From: "Stephen Izett stephen.izett@gmail.com" <flyrotary@lancaironline.net>
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Subject: Re: [FlyRotary] Waterpump Rpm
Date: Fri, 18 Aug 2023 16:16:53 +0800
References: <list-2301796@lancaironline.net>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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Message-Id: <906BEF4D-7374-47D7-B192-904292871E5B@gmail.com>


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Hi guys

The pumps that I am aware of are:
Green Brothers Racing - =
https://www.facebook.com/GreenBrothersRacingLtd/posts/rx8-series-1-waterpu=
mp-genuine-mazda-new-gasket-included-fits-2003-2008-impeller/1947408425367=
932/
RE-mendy - =
https://mazmartstore.mybigcommerce.com/re-medy-high-flow-water-pump-for-rx=
-8-2004-2008/

I do not remember the pulley size on our alternator. I can remember =
ordering it from the Eastern States of Aust.=20
I=E2=80=99ve put it on my todo list to measure when I=E2=80=99m at the =
hangar, possibly Sunday.

If I could be assured of the reliability of the latest water pumps I=E2=80=
=99d go with electric and get the benefits of modulating the pump speed =
for automatic temp control at cruise.
The cowl flap gives some control but it can still get too cold in cooler =
weather.

Cheers
Steve


> On 18 Aug 2023, at 3:08 am, Marc Wiese cardmarc@charter.net =
<flyrotary@lancaironline.net> wrote:
>=20
> Steve,
> What company in New Zealand had this stuff? What dia pulley and where =
from on alternator? Inquiring minds want the specs?
>=20
> Marc
>=20
> On the Renesis I=E2=80=99ve put a race pump on to =E2=80=98reportedly=E2=
=80=99 reduce cavitation as the basic pump is reported to cavitate at =
the rpm=E2=80=99s we operate in during take off.
> When I took out a restrictor in the return to the radiator on one =
flight tamper went up considerably and I reasoned this was caused by =
cavitation.
> In response I purchased a race pump from New Zealand.
>=20
> My water pump is running at OEM speed, but I slowed my alternator with =
a larger pulley.
>=20
>> Hi : What is the optimum waterpump rpm for the 13B as i can modify =
the=20
>> pulley diameter and ratio=E2=80=99s for my set - up The data i have =
is that at the standard ratio is 1:1.18  at 6500 rpm for the 13B the =
pump flo is round about 150 - 160 L per minute.
>> So my question: If i run on 6500 rpm for take off then the waterpump =
impellor turns 6500 x 1.18 ???
>> Must i put on a bigger diameter pully on the pump for a flo of round =
about 100 L per minute.?
>> Don=E2=80=99t know  ?
>>=20
>> If somebody can help me with that
>=20
>=20
> --
> Homepage:  http://www.flyrotary.com/
> Archive and UnSub:   =
http://mail.lancaironline.net:81/lists/flyrotary/List.html


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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"overflow-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;">Hi =
guys<div><br></div><div>The pumps that I am aware of =
are:</div><div>Green Brothers Racing -&nbsp;<a =
href=3D"https://www.facebook.com/GreenBrothersRacingLtd/posts/rx8-series-1=
-waterpump-genuine-mazda-new-gasket-included-fits-2003-2008-impeller/19474=
08425367932/">https://www.facebook.com/GreenBrothersRacingLtd/posts/rx8-se=
ries-1-waterpump-genuine-mazda-new-gasket-included-fits-2003-2008-impeller=
/1947408425367932/</a></div><div><div>RE-mendy -&nbsp;<a =
href=3D"https://mazmartstore.mybigcommerce.com/re-medy-high-flow-water-pum=
p-for-rx-8-2004-2008/">https://mazmartstore.mybigcommerce.com/re-medy-high=
-flow-water-pump-for-rx-8-2004-2008/</a></div><div><br></div><div>I do =
not remember the pulley size on our alternator. I can remember ordering =
it from the Eastern States of Aust.&nbsp;</div><div>I=E2=80=99ve put it =
on my todo list to measure when I=E2=80=99m at the hangar, possibly =
Sunday.</div><div><br></div><div>If I could be assured of the =
reliability of the latest water pumps I=E2=80=99d go with electric and =
get the benefits of modulating the pump speed for automatic temp control =
at cruise.</div><div>The cowl flap gives some control but it can still =
get too cold in cooler =
weather.</div><div><br></div><div>Cheers</div><div>Steve</div><div><br></d=
iv><div><br></div><div><br></div><div><br></div><div><br></div><div><br></=
div><div><br></div><div><blockquote type=3D"cite"><div>On 18 Aug 2023, =
at 3:08 am, Marc Wiese cardmarc@charter.net =
&lt;flyrotary@lancaironline.net&gt; wrote:</div><br =
class=3D"Apple-interchange-newline"><div><div>Steve,<br>What company in =
New Zealand had this stuff? What dia pulley and where from on =
alternator? Inquiring minds want the specs?<br><br>Marc<br><br>On the =
Renesis I=E2=80=99ve put a race pump on to =E2=80=98reportedly=E2=80=99 =
reduce cavitation as the basic pump is reported to cavitate at the =
rpm=E2=80=99s we operate in during take off.<br>When I took out a =
restrictor in the return to the radiator on one flight tamper went up =
considerably and I reasoned this was caused by cavitation.<br>In =
response I purchased a race pump from New Zealand.<br><br>My water pump =
is running at OEM speed, but I slowed my alternator with a larger =
pulley.<br><br><blockquote type=3D"cite">Hi : What is the optimum =
waterpump rpm for the 13B as i can modify the <br>pulley diameter and =
ratio=E2=80=99s for my set - up The data i have is that at the standard =
ratio is 1:1.18 &nbsp;at 6500 rpm for the 13B the pump flo is round =
about 150 - 160 L per minute.<br>So my question: If i run on 6500 rpm =
for take off then the waterpump impellor turns 6500 x 1.18 ???<br>Must i =
put on a bigger diameter pully on the pump for a flo of round about 100 =
L per minute.?<br>Don=E2=80=99t know &nbsp;?<br><br>If somebody can help =
me with that<br></blockquote><br><br>--<br>Homepage: =
&nbsp;http://www.flyrotary.com/<br>Archive and UnSub: =
&nbsp;&nbsp;http://mail.lancaironline.net:81/lists/flyrotary/List.html<br>=
</div></div></blockquote></div><br></div></body></html>=

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