Paul,

I have never scribed to this forum prior to this however I read daily the
comments of others.

I am building an RV6-A which will be powered by a 2004 RX-8 six port engine.
I am mounting the engine now.  I have installed a heat exchanger (coolant to
air) in the cockpit to heat the cabin for winter operation.

The RX-8 engine currently has a heater coolant tap on the rear of the engine
and I intend to use that, I also intend to use a four port modulated heater
control valve.  The RX-8 currently does not route the coolant that goes
through the cabin heat exchanger through the engine cooling heat exchanger,
it returns to the suction side of the coolant pump after passing through the
cabin heat exchanger.  The question is: Would it be worth the extra effort
to route this cabin heat exchanger return coolant through the engine cooling
heat exchanger?  Let’s face it the only time heat will be removed from that
volume of coolant is when the cockpit heater is being used.


Thanks,

John Burke

Do you have my book "How to Cool Your Wankel" ?


If you are talking just the return flow as I recall it goes
to the inlet side of the RX8 pump. That is the cooled fluid
input side. That helps cool the engine when the cockpit
heater is in use.


Paul Lamar


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