I read an article about how Pontiac GTO's were advertised back on Super Bowl IV with these mufflers that had a vacuum in them that was activated by a ****. The vacuum would move some piece of metal in the muffler that would result in making it the equivelant of a straight pipe. GM pulled the ad and eventually pulled the option itself. Supposedly, there is a guy from Michigan that has recreated the same effect, but I think he uses electronics instead of vacuums. I was wondering what people thought of the idea of mufflers like that and if they think they would be worth it. I think they would be fun to have, but they come at about $700-800 each.....run duals and you're looking at $1400 minimum.

 

Or you could run a cutout instead.

 

an electic cut out at that so you would just need to push a button

 

The advantage is that if a cop looks up under the car, there is no cutout, which are illegal in virtually every state in the country. Worth it? If you lower your car enough, no donut-filled cop could see under it anyway.

TA

 

Or you could just cut the inside of a muffler out, and run a pipe straight thru it.

 

...but then you couldn't get it to be quiet when you needed it quiet. I think a stealth electric cutout is the ticket, or maybe lack of a ticket is the better phrase.

TA

 

Exactly, the idea is to make it go from quiet to loud whenever wanted. Riding around in a car that's loud gets annoying after a while and this car is going to be my daily driver.

 

A lot of the new corvet's have these mufflers on them but they automaticly open above 4,000 rpm I think.

 

thats what i was just going to say. yeah it is either 4000 or 4500 cant remember which one.

 

Time for an electric cutout, built INSIDE a custom "muffler". Not exactly a hard thing to build, just a matter of getting the muffled sound level/quality, to where you want it.

But keeping the electronics happy inside a hot muffler, would be the trick.

 

Could small pneumatic actuators with a small air pump work? Then the acuators could be in the mufflers and the air pump be belt driven and no one's the wiser.

 

Well I know the actuators on the vette's are right behind the muffler and the mufflers have duel outlets. one is blocked of for every day driving and then when you get on it it opens up leaving the exaust go through the side with less restricton and more noise. They are vacum actuated. normaly open and when vacum is applyed they close.

 

http://www.youtube.com/watch?v=RaJy6XLKH8E

Maybe take some new vette mufflers fabricate them to fit your exhaust and use the mild to wild controller which allows you to open up the flowpath in the muffler anytime you want, and i bet it could be done for less than trying to custom build some cutout mufflers.