subadude. i.m using a stock CDI for my 3 cyclinder car equipped with negative ground alternator. i actually did what you did by connecting one end of 3 arrays of diodes (25 pcs in each array- each diode is rated 6amps ) all together to one wire that goes to coil primary + terminal. the Other end of each array/block to each plug wire tied in at plug terminal. unfortunately i got no plasma spark. what i did instead was connect the other end to my plasma circuit with 10uf 400v charging cap and 2.2 uf booster cap. this circuit is powered by an inverter. what i want understand is how were you able to produce plasma spark with that simple connections. do you think using an MSD instead of a stock CDI made a difference? (sorry for my English, i am from Philippines).