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In a message dated 9/8/2005 5:20:27 PM Pacific Standard Time,
jerryhey@earthlink.net writes:
Bill,
That may be the ideal arrangement. Sure would be great to be able to
curve the pipes down down under the engine. No matter where you run the
pipes, there is no hope of reaching a tuned length inside the cowl. That is my
opinion. I hope someone proves me wrong .
Jerry
Jerry,
The Mazda Factory header we once ran on an RX-2 had two truly
diverging head pipes 22-24 inches long. The tube was formed by hammering or
hydroforming both sides of the pipe. The seam was visible on the side. They
dumped into a diverging megaphone that exited under the middle of the passenger
door. Spectacular horsepower, brutally narrow powerband, HURT YOU LOUD. I can't
see how you could fit that headpipe length in a cowl pratically, and oh yea the
pipes started at 2" and got bigger from there. When designing a aircraft muffler
and header system we will have to try to follow the doctors oath; and first do
no harm, or as little as we can.
Bill Jepson
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