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Michael Paauwe wrote:
I was reading through my back log of ACRE emails this evening and I read Paul's
concerns about plugs up installations.
One of the points he makes is that the heat transfer from the combustion chamber
wall is by a process known as nucleate boiling... well at high power anyway.
His concern was that with a plugs up installation the range of nucleate boiling
would be exceeded and film boiling would occur instead. The result of this would
be an increase in the temperature of the combustion chamber wall which he says will
cause the plating to come off.
Just exactly which message was that Michael? I don't recall saying that about Mazda
engines. PL
He states that those who have tried plugs up have been having enormous problems
with the cooling of their engines
Well I've been following this group for a month or two and this opinion does not
seem to born out by facts.
Well try the fact that Neil, as I recall, has been working on his plugs up
engine cooling for eight years and he has less than 40 hours. I am
I correct Neil? PL
The main problems that I have with this are:
All of the problems with overheating that I have heard mentioned have been to do
with the water overheating. I have heard no one say that the engine has over
heated or that the plating material has been worn off the rotor housing.
Ed Anderson overheated his plugs up engine to the point of having to replace
the rear rotor housing. PL
If, as has been suggested, the plugs up installation reduced the heat transfer from
the combustion chamber then cooling the water would be less of a problem than with
a standard orientation.
That is not the only problem with plugs up. The oil drain backs are wrong and
the oil cooling of the rotor may be affected. This could overheat the
apex seal spring and cause a loss in temper.
I searched the ACRE NL CD for the word plating starting in 07/98 and never
was it mentioned in the context of plugs up.
In fact you have uploaded only two messages to our newsletter as far as I can
tell. I also searched the CD for your signature "Mike Paauwe" or "Paauwe".
I found only one sarcastic comment having to do with flywheel nut torque
in August 2000 and one message with incorrect information about Mazda water
pumps being 5 to 10% efficient at 6000 RPM also in Aug 2000. If that was
indeed the case it would take somewhere around 50 HP to drive the pump at
6000 RPM. Any high school physics student could make that calculation.
If you do indeed exist Michael and you have a masters degree in engineering
and an A in thermodynamics why have you waited till now to correct me?
Never ever has anyone suggested polishing the water jacket.
I also would appreciate it if you did not upload graphics to this news group you
downloaded from the ACRE News Letter. "heinz-cooling-txtd.gif"
I think you are a liar Michael and this post is pseudo technical bullshit.
Paul Lamar
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