Spider Ansa exhaust

[Alan Lambert <gerard@domain.elided>]

I just replaced the rear muffler/tailpipe section on my '74 with an Ansa 
unit I got from Heinz Mihm (who advertises on this digest from time to time).

I was surprised that the exhaust became quieter rather than louder.

I looked closely, and found that the two pipes out the back of the Ansa 
had a tube inside them that reduced the diameter to 1 1/8 inches. 
The stock single pipe I took off had a diameter of 1 3/4 inches. If you 
do the math ( squaring, and doubling the Ansa) it turns out that the stock 
diameter gives a cross section some 20% bigger than the Ansa.

I thought the Ansa was supposed to help--according to the above, it hurts!
Any comments would be welcome. (ie do I go back to stock?? or is there 
something in the design of the Ansa that I don't understand.)

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Regards,
Alan G. Lambert___________________________________<gerard@domain.elided>
           *******Los Altos, California (office)*******

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