k_garretson23

iTrader: (8)

I bought a 12 bolt due to a lack of funds and getting agreat deal on it. Its a very solid rear but it has that 12 bolt howl i knew it would have. I know its just their nature and I can live with it, but just out of curiosity has anyone ever tried dynamatting their car to quiet it down a little or is it just unfightable? lol

slow ride 02

I would have the gear set-up (pattern) checked, I have never heard of the 12 bolt howl?

k_garretson23

iTrader: (8)

12 bolts howling with a torque arm setup on a 6 speed car is very common.

slow ride 02

You are right. Its too common these days! I not buying it.

MeentSS02

iTrader: (11)

Dynamat won't be enough...it might calm it down some, but I don't think it'd be enough to totally get rid of it. Dynamat is a vibration damper, not a sound proofing material.

LS1-IROC

iTrader: (4)

Dynamat does little to stop that noise. I had a noisy 10 bolt for awhile and tried dynamat. Hardly made a difference. I think the noise transmits into the body at too many points to try and contain it.

k_garretson23

iTrader: (8)

Mine isnt awful so a little bit would be make it fine. Any recommendations?

lcfdvette

Have you looked into Lizard Skin?

AINT SKEERED

iTrader: (2)

dyno mat did help a little bit but not very much. My gears are killing me with noise. I have been through 4 sets in my 12 bolt all set up to be quiet but as soon as I start abusing the car it starts the dreaded howl back. I drove it for 5 months last time with out running it hard and no noise. First night racing, drove home with a noise. It has gotten worse and worse .

1 FMF

iTrader: (1)

check out the stereo section on sound absorbers.
i just did my car but haven't driven it yet, there's stuff from raamaudio that's 1/8" thick foam called ensolite ps (peel&stick) that is supposed to be a good sound absorber. if you pull your carpet and put 2-3 layers of that under that "might" help and would be about the cheapest way to go for sound absorber (not vibration damping).

nitroheadz28

iTrader: (3)

Is the noise that loud for some of you guys? I've got a strange 12 bolt with 10k on it and I can hear it when I'm on power ever so lightly but not enough to bother me. (I'm OCD about noises too, the interior rattles drive me batshit crazy lol).

Macs98Z

iTrader: (16)

Have you driven the car hard? Guys with M6 usually end up having noise after they run the car hard, banging shifts and dumping the clutch.

k_garretson23

iTrader: (8)

never heard of it, details?
how much does it weigh? I want to try and keep the weight down as well.

slow ride 02

WTF! you mean to tell me that if you buy an aftermarket 12 bolt, that have to baby it, or you will get "the 12 bolt howl"? Something is wrong here

nitroheadz28

iTrader: (3)

I've only had the car for 3k miles but I've dumped it in dry twice and done a couple hard pulls, I guess I baby my stuff too much

Macs98Z

iTrader: (16)

It seems hit or miss with the 12 bolt--some have issues and some don't. The only time I hear of guys having issues is when they hit the track with some drag radials or slicks and do a few clutch dumps out of the hole. I have a 12 bolt waiting to go in, but it's not because it was my first choice...it's because it was cheap

I guess we'll find out if it was worth the gamble...

k_garretson23

iTrader: (8)

thats why i have mine lol

1981TA

iTrader: (7)

I've seen references to different grades of gears making the difference-something along the lines of cheaper gears (same mfg) being noisier than the higher grade, but just as strong. Could be BS, but it's a thought.

1 FMF

iTrader: (1)

the ensolite foam weighs nothing- it's 1/8" foam. i bought 5 orders of it, aroud 100 square feet, that weighed less than 10-15 pounds and half the weight was the wax paper you peel to expose the adhesive.

their vibration damping BXT mat however is I think one pound per square foot.