Hissses
Enthusiast
Here is an update on the Heat problem talked about earlier, There is now a kit available and as a bonus it reduces interior noise. Here is a copy of the E-Mail I recieved.
Original Message -----
From: Timothy Cox
To: qwk351@cox.net ; Timothy Cox ; dpka@speakeasy.net
Sent: Friday, September 19, 2003 8:05 AM
Subject: Viper Project
Hi Michael
Here is the latest on the Viper project. We have completely outfitted the interior of the car and got an immediate 7-8 db reduction in noise. We were not able to make up the HVAC insulation kit to fit around the a/c plenum box as the customer needed the car for a rally. I am trying to reconnect with the owner of the car to set up a time to make HVAC kit.
Background:
While all Vipers came from the same factory, this car may not be the best test case for taking pre and post measurements. This Viper started off as a standard 1997 GTS and the owner has added headers, a Corsa exhaust, an after-market fuel injection system and a nitrous oxide system. It now has 650 plus horsepower and runs so hot that the paint on the exhaust covers under the doors is scorched. The ceramic insulation pads inside the exhaust covers has nearly burned through both the aluminum shielding as well as the ceramic insulation itself. I am guessing that the temperature in the catalytic converts is nearly 1000 degrees—my digital thermometer tops out at 525 degrees.
I have a suspicion that a “garden variety” Viper GTS would record greater db reductions if the insulation did not have to “compete” with all the race gear under the hood. Once the HVAC part of the project, we will re-test the impact of the changes on the interior temperatures.
Materials Used:
AcoustiSHIELD uses a two-stage dampening and insulation system modeled after acoustic technology currently used in Ford, GM and Chrysler luxury cars.
Dynamat—a self adhesive rubber asphalt material that stops vibrations in metal or composite body panels. Damper pads are placed on panels that produce a “ringing” sound.
Heat Shield—a two stag barrier material consisting of a fibertech material with double laver of pure aluminum bonded to one side. Heat shield reflects 97 percent of radiated heat, has a high dampening factor which expands the effect of the damper material and has a thermal rating of R-18.3 which is equal to six inches of house insulation.
Here is what we did: We completely stripped the interior out of the car to determine what the factory had done to insulate the vehicle. Here is what we found:
Floor Pan: The insulation consists of a 3/4 inch thick multi-barrier material that is bonded to the pre-shaped carpet "canoes" which slide into the car’s driver and passenger floor well. The factory insulation has an aluminum barrier that is facing the metal pans that make up the seat wells. The carpet canoes are sporadically sprayed with adhesive to keep the carpet canoes in place. There was no insulation on the set back section of the carpet. When the aluminum side of the insulation barrier is placed next to a metal body panel, it becomes a single piece of metal known as a “bi-metal” sandwich—with no air gap barrier. We left the factory insulation bonded to the carpet and installed a sequence of Dynamat damper pads where no factory damper material was installed and we constructed pre-cut heat shield barrier insulation panels to create the “air-gap” that was missing. Both the damper pads and the heat shield material was bonded to the floor and transmission side wall, the toe boards and the seat back. The factory carpet/insulation canoe was reinstalled.
Trunk Well: The factory insulation in the trunk well consisted of standard type 1/4 inch carpet pad material which was bonded to the back of the pre-shaped (and poorly fitting) trunk well carpet. The insulation covered about 50 per cent of the trunk well area at best. There was no factory dampening material found in the trunk area. We left the factory insulation bonded to the carpet and installed a sequence of Dynamat damper pads. We constructed pre-cut heat shield barrier insulation panels to create the “air-gap” that was missing. Both the damper pads and the heat shield material was bonded to the trunk well walls, floor and gas tank cover assembly. The factory carpet/insulation was reinstalled.
Roof: Factory insulation in the roof area consisted of small piece of 1/4 inch carpet pad material which was bonded to the pre-formed roof headliner. We left the factory roof insulation bonded to the headliner and installed a sequence of Dynamat damper pads on the roof body panels. We constructed pre-cut heat shield barrier insulation panels to create the “air-gap” that was missing. Both the damper pads and the heat shield material was bonded to the roof body panel. The factory headliner/insulation was reinstalled.
