Tuning with jets, Power valves and an O2 guage

srixon4406 said

Get a assortment of pump cams for off idle issues. Also make sure your rear throttle blades are adjusted properly. Any time you make a timing change the carb is going to need to be retuned. Power valve and jets don't come into play till after the transition period.
Aaron

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THIS...........Lots of people buy into the 1/2 pv of idle vac bs and it means nothing if the carb`s set up correctly on the idle circuit. Even if it`s open which a low pv would be it`s not coming into play until you`re in the cruse/power circuit and into the boosters. The proper way to tune pv`s is to hook up a vac gauge and check your cruise vac and in my case 9-10'`s and get the pv to be under that amount according to how fast you want/need the enrichment.................that`s the short version. Peace!