Supertrapp vs Monza

["Janssen, Lee K" <lee.k.janssen@lmco.com>]

john donohoe wrote:

> Can anyone tell me how a Supertrapp muffler compares to a Monza system
> loudness-wise (on a GT6)?

Vizard conducted some tests on Supertrapp and concluded "... the Supertrapp
race car muffler cannot boast such flow figures until so many discs are in
the system that the noise reduction achieved is very minimal".
The reference is "Tuning BL's A-Series Engine" 2nd ed. 1989 page 251 - 253.

Hope this helps
Lee Janssen
Sunny Denver CO