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hi friends . i posted this in the other thread i have going on this topic.... but my explanation is more germaine to this thread.. sorry for dupes.
to wit:
Reporting in from the field. Based on so many reports of MSD boxes overheating/going bad... i bit the bullet swapped them out for brands new ones, ran all new wiring, . also hooked the friggin little blue alt. wire up to a light. This thing is great! comes on with ignition on, ( as i have it wired) . Then when alt. kicks in at start it goes out. . very nice indicator to have on dash! ..
at 3000rpm in my garage i get 14.7 volts across the battery terminals., so to me, the alt. is working.
unfortunately . does not seem to have solved any problem... engine still misses and backfires up thru midrange. i do not yet know if it will cut out after a few track laps... but will see on tuesday.
i also checked fuel flow thru and past the pmo regulator and into the carbs. all is fine. no blockages. good fuel in pmo windows.
at rest in garage, i have AIM afr readings of 16-17. at odles . 1000rpm... they go down to 13-14 when revs are up to 3500 or so. but this still seems high. at that rpm. motor is still backfiring.
These are lumpy race cams along with 12.3 hi comp motor. not sure this makes a difference.
i am at a loss as to what to do next if this does not solve. cap, rotor, wires?
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