Re: Piping exhaust outside.

Rebel Moby /
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Dumping a exit that is less than 1 inch into a pipe that is 2 inch will not measurably change the "atmospheric pressure at the end of the exhaust" as much as a device creating a partial vacuum in a collector box.... just saying...

> Brad William Wrote:

> -------------------------------------------------------

> For tuning's sake you probably don't want to mess with any big changes

> in atmospheric pressure at the end of the exhaust. A two stroke is

> going to be more sensitive to this than a four. So just extending the

> pipe out the window with a hose connected to the exhaust is going to add

> back-pressure.

>

> When I've run a two stroke indoors I've set a good sized cardboard box,

> , opened at one end, that end facing the exhaust, plug a shop vac hose

> into the other end of the box, and run a hose from the shop vac's

> exhaust out a window. 100 percent effective without altering the tuning

> of the pipe.

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