I bought a Burton BF134 camshaft which came in Kent box (however got a "bf134" stamp on the back), they advise such figures:
Valve Lift: 0.460"
Duration: 266°
Timing Figures: 23/63/63/23
However I tried to measure these figures and got different results. I set valve clearances as required, used 0,25mm checking height and at first 0 deg on cam pulley. The results on inlet were 12/71. Then advanced 4deg and got 20/63. the duration is very similar to Kent FR34. Then advanced to 5 deg on cam pulley and got 22/61 as it should be on FR34, but the exhaust showed 62/6. So the exhaust duration is only 248 deg??? Am I missing something while measuring, or something is wrong with the cam? Valves are standard by the way so the rocker geometry should be fine.
Also I checked the valve lift, my indicator cannot measure that precisely but I got definitely more than 11,8mm which is more than it should be on BF134. It looks like this cam is more similar to Kent FR34 but exhaust duration is quite short (checked on 3 cylinders). Now I'm not really sure how to set cam pulley as well.
Thanks,
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