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megaphones verses straight pipes
why would one choose a megaphone over just a straight pipe?
Jim
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Jim Hamilton If everything seems under control, your not going fast enough. |
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02-14-2005, 03:47 PM
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Me like track days
Join Date: Sep 2003
Location: Kirkland, WA
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I've wondered that too.
The Supercup cars use no megaphones. Perhaps it muffles a bit (?) or enhances carbureted cars' performance. Only my vague guesses....love to hear some educated answers
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- Craig 3.4L, SC heads, 964 cams, B&B headers, K27 HF ZC turbo, Ruf IC. WUR & RPM switch, IA fuel head, Zork, G50/50 5 speed. 438 RWHP / 413 RWTQ - "930 is the wild slut you sleep with who tries to kill you every time you "get it on" - Quote by Gabe Movie: 930 on the dyno |
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02-14-2005, 03:59 PM
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2014 Cayman S (track rat w/GT4 suspension) 1979 930 (475 rwhp at 0.95 bar) |
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02-14-2005, 04:26 PM
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Back in the saddle again
Join Date: Oct 2001
Location: Central TX west of Houston
Posts: 55,985
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And there you have it!
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Steve '08 Boxster RS60 Spyder #0099/1960 - never named a car before, but this is Charlotte. '88 targa  SOLD 2004 - gone but not forgotten
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02-14-2005, 05:03 PM
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Another thought, do a search for MotoGP + megaphone. It looks like the new 4 stroke bikes are running megaphones.
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2014 Cayman S (track rat w/GT4 suspension) 1979 930 (475 rwhp at 0.95 bar) |
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02-14-2005, 07:08 PM
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Location: Greater Metropolitan Nimrod, Oregun
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- doesn't say why...
you might want to sketch out the wavelength of a pressure pulse as it goes thru a diverging cone the diverging/converging cone seems to work by wave interference - there is some information in Phil Smith's classic text
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"A man with his priorities so far out of whack doesn't deserve such a fine automobile." - Ferris Bueller's Day Off |
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02-14-2005, 08:04 PM
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68, 70, 88, 99 Porsche 911 
1979 Porsche 930 3.4
