The belt drive sprockets sold for Harley Davidson motorcycles were one of
the few sources I could find.

My conclusion was that the cost of pulleys and belts was high enough to
negate any advantage of designing and building your own. Just buy the entire
drive. That way you get a proven system, that's not going to cause problems.
That is sort of important for an airplane...

http://www.northwest-aero.com/

If you insist on building something, a new process 208 transfer case off a
Ford 4 wheel drive pickup has all the parts for a silent chain drive 400
HP+ - and they can be had free (usually) from the local transmission shop.



"ADK" wrote in message
news:kTlXf.11464$Ph4.6872@edtnps90...
Anyone know of a site where belt drive PSRU plans or design criteris are
explained or offered, specifically for auto engine conversions. Any
sources of aluminum gear-cog pulleys, belts etc.