[chuckcobra]

In about 900 miles of Daytona coupe street test driving, one of the main "issues" that needs to be addressed is the reduction of interior noise level.

This past weekend, I borrowed a sound meter to measure interior noise levels. Keep in mind that the interior of the coupe is completly bare aluminum, so I was prepared for some high noise readings. I only got to do one test and the meter hit 99.5 dB(A) while crusing at about 45 mph. I didn't capture a measurement for a full throttle run, but it was significantly higher.

Whatever sound attenuation material that I use must be applied in a manner that does not detract from the original interior look (e.g. flat black paint for upholstery). This essentially means that I will be limited to insulating only hidden areas of the car (firewall, transmission tunnel, rear floor, rear quarter panel walls and perhaps the door skins).

A secondary issue is the reduction of interior heat (it was 102 degrees F the day that I was doing the noise tests which is one of the reasons for only one reading.) I don't know whether a single product can be equally good for both noise and heat reduction or whether it is a a compromise to obtain both.

Any suggestions on manufacturers of sound attenuation material that I could contact for this application.

Regrds,
Chuck