Dedicated to the Promotion and Preservation of American Muscle Cars, Dealer built Supercars and COPO cars. |
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#1
02-20-2004, 01:46 AM
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Re: 70 GTO question
Bob,
Only a few early '70 GTO's were fitted with "Vacuum Operated Exhaust" (VOE), before GM put the "kabash" to it. The system used a "tiger button", which resembled a RAM AIR pull knob. When pulled, vacuum went to a solenoid which moved a baffle inside the muffler. The baffle directed exhaust through a lower restriction area of the muffler, which also enhanced the sound. To see the neat application for real, click the link below to watch the 1970 GTO commercial titled "The Humbler", which was also pulled by GM. The VOE and the commercial were too suggestive of racing, so GM dropped them. The Humbler Rita 
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<span style="font-style: italic"><span style="color: purple"> "Live Big, Live Bold, and live GENEROUSLY. Like Peter did." ~Tom Breske RIP COPO PETE! </span> </span> 
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#3
02-20-2004, 02:22 AM
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Re: 70 GTO question
I'll say, wonder what the prices would be. Ungodly amounts of cash would be able to buy it, but making it last would be another story. That would be a cool thing to find on any car. . . what years did they make that system? Was it only Pontiac, or did the rest of GM have similar systems?
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John "Hutch" Skierka
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#7
02-20-2004, 07:32 PM
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Re: 70 GTO question
I remember seeing a feature car in one of the Muscle Car magazines a few years ago that was so equipped. Just incredible the crazy stuff you used to be able to get, although I must say I never heard of it back in the day.
Rita, you get the Gold Star for the day for coming up with the link to that commercial 
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Bill Pritchard 73 Camaro RS Z28, L82, M20, C60
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#8
02-24-2004, 09:11 PM
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Re: 70 GTO question
[ QUOTE ]
Bob, Only a few early '70 GTO's were fitted with "Vacuum Operated Exhaust" (VOE), before GM put the "kabash" to it. The system used a "tiger button", which resembled a RAM AIR pull knob. When pulled, vacuum went to a solenoid which moved a baffle inside the muffler. The baffle directed exhaust through a lower restriction area of the muffler, which also enhanced the sound. To see the neat application for real, click the link below to watch the 1970 GTO commercial titled "The Humbler", which was also pulled by GM. The VOE and the commercial were too suggestive of racing, so GM dropped them. The Humbler Rita [/ QUOTE ] Very, VERY cool, thanks for the link! Man that thing sounded sweet!  Eric
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