Mailing List Message #67406
From: Finn Lassen <>
Subject: Re: [FlyRotary] Coolant barbs
Date: Wed, 15 Mar 2023 08:45:33 -0400
To: Rotary motors in aircraft <>
On my flying installation the "to throttlebody" goes to bottle (surge can). "To heater" is tapped for temp sensor probe (made so long it sticks into water flow).

I removed the entire thermostat assembly and replaced with the attached. Two bottom tubes are 3/4" return hoses from radiators. Top is 5/8" hose to left rad. Drilled out the stock sensor hole for 5/8" fitting for hose to right rad. Small hole is for 1/8 NPT temp sensor.  No thermostat. 35 psi cap on top of bottle. Simple but would have been simpler with just one rad.
On 3/14/2023 9:37 PM, Mark McClure wrote:
Planning my coolant flow for my engine setup on test stand only. Want to minimize unnecessary water lines. In searching the list/rx-8 forums I couldn’t find any reason I cannot just block the in and out spots for the throttle body and heater cores. 

Will be bypassing the thermostat with center plug and hole tapped for air bubble. Only other line will be from radiator to expansion tank.

Am I mis understanding something?


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