reading his installation description, my guess is that bmxpert57 added about 150 lbs. (maybe less) to his car. If you are not tracking your car, that’s an insignificant addition.

The great feature of bmxpert57’s project is using liquid deadening and jute since this has almost no weight, but seals against the open holes and interior gaps in the Z that allow sound entry.

--Spike

 

 

^^ I agree.

I move that: “From here on all threads that describe extensive installation of sound deadening must include pictures that show the project as well as giving the weight of said sound deadening.”

Will someone second my motion? (A motion with no second is not passed.)

--Spike

 

Second.

 

^^ Thank you!

--Spike

 

ill try and snap a few pics of the rear because I can pull the padding up. But sorry LOL the carpet is all back and installed so it just looks stock now. I was in a hurry to get the car back together i didnt even think about taking pics in the process. BTW, it added about ~110lbs. BUT I took out the jack and spare tire..So I think im almost back to where I started! Even if it added a few more LBS im fine, because this is a DD and I need it quiet. Also in addition to sound deadening the door, i flipped the door panels upsidedown, coated the F* out of it with the liquid and then the jute stuck right to it!
heres what I used;
http://cgi.ebay.com/ebaymotors/ws/eB...K%3AMEWNX%3AIT
http://cgi.ebay.com/ebaymotors/ws/eB...K%3AMEWNX%3AIT

 

^^ Don’t worry much about doing pictures. TreeFiddyZee and I are just messing with you.

For sure don’t bother pulling up anything and taking pictures just to satisfy a couple of renegade posters.

It’s obvious your project turned out much better than a couple of other guys here who report adding 200+ lbs. to the car with less than optimal results. I suspect that is because you took it farther than just gluing down sound deadening mats.

Nice project... and thanks for the report.

--Spike

 

But Spike! We voted. Parliamentary procedure you know.

 

^^ We’ve already covered that. TreeFiddyZee and I have passed a resolution requiring pictures when posting this type of project.

bmxpert57’s thread is exempt because he posted before the Resolution. And, we don’t want him pulling his project apart just to take some pics.

BTW: The “antique picture” post is getting old and overused. If you keep posting those old pictures, I’m going to retaliate by posting pictures of my snow tire/wheel setup yet another time!

Of course, just kidding… I appreciate the humor.

--Spike

 

can anyone tell me critical parts to cover on the Z to reduce some road noise???

I have some unused raamat available and would like to use it up.

 

Yes, what are the most critical/benefiical areas to cover or reinforce?

 

OK… two people asking about the same question deserve an answer. I’ll start it out, and hopefully that will gain more replies.

Assuming we are talking about a Z coupe (that sounds like a tin can without deadening), the first area I would deaden is the rear cargo space (to include the floor, rear wheel wells, and pedestal behind the driver and passenger seat).

My second focus would be the front doors, and I would jump that to #1 if I installed aftermarket speakers in the front doors since that is a mandatory requirement when installing speakers if you want decent sound.

The final area is the front of the car (to include the floor, front wheel wells, and firewall).

Hopefully my message will stimulate more replies.

--Spike

 

Definately worth the weight, especially when over 500whp

 

^^ Nice… Wow… just a terrific job (it looks so neat and has deadening exactly where it needs to be for a solution). Great pics BTW.

Keep’m coming (I was tempted for a misspelling here, but successfully resisted… )

--Spike

 

i thought it wasnt necessary to cover the entire area...just enough to stop the vibration (noise wavelengths)

 

Sound deadening materials reduce vibration on the surfaces they attach to. If you deaden a piece of sheetmetal that sits next to another piece of sheetmetal that you do not deaden, it's almost as though you didn't deaden anything at all.

--Spike