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exhaust idea


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Scolson
01-12-2006, 08:43 PM
I'm fairly ignorant to a lot of car stuff, but is it necessary for the exhaust to run all the way to the back on these cars, the rest of the drivetrain is in front of you. I think it owuld be very badass for it to come out behind the front wheel maybe?

Or I'm really retarded.

das2123
01-12-2006, 10:29 PM
The reason you want the exhaust to go to back is for a couple of reasons:
1) You want the dangerous carbon monoxide that exits the tailpipe to be away fron the cabin of the car.
2) I don't know if this true, but I have heard people argue that you need the exhaust for backpressure. Not enough or too much and you can and will lose HP.

Now I think it would be nice to have the exhaust tips come out the side if front of the rear wheel but then you get into custom piping. And in case you were wondering, putting a big muffler on your car will NOT increase HP in your neon!

Turbodog97
01-13-2006, 12:01 AM
In a Srt that's one of the most effective exhaust systems...I'm not sure about backpressure for a n/t but it's not good in a turbo car :grinno:. Either way it would still look cool though...and besides...as long as you have the cat, the backpressure caused by the cat should be plenty.

Scolson
01-13-2006, 05:33 PM
So does anyone agree with my logic, the rest of the car is in front why use all that material to run it to the back? The only carbon monoxide dangers I could see is possibly windows down and the car stopped, possobly it coming in through the window, butit seems unlikely. Has anyone done this, and does anyone have a picture? Thanks in advance.

neon_rt
01-13-2006, 07:14 PM
The length and diameter of the exhaust has an influence on the torque curve. When exhaust is pushed into the system and then the valve is slammed closed, there is a negative pressure at the port. That negative pressure then stops the flow in the system and causes it to come rushing back. In low RPMS and at low throttle settings, this exhaust returns at about the same time the exhaust valve opens again. This partialy blocks the exhaust from completly emptying from the cylinder. That left over exhaust then becomes padding in the cylinder to help raise the air pressure b/c there is not enough velocity in the intake yet to fill the cylinder anyway. This is why higher backpressure can make more torque at lower RPM. At high RPMS, it is intended that the exhaust valve open before the exhaust in the system loses velocity and starts rushing back. With the negative pressure at the port, the valve pops open and the exhaust is literaly sucked out of the cylinder. In the higher RPMS, the intake has enough velocity to completely fill the cylinder and make more torque.
If you are a noob and don't understand the dynamics of the system you can actually make less power by altering the exhaust system or you may get lucky and get more power.

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