10-09-2002, 09:30 AM
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CC Member
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Join Date: Jul 1999
Location: Prescott Valley,
AZ
Cobra Make, Engine: Previous ERA owner on break
Posts: 600
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Not Ranked
Some late information
Going on four years ago, I replaced my old pipes with a set of the "ceramic mat" sidepipes from Stainless Specialties. Before I sent in my check, I talked with a gentleman from New York who had actually tested both of the Stainless Specialties types (baffled vs. ceramic) against open headers on a dyno. For info, his car was equipped with (I believe I recall correctly) a stock dimension 427 running dual Holleys. This gentleman kindly sent me copies of the test run sheets. Bottom line: the delta between the open headers and the ceramic pipes was only a few hp and no difference on noise level, while the difference between the baffled pipes and the open headers was on the order of 45 hp and a noise level difference of about 5 dB. Noise levels were measured at 20 feet from the end of the pipes. My conclusion from his data was that the baffled pipes cost a lot of hp for not a lot of muffling (at least on the big block FE), so I went with the ceramic pipes.
FWIW, the wife and I use ear plugs when we ride. I have always worn ear plugs while flying (going on 30 years in helicopters), and have found that the EAR brand yellow foam plugs seem to work the best.
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Some folks drink from the fountain of knowledge; others just gargle.
Yesterday's flower children are today's blooming idiots.
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