Crank pulley degree calculation

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pinzinator
Posts: 917
Joined: Thu Jul 29, 2004 3:12 pm
Location: Indio, California

Crank pulley degree calculation

Post by pinzinator »

I measured the diameter of the Pinz crankshaft pulley with a dial caliper, and came up with 6.425". That converts to 163.2mm. Multiplying that by pi to the 5th decimal equals a circumference of 512.71mm. Divided by 360 degrees, it figures out to 1.42mm on the circumference of the crank pulley equals 1 degree. This means that a timing mark at 14.2mm BTDC would equals 10 degrees advance timing, 28.4mm equals 20 degrees, etc.
The manual calls for 2-3mm advance at idle, this would equal about 3-4.5 degrees in timing.
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