X-Junk-Score: 0 [] X-KAS-Score: 0 [] From: "Stephen Izett stephen.izett@gmail.com" Received: from mail-pl1-f172.google.com ([209.85.214.172] verified) by logan.com (CommuniGate Pro SMTP 6.4.0) with ESMTPS id 2314204 for flyrotary@lancaironline.net; Tue, 22 Aug 2023 05:01:43 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.214.172; envelope-from=stephen.izett@gmail.com Received: by mail-pl1-f172.google.com with SMTP id d9443c01a7336-1bf11b1c7d0so33407305ad.0 for ; Tue, 22 Aug 2023 02:01:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1692694887; x=1693299687; h=message-id:in-reply-to:to:references:date:subject:mime-version:from :from:to:cc:subject:date:message-id:reply-to; bh=HiHDfPJZfJ8YA/1ANwhf42hqLMWHxH4E7/PSlFo4Ywg=; b=lx4g9yOXI9gVzmF4nusseGJOWWeYktk8FzYDsCJGFsrgXxtLzFX+fS4SddyYF7kyGV Zy+ysSkC0Yit1yy1U/nK9+jAFTv5wVqMd5Yzgm7K4pobJJ/YGZU3OjlD4CB1JZgodxoW azwr+oQreuoWn7fr65m1IgRyvuIybfiLhpdLbAimsKwAE7JErpJbPlEoIsIKdIaZAGhQ XSmkU8HDdApCiGJU6mLiso0Bh7Z6dpWOvVEEaK3K8S/nQqWMuedQwE/M53AAOh1CdLm5 xFCfsrgaDEAnfCFHLutDmnQ8f6la/sM5wnaZjToLnnaJWNMJRFM/uF30p7VgAg86M9+e VkVw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1692694887; x=1693299687; h=message-id:in-reply-to:to:references:date:subject:mime-version:from :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=HiHDfPJZfJ8YA/1ANwhf42hqLMWHxH4E7/PSlFo4Ywg=; b=legDi+xyDpq4rtA7Flvv7R64n87ZjDMGe1fMF+PrypyxzuxMG+2cgbbX/O/rYA42OD NE8tS0mUUp4QJXk6I7uwgSo+ryLUO43XVaCRRUVsO5c6VuCVzofiWsnjxdNr5nVU3+fd lB27p07n1xxWbW/LUz9dXz1pt3kYJu2eOgOHFOiYi0UonMX/098MlyVwH4iZuvWxMfg0 rMDjj2rP4wQPJnm10TQrod6nc85aU4a+AvzUB4VER9CWHZy6eF2QiVCRIv6YbiyasQPY IRzycWkJH7+nHVKDIAdhfhLAFoyhCNqQyVy5y5k1v8I4+Q1vwYiNJS9Om7WQmkNaWsW/ CgEA== X-Gm-Message-State: AOJu0YwJHGgq280HutYPRK5d7b5SHkFJ4seUKavQb+xZqzSOJrn749wu 9UPYicoY7OJwts3AJavLzrjRBbtxxqE= X-Google-Smtp-Source: AGHT+IGK4twdslY/91uy93pFevq19Gr7eUqDxMlGkmCQ6VFvDcj3Mrk7d0gYd1p+Lay01Js/v2nF1g== X-Received: by 2002:a17:902:e84b:b0:1bc:2d43:c74d with SMTP id t11-20020a170902e84b00b001bc2d43c74dmr13736234plg.34.1692694887006; Tue, 22 Aug 2023 02:01:27 -0700 (PDT) Return-Path: Received: from smtpclient.apple (220-235-72-153.dyn.iinet.net.au. [220.235.72.153]) by smtp.gmail.com with ESMTPSA id jh13-20020a170903328d00b001b83e624eecsm8580861plb.81.2023.08.22.02.01.25 for (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 22 Aug 2023 02:01:26 -0700 (PDT) Content-Type: multipart/alternative; boundary="Apple-Mail=_A58203AC-4301-44AC-9EA0-DF0258C7DAE1" Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3731.600.7\)) Subject: Re: [FlyRotary] Waterpump Rpm Date: Tue, 22 Aug 2023 17:01:12 +0800 References: To: Rotary motors in aircraft In-Reply-To: Message-Id: <86D39915-ED96-4456-A8FC-BD1F14D63DCE@gmail.com> X-Mailer: Apple Mail (2.3731.600.7) --Apple-Mail=_A58203AC-4301-44AC-9EA0-DF0258C7DAE1 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 Hi Dave My understanding (questionable) is: 1. The Series 1 Rx8 Renesis pump had known cavitation problems around 7K = and a redline of 7500. 2. That cavitation could be accentuated by removing the restriction of = the thermostat reducing pressure at the entry to the pump. 3. The series 2 Renesis engine had a modified pump impeller, which I = understood was to reduce cavitation at the new higher 8500 redline. The series 1 has a pressed metal impeller and the series 2 a plastic = more efficient design. The aftermarket pumps are milled aluminium. I also understood that they changed the bolt pattern of the series 2 = pump, so not easily allowing us to use a series 2 pump on a series 1 = engine, therefore the opening in the market for an aftermarket pump for = series 1 engines. My experience was that on removing a restriction in the flow leaving the = engine to the radiator, we encountered a significant rise in coolant = temp which I came to believe was caused by cavitation. This was my decision point to install an after market pump, seeking to = maintain flow rate without cavitation. However my research on questionable lists, my presumptions of what was = going on in the cooling circuit, and my decisions could well be faulty. Thanks for adding your experience Dave, you=E2=80=99ve been so helpful = over the years. Steve Izett > On 22 Aug 2023, at 4:11 am, David Leonard wdleonard@gmail.com = wrote: >=20 > Steve, In my experience the stock pump works great at least to = 7500rpm... (racing at Reno). Stock Pully size... Isn't the redline in = the stock car over 8k? =20 > David Leonard. >=20 > On Mon, Aug 21, 2023, 8:04 AM eanderson@carolina.rr.com = > wrote: >>=20 >> Here is a page with various year water pumps from MazdaTRix. >>=20 >>=20 >> Hoses and Pumps - Mazdatrix - Page 7 = >>=20 >> here is a link to some of their water pulleys >>=20 >> Pulleys - Mazdatrix = >>=20 >> Rotary_Ed >>=20 >>=20 >>=20 >> ------ Original Message ------ >> =46rom "Stephen Izett stephen.izett@gmail.com = " > >> To "Rotary motors in aircraft" > >> Date 8/18/2023 4:16:53 AM >> Subject [FlyRotary] Re: Waterpump Rpm >>=20 >>> Hi guys >>>=20 >>> 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/ >>>=20 >>> 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. >>>=20 >>> 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. >>>=20 >>> Cheers >>> Steve >>>=20 >>>=20 >>>=20 >>>=20 >>>=20 >>>=20 >>>=20 >>>> On 18 Aug 2023, at 3:08 am, Marc Wiese cardmarc@charter.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 >>>=20 --Apple-Mail=_A58203AC-4301-44AC-9EA0-DF0258C7DAE1 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8 Hi = Dave

