I would do an oversized velocity stack much like what you find on the top of a Weber carb with it going through a steam driven turbine powered by a boiler on the stove which then exits via a converging diverging cone which propels the exhaust at supersonic speeds.
Speedy
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1983 944 guards red with 16" Fuchs, Host of Wisconsin area timing/ balance shaft belt tensioning party
1987 944S Purchased from Legion. Corvette LT-1 V-8 conversion with Mega Squirt II
Check on progress --->
www.porschehybrids.com/gallery/speedracing944
Favorite Road =
www.tailofthedragon.com 318 turns in 11 miles (11 min 20 sec best run)