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Well I was wondering Which coil would work better with my msd 6al and Hei distrib. here is how they compare blaster two listed above the ss.
Resistance
0.700 ohms
0.355 ohms
Maximum Voltage
45,000
40,000
Peak Current
140 mA
300 mA
Inductance
8.0 mH
6.9 mH
Secondary Resistance
4.70K ohms
4.40K ohms
Spark Duration
350 uS
220 uS
Turns Ratio
100:1
70:1
trenchdog, in the dyno tests I've seen, there was hardly any difference (less than 5 hp) between the double-throwdown, mega-joule, cadmium-plated, goat-bladder, double-Johnson rod models of distributors/coils and a standard, off the shelf points distributor with Autozone coil, so I doubt it's gonna make a nickel's worth of difference.
I'm going with Tech on this one. Don't really see why it would possibly matter unless you were looking for thousands of a second in competition. I guess I would go with either whichever one was cheaper or prettier.