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That was the request from the wife, so I'm trying to make my '81 quieter. I started with new mufflers- the old ones were completely shot. Now I'm working on the interior to reduce the road noise.
I installed a Hushmat "trunk kit under the factor sound mats. There was enough material to cover the floor from the battery box on back, then up the vertical rear panel and halfway up to the steel plate above that. Then the wheel wells. Leftover pieces went on the vertical sides below the wheel wells and the slanted panels behind the seat. Then I used some hardware store material over the slanted panels.
The speaker kits are still drying- not yet re-installed.
When I took out the factory mats I soaked them with Simple Green, rinsed them and dried them in the sun. The sides are barely intact and I stipped off the plastic film, put them back and used about a mile of duct tape to reinforce them.
should be a big difference!
i used some alum foil to fix my old insulation in front.
i would also consider running the lowest tire pressure listed on door.. 30psi for an 81? i run like 24 front and 28 rear..and big difference in harshness.. not sure where you are at now.. over 2 tons here!
Last edited by interpon; Apr 29, 2021 at 10:46 AM.
Used Frost King on a '67 GTO restoration about 10 years ago. Was $21 for enough to do the whole car....used a tire patch wheel to get the corners and a roller to stick it down elsewhere. Did the roof under the headliner and the inside of the doors as well. Really made the car quiet and tight.....much better than factory. Dyna-mat would have cost about $800-$1000 to do the same job.
Used Frost King on a '67 GTO restoration about 10 years ago. Was $21 for enough to do the whole car....used a tire patch wheel to get the corners and a roller to stick it down elsewhere. Did the roof under the headliner and the inside of the doors as well. Really made the car quiet and tight.....much better than factory. Dyna-mat would have cost about $800-$1000 to do the same job.
I've used similar stuff in the past with good results, with the exception of overhead or vertical applications because it didn't stick as well as Dynamat. The material for this job is HushMat, about 1/2 the cost.
Results are in. I added a 1/2" dense foam on top of the OE cardboard. Then I added a layer of some hardware stuff under the driver's seat, where there was nothing. Now the only road noise I hear is from the front.
I'd grade this job as a B-, maybe a C. Better than the F that I was working with.
Waiting on new speakers. The original ones were in the back and one was chewed up by a mouse. Thankfully he had been a short term resident. In the front, the right was original, completely dry rotted, and the left was a POS from radio shack.
Have your wife take a ride in mine, she will never complain again!
Yup! Sidepipes and earplugs. Windows down, T-Tops off.
I used Hushmat and Reflectrix in my wife's tame 79 auto. It helped, a lot, but she's an actual car enthusiast. The car has true-duals (with cats), and isn't very loud.
Yup! Sidepipes and earplugs. Windows down, T-Tops off.
I used Hushmat and Reflectrix in my wife's tame 79 auto. It helped, a lot, but she's an actual car enthusiast. The car has true-duals (with cats), and isn't very loud.
Mine had a single cat and a Y-to-Y pipe. I killed the cat, now it has an X pipe.
Make it quiet, please
Crank up the tunes
