Mass backing or Poly backing?
#1
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Mass backing or Poly backing?
For ACC brand passenger and cargo area carpet, is the $100 mass backing option worth it over the standard poly backing? Not so concerned about sound deadening or insulation, but more about fit and finish.
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Car: 1 Owner 1986 TA with a WS6 package
Engine: 5.0 EFI
Transmission: THM700R4
Axle/Gears: 277 Posi Speedo
Re: Mass backing or Poly backing?
I went with the Mass Backing,but that's because that's what the car came with.
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Car: 83Z28 HO
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Re: Mass backing or Poly backing?
The mass backing makes it a pain to install, but once it's in it lays flat with no wrinkles. If you're concerned with fit and finish….Just my opinion.
#5
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Re: Mass backing or Poly backing?
I had the poly backing on the first carpet I bought…it bunched up and never laid flat. It was cheaper and I found out why right after the install.
The mass backing makes it a pain to install, but once it's in it lays flat with no wrinkles. If you're concerned with fit and finish….Just my opinion.
The mass backing makes it a pain to install, but once it's in it lays flat with no wrinkles. If you're concerned with fit and finish….Just my opinion.
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Car: 91 Trans am
Engine: built 360 TBI
Transmission: built 700r4
Axle/Gears: 10bolt/3.23
Re: Mass backing or Poly backing?
I have used both ACC carpets with mass backing and without, with the mass backing it weights a lot more than without.
If done on a warm day, let lay in the sun the time it takes to remove tho old carpet, both fit perfect. Finish is the same.
With the non mass backing carped I insulated the body with 2 layers of 4mm PE Bubble Aluminum Foil, honestly I prefer the sound in the vehicle better then in the car with the mass backing carpet.
The PE Bubble Aluminium Foil is ultra light, I also noticed that it isolates the heat from the catalytic converter and the transmission better then the Mass Backing.
If done on a warm day, let lay in the sun the time it takes to remove tho old carpet, both fit perfect. Finish is the same.
With the non mass backing carped I insulated the body with 2 layers of 4mm PE Bubble Aluminum Foil, honestly I prefer the sound in the vehicle better then in the car with the mass backing carpet.
The PE Bubble Aluminium Foil is ultra light, I also noticed that it isolates the heat from the catalytic converter and the transmission better then the Mass Backing.
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#8
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Thread Starter
Re: Mass backing or Poly backing?
I have used both ACC carpets with mass backing and without, with the mass backing it weights a lot more than without.
If done on a warm day, let lay in the sun the time it takes to remove tho old carpet, both fit perfect. Finish is the same.
With the non mass backing carped I insulated the body with 2 layers of 4mm PE Bubble Aluminum Foil, honestly I prefer the sound in the vehicle better then in the car with the mass backing carpet.
The PE Bubble Aluminium Foil is ultra light, I also noticed that it isolates the heat from the catalytic converter and the transmission better then the Mass Backing.
If done on a warm day, let lay in the sun the time it takes to remove tho old carpet, both fit perfect. Finish is the same.
With the non mass backing carped I insulated the body with 2 layers of 4mm PE Bubble Aluminum Foil, honestly I prefer the sound in the vehicle better then in the car with the mass backing carpet.
The PE Bubble Aluminium Foil is ultra light, I also noticed that it isolates the heat from the catalytic converter and the transmission better then the Mass Backing.
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Car: 91 Trans am
Engine: built 360 TBI
Transmission: built 700r4
Axle/Gears: 10bolt/3.23
Re: Mass backing or Poly backing?
The PE boubble foil I used, not sure it is actually called that way but it is basically a foil of aluminium glued to a sheet of Polystyrene foam.
To install the Aluminium/Polystyrene isolation, I used some double sided tape (used for fixing carpets to the floor), it is not necessary to cover the whole body with it.
Between the layer of isolation and the "standard" carpet, nothing.
The mass backing is a layer of around 4 mm Linoleum type material added on the back of the "standard" carpet.
Impossible to tell the 2 appart optically and physically, if you do not know what is under it. However you can tell the difference if you bang for exemple the knee against it.
For the carpet material door inserts if you have any, you must use carpet without mass backing.
To install the Aluminium/Polystyrene isolation, I used some double sided tape (used for fixing carpets to the floor), it is not necessary to cover the whole body with it.
Between the layer of isolation and the "standard" carpet, nothing.
The mass backing is a layer of around 4 mm Linoleum type material added on the back of the "standard" carpet.
Impossible to tell the 2 appart optically and physically, if you do not know what is under it. However you can tell the difference if you bang for exemple the knee against it.
For the carpet material door inserts if you have any, you must use carpet without mass backing.
Last edited by thomas1976; 05-04-2014 at 01:35 PM.
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