exhaust gas mixes with outside air, there will be enough residual heat in

the exhaust gas (particularly at cruise and take off power) to ignite any
unburned hydrocarbons as it mixes with fresh air.  If my theory is correct,
this setup may create more heat than the tail pipe can handle.  It may
create more heat in the exhaust system than compared to a straight pipe.

Dave, The "thermal reactor" used in the earliest rotaries actually injected 
fuel or was run extra rich in addition to air to
keep the reaction going.  We shouldn't have a problem 
as the dual can should help reduce the temperature even before the air mix
takes place. All exhaust parts in pre RX-8 engines are 
subject to high temperatures. If the exhaust rubbing the can works as we
hope then temps should be below the ignition temp. The best 
possible result would enable us to use a reasonable gage of
321SS.The fuel injected rotary also doesn't spill nearly as 
much fuel into the exhaust, even at full power. Bill Jepson

 
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