Originally Posted by
John_M_
The valve opening closing would be similar... If thats all the differences between the two cams is just the timing mark, then its unusually for the $10 price difference between the two... the 200Ti front cam is from the left side cam of the odd fire 182 twin, that cylinder's valve timing / cam profile is the same as a single cylinder... the 200Ti rear cam could very well be just the timing mark reference index, but I believe there is a difference in valve opening closing timing by a few degrees between the two cylinders... Degree the front valve timing with the cam set on its timing mark in reference to TDC, and then rotate the crank counterclockwise 360 degrees (prop rotation) and see if you can dial in (degree) the rear cam valve open closing in degrees and disregard the cam timing mark, if you can't then the cam profile, valve opening closing, duration and overlap will be different between the two cylinders.
No sir, the right cylinder of the 182 uses the same cam as the singles. But, but, BUT, you brought up a good point, the 182 is ODD fire. I failed to remember that. Things are beginning to make sense now.
I installed the 200ti rear cam into the front cylinder using the cam indexing hole, just in case the previous owner swapped them. The crank angle was 180° off.
Just for curiosity sake, I will degree both cams again, this time using a more accurate "final word" indicator (.0001"). The .001" indicator I used for previously measurements is not accurate enough to detect "a few degrees" difference in crank rotation.