Seat to seat timing means more to cranking compression than .053 timing, also, did you check both of the cams degreeing? It too may vary and cause your symptoms. Or a combination of both. Andrews cams typically have lazier ramps than the V-Thunder cams too. Same deal. Briggs & Stratton "easy spin" starting cams use a late intake closing of seat timing to effect lower cranking compression. Once started, the long slow intake closing ramp means less to the running power band. Outboard motors in the old days before electric start also used the same method, as the early Evenrude/ Johnson "performance" engines (28 and 35 HP) started to use higher compression to make more power. Prior to this they were a mother bear to start. They were 2 stroke engines, but the same principle was applied to cylinder porting. TIMINATOR
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Topic: Why the lack of published cam specs (Read 5823 times)