Subject: Alternator Pulley
From: Rotary Engine
Date: 3/12/2010, 7:01 PM
To: AAA Put this in the To box


 Hi Paul & Group,

 I'm going to use the stock Renesis alternator on
 my Bush Caddy project, but I can't find a supplier
 for a larger pulley.Does anyone know of a supplier,
 or have any information on what other pulley might
 work?I have found sites that sell the eccentric
 shaft under speed pulleys but I don't want to
 change that pulley just the alternator.

 Thanks,
 Bob
 Upstate NY

 In the over all scheme of things the speed
 of the alternator should be down on the list.
 Have you some info that suggest the alt.
 will fail if not slowed down?

 Paul Lamar

 Bob,
 I used a 4" alternator pulley from Canton Racing.
 See

 http://www.cantonracingproducts.com/cgi-bin/commerce.cgi?preadd=action&key=7
 3-209

 Mark S.
 Austin

 Mark is using a 20B which has a lower redline than the
 RX8 engine.

 Mark, how is the p-port sealing coming?

 Paul Lamar


 On the subject of pulleys; for redundancy I was hoping to double belt the
 water pump and alternator. I have a dual v-belt alternator pulley but I'm
 having trouble finding compatible dual belt water pump and e shaft pulleys.
 I'd be just as happy with a serpentine belt as a v-belt if only I could
 find
 compatible matching pulleys.
 Jay

 You have a 20B right Jay?
 13B stuff should fit. Check with Mazdatrix or Racing Beat.

 Paul Lamar

 Yes Paul I have a 20B (A991)
 Madatrix does have a dual v-belt main pulley that, assuming it fits, would
 leave me only needing a dual v-belt water pump pulley. So far that's the
 one
 that proving to be the most difficult to locate.

 Jay

 It can always be made. I have a shop here in Santa Paula that
 might make one on an NC lathe for a couple of hundred.
 More than one would bring down the cost.
 Does anybody else want one?


 Paul Lamar

Jay,

I used the crank and wp dual V-belt pulleys from an '89 13B.  I had to grind
off a bit on the wp cartridge to get the pulley to fit without rubbing, but
it has been working fine for more than 150 hours now. Price was right as it
came off a junkyard engine that I had bought to learn on.  Each groove
drives one belt for each of two alternators, but both wrap around the wp
pulley as well.  Worked out pretty well, but I would still rather have flat
multi-v belts, but these were easier to get lined up.

Mark S.
Austin


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