From: "lehanover lehanover@aol.com" <flyrotary@lancaironline.net>
Received-SPF: pass
 receiver=logan.com; client-ip=74.6.133.124; envelope-from=lehanover@aol.com
Date: Fri, 15 May 2020 23:48:30 +0000 (UTC)
To: flyrotary@lancaironline.net
Message-ID: <1162511849.726851.1589586510812@mail.yahoo.com>
In-Reply-To: <list-243987@logan.com>
References: <list-243987@logan.com>
Subject: Re: [FlyRotary] Re: Water Pump
MIME-Version: 1.0
Content-Type: multipart/alternative; 
	boundary="----=_Part_726850_387584203.1589586510811"
Content-Length: 6154

------=_Part_726850_387584203.1589586510811
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

I raced Mazdas for 25 years. Used the stock 12-A water pump with a 5/8" res=
tricter in the outlet. Never a problem. Notice that the return hose from th=
e radiator on most cars is bigger and has a spring inside to prevent hose c=
ollapse. The hose collapse comes about when the water pressure inside the h=
ose is lower than local air pressure. When you increase flow rate and do no=
t change the restrictions in the loop (radiator, hoses, bends, or filter) c=
oolant on the suction side of the pump will boil. The pumps suction side wi=
ll see very low coolant pressures and cavitate. In aircraft, where nearly e=
very radiator is close to being too small this problem probably comes up mo=
re often. My cooling system worked perfectly because I used a huge coolant =
radiator ( very low restriction) and three oil radiators and a restricter o=
n the pump outlet. At first I used part of a thermostat for restriction. Th=
en a custom aluminum washer. If the washer was left out the temps went up. =
So I welded the washer into the outlet neck. We had two engines and the sam=
e two water pumps lasted all of that time. Shifting at 9,600 RPM.
 Lynn E. Hanover=C2=A0=20

In a message dated 5/15/2020 7:15:13 PM Eastern Standard Time, flyrotary@la=
ncaironline.net writes:

Thanks Guys for the feedback re pumps.Andrew, what information did you get =
that caused you to change to the Re-medy pump?Was it from a reputable sourc=
e, like racers? I=E2=80=99ve put it in the diary to call GoGear when I=E2=
=80=99m back in Perth early next week.I have little trust in advertising th=
ese days and if I=E2=80=99m going to go to the trouble and expense I=E2=80=
=99d like some science behind it.
Cheers
Steve

> On 15 May 2020, at 11:17 pm, Andrew Martin andrew@martinag.com.au <flyrot=
ary@lancaironline.net> wrote:> > I=E2=80=99ve had Mazmart Re-medy pump in s=
ince start. Seems thats been one component I=E2=80=99ve not had to worry ab=
out. > Andrew> > -- > Regards Andrew Martin Martin Ag

--Homepage:=C2=A0 http://www.flyrotary.com/Archive and UnSub:=C2=A0 http://=
mail.lancaironline.net:81/lists/flyrotary/List.html

------=_Part_726850_387584203.1589586510811
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: 7bit

<div>
<div class="userEdit" style="font-family: arial, helvetica, sans-serif; font-size: 10pt; color: #000000;">
<div><span style="font-family: arial, helvetica, sans-serif; font-size: 10pt; color: #000000;">I raced Mazdas for 25 years. Used the stock 12-A water pump with a 5/8" restricter in the outlet. Never a problem. Notice that the return hose from the radiator on most cars is bigger and has a spring inside to prevent hose collapse. The hose collapse comes about when the water pressure inside the hose is lower than local air pressure. When you increase flow rate and do not change the restrictions in the loop (radiator, hoses, bends, or </span><span style="font-family: arial, helvetica, sans-serif; font-size: 10pt; color: #000000;">filter) coolant on the suction side of the pump will boil. The pumps suction side will see very low coolant pressures and cavitate. In aircraft, where nearly every radiator is close to being too small this problem probably comes up more often. My cooling system worked perfectly because I used a huge coolant radiator </span></div>
<div><span style="font-family: arial, helvetica, sans-serif; font-size: 10pt; color: #000000;">( very low restriction) and three oil radiators and a restricter on the pump outlet. At first I used part of a thermostat for restriction. Then a custom aluminum washer. If the washer was left out the temps went up. So I welded the washer into the outlet neck. We had two engines and the same two water pumps lasted all of that time. Shifting at 9,600 RPM.<br> </span></div>
<div><span style="font-family: arial, helvetica, sans-serif; font-size: 10pt; color: #000000;">Lynn E. Hanover&nbsp; <br></span></div>
<div><span style="font-family: arial, helvetica, sans-serif; font-size: 10pt; color: #000000;"><br></span></div>
</div>
In a message dated 5/15/2020 7:15:13 PM Eastern Standard Time, flyrotary@lancaironline.net writes:
<div><br></div>
<div class="quotedReply">
<blockquote style="padding-left: 5px; margin-left: 5px; border-left: blue 2px solid;">
<div dir="ltr">Thanks Guys for the feedback re pumps.</div>
<div dir="ltr">Andrew, what information did you get that caused you to change to the Re-medy pump?</div>
<div dir="ltr">Was it from a reputable source, like racers? I&rsquo;ve put it in the diary to call GoGear when I&rsquo;m back in Perth early next week.</div>
<div dir="ltr">I have little trust in advertising these days and if I&rsquo;m going to go to the trouble and expense I&rsquo;d like some science behind it.</div>
<div dir="ltr"><br></div>
<div dir="ltr">Cheers</div>
<div dir="ltr"><br></div>
<div dir="ltr">Steve</div>
<div dir="ltr"><br></div>
<div dir="ltr"><br></div>
<div dir="ltr">&gt; On 15 May 2020, at 11:17 pm, Andrew Martin <a href="mailto:andrew@martinag.com.au" rel="noopener noreferrer">andrew@martinag.com.au</a> &lt;<a href="mailto:flyrotary@lancaironline.net" rel="noopener noreferrer">flyrotary@lancaironline.net</a>&gt; wrote:</div>
<div dir="ltr">&gt; </div>
<div dir="ltr">&gt; I&rsquo;ve had Mazmart Re-medy pump in since start. Seems thats been one component I&rsquo;ve not had to worry about. </div>
<div dir="ltr">&gt; Andrew</div>
<div dir="ltr">&gt; </div>
<div dir="ltr">&gt; -- </div>
<div dir="ltr">&gt; Regards Andrew Martin Martin Ag</div>
<div dir="ltr"><br></div>
<div dir="ltr"><br></div>
<div dir="ltr">--</div>
<div dir="ltr">Homepage:&nbsp; <a href="http://www.flyrotary.com/" target="_blank" rel="noopener noreferrer">http://www.flyrotary.com/</a></div>
<div dir="ltr">Archive and UnSub:&nbsp; <a href="http://mail.lancaironline.net:81/lists/flyrotary/List.html" target="_blank" rel="noopener noreferrer">http://mail.lancaironline.net:81/lists/flyrotary/List.html</a></div>
</blockquote>
</div>
</div>
------=_Part_726850_387584203.1589586510811--