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So here is my question
When the Engine was built was the cam degreed in , over the years guys have complained about performance with aftermarket cams and gears but have never checked cam timing.
An advanced cam needs retarded ignition timing , a retarded cam needs advanced ignition timing.
If it wasn’t checked your guessing on everything.
So if you haven’t checked it you probably will be tuning by ear.
Not that tuning by ear is a bad thing especially since every Engine reacts differently and altitude with fuel mixture can change what works for one Engine and not another.
Make one change at a time and see what the results are before you go crazy.
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