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[TR] Drive pulley size reduction, thin belt H2O/Amp speeds

To: Triumph List <triumphs@autox.team.net>
Subject: [TR] Drive pulley size reduction, thin belt H2O/Amp speeds
From: Dan Cronin <adcronin@mi.rr.com>
Date: Wed, 26 Jan 2011 19:45:05 -0500
1/26
I recently purchased a ATI Damper only to discover that the drive pulley hub 
that comes with it is appro. 3-5/8" diameter at outer lip vs. the Alloy thin 
belt damper/pulley's appro. 5-1/8" diameter (stock pulley was appro. 5-1/2").
The thin belt water pump pulley is appro. 4" at outer vs stock's appro. 4-1/8, 
so no diff. there.  The thin belt alternator pulley is appro. 2-3/4" outer, vs 
stock generator's 3-1/4".  Since output is apples to oranges between alternator 
and generator am wondering  if there is a consensus on what speeds the 
alternators should run at---am using a Delco 63 amp unit.  Am also wondering if 
the slower speed that the water pump will run at will be a problem as I am 
going to be using the six vein aftermarket pump in alloy housing and running an 
12" electric fan.  Thoughts?  Suggestions?  Other's experiences?
Thanks, Dan
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