HVAC System: The Viper heating, ventilation and air conditioning system consists of a square un-insulated plenum box located about two inches from the exhaust manifold. The heat radiation from the exhaust manifold, the engine compartment and external air radiates directly on to the firewall of the car and the HVAC plenum box. We found that the temperature of the plenum box measured 163 to 176 degrees after about two minutes engine time. Air is drawn from the interior of the car above the passenger foot well as well as from an air scoop in the hood. Because the temperature of the plenum box structure is hot—the air passing through it is super-heated. We recorded a steady temperatures of ambient air in the 125-130 degree range coming through the passenger air vent. Running the refrigeration pump reduces the air temperature about 20 degrees when the system is fully charged and operating. We are testing several thermal barrier materials that we will use to insulate the HVAC plenum from the engine compartment so that the walls of the plenum box do not absorb engine heat. We are also experimenting with closing off the hood scope air inlet so that the HVAC system only pulls air from the interior of the car. If this engineering give us the results we anticipate, we will produce the HVAC Kit listed below.
Acoustishield Kits
I have constructed four AcoustiSHEILD Insulation and sound damping kits for the viper as listed below. Each kit includes Dynamat damper pads to take the "vibration ring" out of the body panels and Quality Heat Shield panels to insulate all of the interior panels.
VIPER 9702GTS-FC 1997-02 Viper Floor Insulation Kit $199
VIPER 9702GTS-RC 1997-02 Viper Roof Insulation Kit $119
VIPER 9702GTS-TC 1997-02 Viper Trunk Insulation Kit $169
VIPER 9702GTS-A/C 1997-02 Viper HVAC Insulation Kit $159*
VIPER 9702GTS-CAK 199702 Viper AcoustiSHIELD Kit $619
*In production.
Attached are photos we took of the Viper to document the process.
Tim
http://www.quietride.com
For more information you can contact:
Timothy Cox
Quiet Ride Solutions
Phone: 209-477-4840
Fax: 209-477-0918
Original Message -----
From: Timothy Cox
To: qwk351@cox.net ; Timothy Cox ; dpka@speakeasy.net
Sent: Friday, September 19, 2003 8:05 AM
Subject: Viper Project
Hi Michael
Here is the latest on the Viper project. We have completely outfitted the interior of the car and got an immediate 7-8 db reduction in noise. We were not able to make up the HVAC insulation kit to fit around the a/c plenum box as the customer needed the car for a rally. I am trying to reconnect with the owner of the car to set up a time to make HVAC kit.
Background:
While all Vipers came from the same factory, this car may not be the best test case for taking pre and post measurements. This Viper started off as a standard 1997 GTS and the owner has added headers, a Corsa exhaust, an after-market fuel injection system and a nitrous oxide system. It now has 650 plus horsepower and runs so hot that the paint on the exhaust covers under the doors is scorched. The ceramic insulation pads inside the exhaust covers has nearly burned through both the aluminum shielding as well as the ceramic insulation itself. I am guessing that the temperature in the catalytic converts is nearly 1000 degrees—my digital thermometer tops out at 525 degrees.
I have a suspicion that a “garden variety” Viper GTS would record greater db reductions if the insulation did not have to “compete” with all the race gear under the hood. Once the HVAC part of the project, we will re-test the impact of the changes on the interior temperatures.
Materials Used:
AcoustiSHIELD uses a two-stage dampening and insulation system modeled after acoustic technology currently used in Ford, GM and Chrysler luxury cars.
Dynamat—a self adhesive rubber asphalt material that stops vibrations in metal or composite body panels. Damper pads are placed on panels that produce a “ringing” sound.
Heat Shield—a two stag barrier material consisting of a fibertech material with double laver of pure aluminum bonded to one side. Heat shield reflects 97 percent of radiated heat, has a high dampening factor which expands the effect of the damper material and has a thermal rating of R-18.3 which is equal to six inches of house insulation.
