Jim,
What you missed is my eating crow in later messages relating to the fact
that I overlooked the water pump and alternator being slaved to the
crankshaft. If the water pump was the driving factor, my theory would be
correct but since it is not, the reverse is true.
Joe
-----Original Message-----
From: spitfires-owner@Autox.Team.Net [mailto:spitfires-owner@Autox.Team.Net]
On Behalf Of jimmuller@rcn.com
Sent: Wednesday, November 29, 2006 4:35 PM
To: spitfires@autox.team.net
Subject: Re: Spitfire Water pump
Joe Curry said:
> So, while I am in the market for a new pump, I decided to
> order one designed for a later car with an alternator
> (larger pulley).
Ummmm, Joe, I'm not looking at my Spitfire right now but from memory and
with the knowledge of just about every other car I've ever seen...
The water pump and alternator are driven by the crankshaft pulley. So
changing the water pump pulley size won't change the rate at which the
alternator is driven, merely slow down the speed of the water pump (and
require a larger belt). If you want the alternator turned faster you'll
need to replace the crankshaft pulley with a larger one.
Or are you suggesting that the belt was slipping over the alternator pulley
because of the angles created by the water pump pulley?
Or maybe I missed something. Or maybe you knew all this already and were
planning to replace the crankshaft pulley. Or maybe you're just pulley-ing
our collective legs. Or maybe this is a quiz. Did I win anything?
--
Jim Muller
!
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