Just an input as an EE ,= follow the instructions to the letter . The coil EE driven parameters they play with , in the aftermarket , actually will reduce performance ( low resistance primary .. that is for CD ( msd)— not points, not for most electronic ignitions ) . High ratio / high volt coils will directly reduce the current in spark = weak spark . Think of welder amps , same deal . Product of volts and current ( watts) is ALWAYS constant ( watts or joules, aka power in the output ) so your hv coil=weak spark, due to less current . It only takes 20 kv at the spark plug to do it ,Factory is 30-35 k v . plenty extra . A .high current spark burns long and hot .. welder again . . to think we know more about optimizing the coil , than say GM , speaks for itself . Dead wrong . 95% BS to open your wallet. Many do . Like pills to make you 17 again , some believe it, swear by it.etc etc
. Old coil may be defective ( shorted from running or “ testing spark” with a plug wire off— that kills coils) or likely a bad “ new capacitor” . New ones are intermittent junk . Keep your old Mopar one , with copper strap , test it .
GM has a sophisticated automatic dwell control in HEI , cuts dwell at low rpm , to limit current . So no ballast R . Chrysler uses ballast R . GM gives about 7 amps , Chrysler 6 , with correct coil ohms , about the same spark . HEI is a little better way, maybe . But not huge . Purpose of both is to avoid a way too high current at idle , while still allowing the designed current in the coil at high rpm . You mess with that ( remove ballast) to raise current you will burn out coil if correct one , ( at idle!). no or little gain at high RPM ( why is complicated , for another day .. involves limited time between sparks to fill up the coil -or inherent L/R time constant.. why 8000 rpm drag racers go 16 volts— or CD ) ; with no ballast resistor , or wrong coil you WILL pop electronic ignition or burn up your points, overheat coil. Sooner or later . At idle .. probably on a hot day in traffic . Ballast R is for reducing current at idle, not for reducing designed correct current at high rpm . Last I looked increasing idle spark is not a problem . Current is on in coil a long time between sparks at idle .. relatively . Measuring volts on ballast and making pronouncements all wrong too , as drop is going on and off , meter averages it . Meaningless measurement ... . It is not “ dropping 6 volts” even though that is average . Pertronix goes through the trouble to make 3 different coils . Think . Why is that ? Answer is : They match various electronic designs . Now this : IMHO, actually a fact, all older electronic ignitions lose a volt in the main switch transistor so your 13 v now becomes 12 v . Why the heatsink on the orange can . Spark energy in coil is 1/2 L I squared. I in coil is proportional to V . So merit figure = for electronic is (12 sq) 144 , points (13 sq) 170 . Points ARE that much better , = 20% hotter spark . .. for same correct coil .we went 140mph in 300’s on points. Did not skip ... * I have always been able to go no matter what —with points , setting is good for 10-20000 miles . Pertronix , you walk . And many in club have . Probably due to no ballast or “ Hot coil” etc .. also wiring that start jumper setup often done wrong . .. Just sayin ; BS baffles brains , you can screw up your car . John PS very rarely can people set up overlapping dual points right on , correctly . Not as easy as it looks . They move as you tighten screw. You need a dwell meter . “Problem with points” = 90% is who is holding the golden screwdriver , slightly off , it misfires badly at higher rpm . Don V does it right . * anecdote , at test of a 354 hemi on dyno at PK Machine , Fitchburg Ma— one of top race builders in country , 800$ worth of fancy MSD on it . About 380 hp . MSD died on the dyno (!) ( still looked real nice) , owner ran out to car trunk got stock 300B distributor to continue test . Guess what ? — 380 hp , no breakdowns to 6000. Made my day . Sent from my iPhone not by choice On 25 Apr 2020, at 12:56 am, John Sager cleanthegarageout@xxxxxxxxx [Chrysler300] <Chrysler300-noreply@xxxxxxxxxxxxxxx> wrote:
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