BRZ limited has factory installed sound proofing
 

For All Who Are Looking To Add Sound Proofing To Your BRZ. Here Is What I Found So Far In The BRZ.

doors: From The Factory, there Are Two Pieces Of CLD On The Outer Door Skin. One By The Speaker, The Other By The Door Handle. Each piece Is About 6X6 Inches. (I Added Two 12X6 CLD Tiles Above The Crash Bar And One 6X6 Tile By The Speaker.) There Is Nothing On The Inner Door Skin. The Inner Door Skin Has A Lot Of Metal Folds In It Does not Resonate Much.(I Did Not Add Anything To It). TheTrim Panel Has Nothing On It. (i Added a Layer Of MLV, A Layer Of 3M Thinsulate Acoustic 1/4 Inch Thick. And Filled The Spaces In The Door Trim With Thinsulate.)

Front Seat Foot Wells: There Is What Looks To Be Sound And Heat Insulation Here. Closed Cell Foam, 1/8 inch MLV?, styrofoam, And Jute. As We All Know, There is Room For Improvement Here. (I Added A Layer Of MLV From As High on The Heat Shield As I Could Get All The Way To The Front Mounting Point Of The Front seats. The Same Layer Went Up The Sides Of The Footwell From The Center Counsel Trim To The Door Sill.)

I Put A 39 inch By 19 Inch Piece Of MLV into The Back Seat. Added A Later Of Thinsulate Here As well. Overall, Not Bad. I Got A 6 dB Reduction In Noise At Peak 75 hZ At head Level Drivers Seat.This Is Driving At 70 Mph On Asphalt . Next I Plan To Add 30% Coverage CLD to The Trunk, Followed By MLV and thinsulate To The Rear Seat Bottoms.

Thanks! you got any pictures?

People are trying to make their BRZ quietER?!?:bellyroll:

The car is already way too quiet for a sports car:slap:

No Pictures, Sorry. I Was Rushing Through it. I Can Take Some When I Do The Trunk And Rear Seat Bottoms.

wHAT iS wITH aLL tHE cAPS?

Just Trying To Share Some Info. Your Goals May Vary From Mine. For Me, This Is A Daily Driver. I Have A 100 Miles Per Day Of Commuting To Do And Lot Of That Time, I Am On The Phone With Clients.

Sorry About That, My Phone Does That On This Forum.

Theres two panels of that black tar crap in the footwells. One just in front of the seat and one just behind it. There's one on each side of the trans tunnel and on top of it. There's some half inch thick rubber backed foam that covers the whole trans tunnel. Theres a half inch thick firewall blanket too. Couple pounds of seam sealer under all that.

Very observant!:party0030:

Is That Really Tar? I Thought It May Be Vinyl. Either Way, No Need For CLD there.

then you should be driving a mercedes or lexus instead. Sorry you bought the wrong car.

I don't get this type of comment. Anyone can buy any car to do whatever pleases them with it. It's their money. He didn't buy the wrong car. He bought the car he wanted and is doing with it whatever it is he likes. No need for belittling comments.

Is it wrong to buy a car you love and use it as a daily + work?

OP is not complaining about the noise in the car; he's just sharing some useful information which may or may not benefit you and the community.

Smells like it when it's on fire :lol:

No pics no care :iono:

<3

I Will Pull Up The Carpet Tomorrow And Post Up Some Pics. if I Get Time To Do Seats Or Trunk, I Will Post Those Too.

Yeah, please take pics for the next phase of your mod. :thanks:

Literally my first thought. I got the car and immediately was like, "Hey, this needs some loud pipes."

He probably owns a manual...so he enjoys using the SHIFT key... ;)

I Sure Do.

Update: I finished The Back Seat And Trunk. Took Pics. Also Pulled Up The Front Carpet And Took Pics. As A Bonus, I Pulled The Door Panels Off And Took Pics. Will Write It All Up And Post Either Tonight Or Tomorrow. Any One Interested In How Much Material I Used?

By popular demand, here are the pics

http://www.flickr.com/photos/8619486...7633425405068/

note: I did not take pics of the MLV and thinsulate install into the foldable back seat. Those clips pull straight up. and the rest is straight forward.

cheers.

oh man that tennis ball trick is great

You're confusing pleasing engine and exhaust noise with obnoxious road noise.

You should consider doing the rear quarter panels. Doors and rear quarter panels are probably the critical spots for road noise; I believe the trunk will reduce exhaust noise (I've done mine because my aftermarket exhaust was slightly too loud for normal driving for me).

Plugging the 'noise tube' will also result in a much quieter cabin (quieter meaning less exhaust noise, not less road noise). I made a plug out of some solid PVC tubing. When I want a quiet ride I just loosen the hose clamp on the noise tube, insert the plug, and tighten the clamp. It's especially good for long rides when you would rather hear the radio than the exhaust rumbling.

Need pictures :bonk:

If you were referring to the plug...
http://cdn.shopify.com/s/files/1/019...x1024.png?1312
not my picture, but this is one way of doing it. I leave the sound tube attached even with the plug in just because the engine bay looks more complete to me that way.

I think my Injen does that automatically. The one in the engine bay where the stock intake feeds the tube into a random thing right?

edit: yeah that's the one

I prefer the already included road noise cancellation unit. The radio.... Although road noise can be it own warning system.

Would You Do The Quarter Panels From Inside The Car Cabin Our From The Trunk Area?

Heres a photo for anyone interested. The trans tunnel foam is already removed.

http://i86.photobucket.com/albums/k1...psd9fcd9f2.jpg

ebgs500e: How much quieter is the BRZ during acceleration?
 

The steady state improvement you note during highway driving is impressive. However, I don't find the BRZ to be objectionably loud in this area of operation - though I wish it was quieter.

Where I find the BRZ too loud is during acceleration - even from just off idle though mid revs, at moderate rates during normal driving - I hear too much dB - lots of mechanical noise - coming through the body into the interior.

Do your modifications quiet the car down during acceleration - and if so - to what degree?

Thanks; this has been a valuable post for me.

The funny thing is that I like the way the car sounds under acceleration. After doing the sound proofing i can hear more of the engine and exhaust since overall noise is down. The overall volume is lower, but the car sounds are more distinct.

ebgs500e, your interior volumes are still lower, surely?
 

I doubt the engine sounds could be louder with the soundproofing installed, but rather seem to be higher in the "mix" (proportion) compared to the amount of road noise that has been removed.

Is this what you're saying?

good find i was just thinking about putting some dynamat in the car. the road noise interferes a lot at hight speeds (70mph).

This.

Thanks for new info. I appreciate, if anything drove me away from a car, it gotta be the road noise!