Here is what we did: We completely stripped the interior out of the car to determine what the factory had done to insulate the vehicle. Here is what we found:
Floor Pan: The insulation consists of a 3/4 inch thick multi-barrier material that is bonded to the pre-shaped carpet "canoes" which slide into the car’s driver and passenger floor well. The factory insulation has an aluminum barrier that is facing the metal pans that make up the seat wells. The carpet canoes are sporadically sprayed with adhesive to keep the carpet canoes in place. There was no insulation on the set back section of the carpet. When the aluminum side of the insulation barrier is placed next to a metal body panel, it becomes a single piece of metal known as a “bi-metal” sandwich—with no air gap barrier. We left the factory insulation bonded to the carpet and installed a sequence of Dynamat damper pads where no factory damper material was installed and we constructed pre-cut heat shield barrier insulation panels to create the “air-gap” that was missing. Both the damper pads and the heat shield material was bonded to the floor and transmission side wall, the toe boards and the seat back. The factory carpet/insulation canoe was reinstalled.
Trunk Well: The factory insulation in the trunk well consisted of standard type 1/4 inch carpet pad material which was bonded to the back of the pre-shaped (and poorly fitting) trunk well carpet. The insulation covered about 50 per cent of the trunk well area at best. There was no factory dampening material found in the trunk area. We left the factory insulation bonded to the carpet and installed a sequence of Dynamat damper pads. We constructed pre-cut heat shield barrier insulation panels to create the “air-gap” that was missing. Both the damper pads and the heat shield material was bonded to the trunk well walls, floor and gas tank cover assembly. The factory carpet/insulation was reinstalled.
Roof: Factory insulation in the roof area consisted of small piece of 1/4 inch carpet pad material which was bonded to the pre-formed roof headliner. We left the factory roof insulation bonded to the headliner and installed a sequence of Dynamat damper pads on the roof body panels. We constructed pre-cut heat shield barrier insulation panels to create the “air-gap” that was missing. Both the damper pads and the heat shield material was bonded to the roof body panel. The factory headliner/insulation was reinstalled.
HVAC System: The Viper heating, ventilation and air conditioning system consists of a square un-insulated plenum box located about two inches from the exhaust manifold. The heat radiation from the exhaust manifold, the engine compartment and external air radiates directly on to the firewall of the car and the HVAC plenum box. We found that the temperature of the plenum box measured 163 to 176 degrees after about two minutes engine time. Air is drawn from the interior of the car above the passenger foot well as well as from an air scoop in the hood. Because the temperature of the plenum box structure is hot—the air passing through it is super-heated. We recorded a steady temperatures of ambient air in the 125-130 degree range coming through the passenger air vent. Running the refrigeration pump reduces the air temperature about 20 degrees when the system is fully charged and operating. We are testing several thermal barrier materials that we will use to insulate the HVAC plenum from the engine compartment so that the walls of the plenum box do not absorb engine heat. We are also experimenting with closing off the hood scope air inlet so that the HVAC system only pulls air from the interior of the car. If this engineering give us the results we anticipate, we will produce the HVAC Kit listed below.
Acoustishield Kits
I have constructed four AcoustiSHEILD Insulation and sound damping kits for the viper as listed below. Each kit includes Dynamat damper pads to take the "vibration ring" out of the body panels and Quality Heat Shield panels to insulate all of the interior panels.
VIPER 9702GTS-FC 1997-02 Viper Floor Insulation Kit $199
VIPER 9702GTS-RC 1997-02 Viper Roof Insulation Kit $119
VIPER 9702GTS-TC 1997-02 Viper Trunk Insulation Kit $169
VIPER 9702GTS-A/C 1997-02 Viper HVAC Insulation Kit $159*
VIPER 9702GTS-CAK 199702 Viper AcoustiSHIELD Kit $619
*In production.
Attached are photos we took of the Viper to document the process.
Tim
http://www.quietride.com
For more information you can contact:
Timothy Cox
Quiet Ride Solutions
Phone: 209-477-4840
Fax: 209-477-0918
will get them back later today.
I understand that the template car is raced alot and has alot of mods on it. This is the first time I have seen this on a car although there have been alot of posts. 