My understanding (questionable) = is:

1. The Series 1 Rx8 Renesis pump had known = cavitation problems around 7K and a redline of 7500.
2. That = cavitation could be accentuated by removing the restriction of the = thermostat reducing pressure at the entry to the pump.
3. The = series 2 Renesis engine had a modified pump impeller, which I understood = was to reduce cavitation at the new higher 8500 = redline.

The series 1 has a pressed metal = impeller and the series 2 a plastic more efficient design. The = aftermarket pumps are milled aluminium.
I also understood that = they changed the bolt pattern of the series 2 pump, so not easily = allowing us to use a series 2 pump on a series 1 engine, therefore the = opening in the market for an aftermarket pump for series 1 = engines.

My experience was that on removing a = restriction in the flow leaving the engine to the radiator, we = encountered a significant rise in coolant temp which I came to believe = was caused by cavitation.
This was my decision point to = install an after market pump, seeking to maintain flow rate without = cavitation.

However my research on questionable = lists, my presumptions of what was going on in the cooling circuit, and = my decisions could well be faulty.

Thanks for = adding your experience Dave, you=E2=80=99ve been so helpful over the = years.

Steve = Izett











On 22 Aug 2023, at 4:11 = am, David Leonard wdleonard@gmail.com = <flyrotary@lancaironline.net> wrote:

Steve, In my = experience the stock pump works great at least to 7500rpm... (racing at = Reno).  Stock Pully size...   Isn't the redline in the = stock car over 8k?  
David = Leonard.

On Mon, Aug 21, 2023, 8:04 AM eanderson@carolina.rr.com = <flyrotary@lancaironline.net> wrote:

Here is a page with various year water pumps = from MazdaTRix.



here is a link = to some of their water pulleys


Rotary_Ed



------ Original Message ------
To "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Date 8/18/2023 4:16:53 AM
Subject [FlyRotary] Re: Waterpump Rpm

Hi guys

The pumps that I am aware of = are:

I do not = remember the pulley size on our alternator. I can remember ordering it = from the Eastern States of Aust. 
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:

Steve,
What company in New Zealand had this = stuff? What dia pulley and where from on alternator? Inquiring minds = want the specs?

Marc

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.

My water pump is running at OEM speed, but I slowed = my alternator with a larger pulley.

Hi : What is the optimum waterpump = rpm for the 13B as i can modify the
pulley diameter and ratio=E2=80=99= s 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  ?

If somebody can help me = with that


--
Homepage:  http://www.flyrotary.com/
Archive and UnSub: =   http://mail.lancaironline.net:81/lists/flyrotary/List.h= tml


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