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Old 09-09-2010, 05:23 PM   #24
dorkpunch OP
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Joined: Aug 2006
Location: Blackfoot, ID
Oddometer: 5,373
Rainy day, so I played a bit more. Had the top end off to hone and re-ring, figured that was a good time to degree my engine. Here's what I came up with:

printed a degree wheel of the internet, cut it out, and bolted it on to the crankshaft. Used a cheapo laser pointer set on the engine to light the degree, set the wheel to zero with the piston at top dead center. Kinda hard to see, but if you look close you can see the red dot at the 0.

Rotated it through, noting the degrees that ports opened and also the duration. Had to take the cylinder and piston back off to see the intake to get the degrees for the rotary valve.

Heres my digitized version. Not sure if its right, seems a little wonky compared to some that I've seen:


"I've been going to this high school for SEVEN YEARS. I'm no dummy!"
-Charles De Mar.
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