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Chris, below is an email I submitted previously regarding the use of a restrictor plate. I have yet to do a back to back test on same day with/without the restrictor but it is still in place.
Jeff
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From:
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Jeff Whaley <jwhaley@datacast.com>
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Subject:
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Coolant Restrictor Plate
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Date:
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Thu, 28 Jul 2011 07:26:18 -0700
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To:
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'Rotary motors in aircraft' <flyrotary@lancaironline.net>
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I saw Lynn’s coolant diagram with a restrictor plate in it … you guys with evaporator cores and 1” coolant hoses have a 1” restriction, this based on Mazda’s
design of 1.5” inlet/outlet on the stock water pump and the stock design includes a thermostat. With all of that as a background (never had a thermostat), I decided to try a restrictor plate in my coolant system, using a 0.75” hole in a plate at the water
pump outlet into my 1.5” radiator hoses. I can say that it doesn’t do any harm and may have actually provided about 5% improvement … more testing to follow.
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From:
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Chris Barber <cbarber@texasattorney.net>
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Subject:
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Thermostats.
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Date:
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Sun, 26 Feb 2012 17:29:06 +0000
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To:
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"flyrotary@lancaironline.net" <flyrotary@lancaironline.net>
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I have been searching the archives but to scant successes regarding thermostats use or lack of use for cooling.
I have been having issue with cooling lately. I use to be able to idle on the ramp for over an hour in the middle of a Houston summer with adequate cooling. However, lately temps are rising faster
and higher.
Yesterday, while troubleshooting this issue I noted that after about a ten minute taxi that the mounting location of my coolant temp probes was reading about 220 degrees measured with a handheld
thermo gage, close to what was being indicated on the panel However, the top of the radiator was cool to the touch. The handheld thermo gage read 45 degrees. Ok. Seems to be a flow/thermostat/pump issue. I will be Looking into this ASAP.
This got me to think about thermostat usage. I have one. I know some do not use them.
It is my understanding that if you remove the thermostat you have to close some passage off. What passage is this and why does this need to be done. Also, what is the accepted method.
While researching I also saw discussion on restrictive plates. While I am not considering a restrictive plate, the thread discussed drilling holes in the thermostat itself. Lynn mentioned do it
caught my interest.
It seems this is something I use to know but now forget where I saw it. I just finished reviewing my partial scan of Tracy's conversion manual to no avail and my archive search is giving me hundreds
of returns.
Thanks,
Chris
Sent from my iPhone 4
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