Tail lights

So we're all doomed to a life of looking at Altezzas and body kits for the rest of our life? :thumbsdow
No, because when I take over the world, the only vehicles that will be permitted to have Altezzas on them are Altezzas. Body kits will only be permitted with the condition that I am allowed to remotely blow up your car whenever I get annoyed by you. Fart cannons will only be permitted with the condition that you can fit the entire "muffler" up your ***.

 
I may sound like a noob right here but, what is a "fart cannon" exactly. I know its something to do with the exhaust, like the muffler or the tip. But what exactly makes it a fart cannon, being over 3 inches or something?

 
There's not really any solid definition of "fart cannon", but I would say that it is any exhaust that is designed more to be loud than to produce any power gain. This only applies to aftermarket exhaust, as I would say Harley's (and similar bikes) are exempt from "fart cannon" status, despite being equally annoying at times.

Awhile back I had worked out some clever formula for determining when the diameter of the exhaust piping was too large for the vehicle, but I can't remember it now.

 
"fart cannon"...I would say that it is any exhaust that is designed more to be loud than to produce any power gain.
Going by this though I would say any muffler that is made for larger then stock exhaust piping, but is attached to the stock pipes, I would call that a fart cannon, by awalberts definition though.

But what about those people who go too overkill. Like those people who have an exhaust tip or exhaust piping that is bigger then what that cars exhaust manifold output size is, or if its a turbine driven car then the size of the output on the turbine?

And why cant motorcycles with the louder then needed exhaust pipes/mufflers, be called fart cannons? After all, some of them do follow your definition.

 
Because any stock exhaust system cannot be considered a "fart cannon". It's like how you can't call any factory/stock car "rice" really (or at least I don't view it as such).

I think something like the combined diameter of each pipe off the exhaust manifold/header divided by two should dictate the maximum size of your final exhaust pipe. Of course, with two manifolds/headers (as in a V engine), you'd divide by three.

There's not really any scientific reasoning behind my "formula", but it's a rough idea of when you're going overboard with exhaust.

There are many aftermarket mufflers that will offer power gains for vehicles in addition to being loud, but of course a completely new exhaust system (often with larger pipes) can provide even more performance. The vast majority of 4-cylinder cars have mufflers that don't restrict performance too much (there's not that much to restrict), but more powerful V8 cars often have very restrictive mufflers in order to meet noise and pollution requirements (as well as several catalytic converters, which also rob performance).

 
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