umm lets see here. opened a can of worms . stamped on the bottom side of
the point cam is a number wich refers to how much advance it will
mechanically allow. i was told this years ago during r&d on the gutekunst
fabricators spridget wich won the scca runoffs at road atlanta in 79. we
had about 15 possibly even 20 used distributors in a box. i was doing my
engine for autocrossing and wanted a hot cam that had really poor
vaccume(norris cam). i asked about buying a mallory dual point and was told
" why"? just disconnect the vac advance and plug the source. then replace
the point cam! at that point in my life i was driving my sprite evry day
switching off with my radical 56 chevy street racer. so changing the point
cam sounded like martians to me but what the heck! i was handed the box of
distributors and was told tear them apart untill you find the highest number
stamped on the bottom of the plate on the point cam. so i did! it was 26
or 27. after installing it in my dist. we fiddled with a color tune to pick
the right combination of jets( i swear that is some kind of black art) and
ditched the timing light and proceeded to road test it like tuning an old
chevy! advance untill ping and retard it a hare....done! took an afternoon
to do but never followed the book again. now the engine is highly
modified. causing some discrepency in the set up compared to stock. but
it does run well with either the weber or the su set up on it. i wish i had
a listing of what year/engine or dist. stamping number contained what cam.
but that is how i learned to set up my stuff and it works well. also use
lucas comp. set of points too. nothing special like machine work needed
just the right combination of parts flying together in close formation.
chuck.
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