Originally Posted by Merlin 91/97
The rate that the exhaust leaves the car is pretty damn fast.... and assuming you could get an electric motor to spin "faster" then that, it would create less back pressure, and it would create a pull.... I don't think there are any gains to be made by this method.
But wouldn't 'almost' the same thing be done by just opening your exhaust up a bit more...? I know it wouldn't create the sucking you were looking for, but it removes the back pressure.
See DrJay'* post... the idea of an engine needing "backpressure" is a myth from what I understand.... I know this point has been ridden into the ground, but I think exhaust tuning is more dependent on making your pipe small enough to achieve the proper velocity of exhaust gas. By opening up your exhaust you're slowing down the exhaust flow, which is bad (unless you've offset the larger exhaust with performance mods). Even if you just make your exhaust piping shorter, you're not increasing the speed of the gases. My idea is to simply speed up the exhaust flow by creating suction.
I know there'* no use debating the effectiveness of this stuff until it'* actually tried out, like you said. I just wanted to make sure I'm communicating my original idea and the principles behind it. If I have the means someday, I'll see what I can do with this concept.