I bought a 40 amp nippondenso alternator from Romaine electric in Seattle, I changed out the smaller v drive pulley for a 3 inch poly V belt pulley that they had available there. The whole deal was about $140 iirc.

 

By the way, I like your intake manifold. It is configured and looks like mine, but the execution is much neater.

 

Brian Trubee

-----Original Message-----
From: Mark Steitle <msteitle@gmail.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Mon, Nov 28, 2011 8:54 am
Subject: [FlyRotary] Re: CG Products Intake Manifold

Chrissi,

You may want to check out the Honda "SR20 power steering pulley" to
use as an oversized alternator pulley.  I used two of these for a
while until I switched to the Renesis water pump and crank pulleys.
They are 4" OD.  They have splines in the shaft bore that will need to
be removed, but other than that, they worked fine.  They are steel, so
they are bit heavier than their aluminum counterparts.  I bought mine
off ebay for < $20.

Mark


On 11/28/11, CozyGirrrl@aol.com <CozyGirrrl@aol.com> wrote:
> Vendors just love it when people don't ask discretely back channel (where's
>  the sarcasm smiley?)
>
> Its a work in progress. Finished up to the point of everything on the hot
> side. As we said earlier it will be a complete solution, not something that
> is  going to leave you with having to figure out the other half on your own.
> In our  case this has meant effective implementation and mounting of the
> alternator(s).  We are also using the renesis water pump which adds several
> new wrinkles to the  mix.
>
> -even with underdrive e-shaft pulleys you will be considerably overdiving
> any automotive alternator in cruise. Our calculations worked out the need
> for a  4" diameter alternator pulley(s), confirming Mark's choice.
> Unfortunately Mark's  chosen vendor has discontinued the pulley. We were not
> able to
> find another  vendor making a 4"OD/15mm ID so we had our preferred vendor
> (us)
> make them since  we needed 2 for our engine, 2 for the spare and 2 for the
> show mockup.
>
> -The Samarai alternator fits on the renesis mounting boss but the pivot
> bolt is smaller, Rather than drill out the alternator the boss should get
> bushed  out with stainless bushings. This aligns the alternator with the
> water
> pump. The  alternator is flopped over to the cold side, this improves the
> wrap of the belt  and lowers the top profile.
>
> -the renesis alternator/WP combination does not align with e-shaft pulley
> by something less than an inch. We are machining a spacer to move the whole
> WP  assy out the needed distance and all pulleys will be aligned. We have a
> few  renesis front covers to work out the CNC tool path for separating the
> WP housing  from the front cover. Its sort of a hairy job to do with a large
> bandsaw and a  couple of hours with a die grinder to clean them up. If you
> have renesis front  covers available we would be interested in buying them
> to
> use as cores.
>
> -This will determine the placement of the second alternator over on the
> cold side running off of the forward e-shaft pulley. Then we can machine the
> new  side mount for the second alternator. The mount will be available in
> two
>  configurations, one for a single alternator installation using the eshaft
> pulley  closest to the front cover and in this dual alternator configuration
> using the  other pulley.
>
> -finally this will determine what room is left for the plenum and throttle
> body on the cold side. Convoluted getting there huh?
>
> -availability. Going to make it a priority over the winter to make some,
> also have the gasket for a 20B to work out the flange for it.
>
> -Beta testers; ever notice they don't call them Crash Test Dummies in
> aviation?
>
> Chrissi &  Randi
> _www.CozyGirrrl.com_ (http://www.cozygirrrl.com/)
> CG  Products, Custom Aircraft Hardware
> Chairwomen, Sun-N-Fun Engine Workshop
>
>
> In a message dated 11/27/2011 9:06:01 P.M. Central Standard Time,
> crobinson@medialantern.com writes:
>
> On  11/27/2011 10:02 PM, Thomas Mann wrote:
>> Check with the Cozy  Girrrls.
>> I saw their manifold at Airventure and it's a work of  art!
>>
> I posted this publicly to try to get their egos going. =D I  was in the
> hangar today looking at my intake, just under half done, and  saying
> "wow, I really don't want to finish this now that I've seen what  the
> Girrrls have coming..."
>
>
> --
> Homepage:   http://www.flyrotary.com/
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>
>
>

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