In cowl exhaust solutions?

[Craig Spence]

Hi all,
Thanks for the feed back.
I will take a few photos tonight if I can, the problem is as was said above.
The space between the engine and the cowl is very tight, no room at all really. The radius is far too tight from the engine exhaust outlet (threaded exhaust port) to bend it to clear the cowl. On top of that if I fit the silencer there's no chance of fitting it, I tried bending the pipe and it is points less, even when it's supported the cowl still doesn't fit in position.

I tried it without the silencer as well, no chance lol.

I measured the length of the silencer and the gap from the outlet to the wooden fixed cowl, no chance again lol.

That's why I've come up with the above suggestions.

As for suction it never occurred to me really but a very god thought. Although after looking at the said set up I don't think it's going to happen.

If there was a smaller peice of pipe protruding inside of the smaller silencer it could in theory creat a Venturi effect. But this is not the case, the air will enter a void space, the central air will push straight through the middle but the escaping air will hit the lower tapper, bounce back (pushing air through the nipple) and then get pushed through with the faster air and repeat process or so goes the theory.

My worry was it may be too much back pressure which would swell the tank or blow off a line or something.

I will post pics tonight and also a drawn picture with explanation.

Cheers all.