Lister Engines > Things I want to Buy
Generator head pulley
38ac:
Bob, What I have seen tested shows an A belt drive to be 95 to 98% efficiant the variation being due primarily to arc correction factor and HP per belt. Theoretical numbers being what they are it would not be complicated,, however quite time consuming to set up a test cell. My curioisity doesn't go that far ;D
Powdermonkey:
In my experience, I've found two V-belt pulleys supplied with my engines to be entirely out of round. So....put them on the lathe I did, and squared them up (in a V-fashion). All that glitters is not gold. Just be aware that should you endeavor to utilize an Indian V-belt pulley, you might need to dress it up a bit.
If I recall correctly, I've still got the mandrel for performing such a job, and should anybody need such services, I can handle it.
32 coupe:
Years ago, when the "hobby" was at its peak I caught a cast-iron serpentine pulley for my
6-1 set up on ebay. I'm sure it's Indian because it's full of sand casting pits but the bore and
running surface is true and runs a gen head fine at 1800.
I looked everywhere for more of them but haven't seen any. I'm sure I only gave $40 or so for it.
The 25-2 runs a pair of B belts after I gave up on trying to find a serpentine pulley for it at a reasonable
price. Those good quality split pulley set ups are reasonably priced on the bay if you look for open
box or surplus.
BruceM:
I use a serpentine belt on my 6/1, from flywheel (not grooved) to ST-3 serp pulley, but found the belt tension has to be quite high to avoid chirping.
So for my neighbors 8/1 conversion (propane, so a 6/1 at 8/1 rpms), ST-3, I went to a single B belt, which has a fairly good surface area to ride on the flat flywheel, and works well with only moderate belt tension, and saved some cost. No crown/tracking issues with a vee belt either.
I don't believe in meaningful power savings from the serp belt on a single driven device like a belt driven generator. With lots of take offs like on a car sure, serp makes sense.
I think a single B vee belt would do for even an 8/1 diesel.
Powdermonkey:
I've got a spare serpentine generator pulley. PM me for details.
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