Bill,
You wrote...
Is the shape of the two water pumps so similar that you can just cut one off, smooth the cut edges, and bolt it up to the other front cover?? --- Yes, that's exactly what I did. But first I tried using the entire Renesis front cover. I gave up on that and just cut the water pump section free of the front cover and used the Renesis WP and the 20B front cover. Saved about 6 lbs. over the cast iron 20B pump.
Not sure what you're asking about bolt holes. All the holes in the Renesis WP lined up with the 20B holes. However, it does take longer studs. Lining up pulleys may be a head-scratcher. I used the Renesis front hub and pulleys, but they required machining in order to make them work. I did that because I wanted the crank mounted CAS. I have since gone back to the stock CAS, but that's another story.
Mark
On Mon, Sep 27, 2010 at 12:47 PM, Bill Bradburry <bbradburry@bellsouth.net> wrote:
Mark,
In looking at your pictures, I couldn’t see where you used the band saw?? Is the shape of the two water pumps so similar that you can just cut one off, smooth the cut edges, and bolt it up to the other front cover?? For that matter, if it was originally a part of the front cover, why would it have bolt holes to bolt to the other cover??
Confused!
Bill B
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Mark Steitle
Sent: Sunday, September 26, 2010 6:44 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Coolant flow
Joe,
I installed a Renesis WP on my 20B. It is much lighter than the 20B pump and is more compact. If you use a custom inlet/outlet, you could run the lines very close to the engine. Mine are inside the c/l of the slide throttle.
A point of clarification... The Renesis WP is part of the Renesis front cover. Using a band saw, I separated the WP housing from the front cover. So, I used the 20B front cover with the Renesis WP.
On Sat, Sep 25, 2010 at 1:10 PM, Bill Bradburry <bbradburry@bellsouth.net> wrote:
Someone on the list is using an EWP. I don't remember who at the moment.
Maybe he will chime in later.
Sent: Saturday, September 25, 2010 1:51 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Coolant flow
Bill,
My installation does not have enough room to use the stock RX7 pump. I have
a Toyota Corolla pump that can with some modification be mounted on one side
of the motor. I had to get a Denso alternator to get an alternator to fit
along side the motor. I found a block that permits connectionof hoses to
where the pump used to be. The reason that I am asking all of these somewhat
strange inqueries is just to get a working scenario. My firewall is 22"
wide and this is a pusher so things get worse as you go aft. Another item
that takes a lotof room is the exhaust augmenter. The engine is also a P
Port. I do not believe I can get the cooling right without some additional
means. The shape of the cowls on a canard pusher is critical to effiency so
i am trying to stay tight.
I saw a video on a RX7 discussion group that used the Stewart EWP using the
similar block connection. Don't know if it would work in an AC.
Joe Berki
Limo EZ
----- Original Message -----
From: "Bill Bradburry" <bbradburry@bellsouth.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Saturday, September 25, 2010 11:52 AM
Subject: [FlyRotary] Re: Coolant flow
> What are you trying to do Joe? Does your engine not have a water pump or
> are you trying to accomplish something better? Someone on the list has an
> electric water pump hooked up.
>
> Bill B
>
> -----Original Message-----
> From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
> Behalf Of josrph berki
> Sent: Saturday, September 25, 2010 10:50 AM
> To: Rotary motors in aircraft
> Subject: [FlyRotary] Coolant flow
>
> Thanks for the info on the coolant flow. Currently the Mazda pump pulls
> coolant from the rad and pushes it into the driver's side water passage
per
> the info that you stated. The coolant comes out of the block on the
> passengers' side and goes to the radiator.
>
> Would it be possible to place a stand alone pump inlet at the outlet of
the
> block on the passengers's side and push the water through the radiator
then
> back into the block inlet on the driver's side? The down side would be
that
> the pump would see the hotest coolant. Are there other issues? Thanks
for
> any help.
>
> Joe Berki
> Limo EZ
>
>
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