|TECH TIP||Technical Index|
Interior Upgrades Ė Tech Article #1
by Mike C. -
I donít know about you, but I am particularly bad about going overboard in the projects that I do. I particularly like to see how I can get the car built with some of the up-to-date techniques that the new car manufacturers use. These techniques include fit and finish, engine and drive-train power and smoothness, and the NVH thing you read about in Car and Driver magazines (noise, vibration, and harshness). I like the challenge of taking an old VW and making it rival some of the new cars of today in terms of NVH. There are a lot of VW owners want to keep the charm and magic of the different kinds of noises created by the air-cooled Beetles, Busses, and Ghias. However, there are some who may want to step up to the challenge of being able to hold a nice, quiet conversation in their old VW while going 65 mph down the interstate. In this article, Iíll show you how to turn your VW into a Lincoln in terms of applying sound deadening techniques.
Iím going to assume here that you are already in the process of restoring your VW or you are at least redoing the interior anyhow.
For the job, you will need:
The jute padding will be used in between sheets of the asphalt-based material. All of this sound deadening can be purchased through J.C. Whitney for a pretty reasonable price. Both types of material come in 48" x 72" rolls. Use the heat gun for softening the asphalt sheets so the sheets will easily conform to the irregularities in the sheet metal stampings, especially in the floor pans. I realize this is a lot of material, and you can do this project in steps as time and money permit. Once you start laying the rolls, you will find out how quickly they get used up.
If you want to get really trick, you can get one of those stainless steel firewall covers to finish it off and help reflect heat away from the passenger compartment. Now you are through outside.
Once you get the firewall completely covered in this manner, hardly any heat or noise will come through here. The difference will be nothing short of dramatic. If you keep your valves adjusted regularly and the distributor drive is not worn (see Bill Conkelís solution Ė excellent article), you will hardly hear the engine run compared to before.
Since this is obviously going to take more space than the newsletter will allow, I will need to do this article in two parts. Besides, itís time to get a bratwurst hot dog after all that work!
Your VW Maniac and tech specialist,