There is a higher voltage which will carry more current to the plugs. You need spiral wound wires to carry it though. The difference is at higher rpm. Less chance of miss fire. This actually works better in a motor that that has higher compresion.
I have the SD coil. Bought at discount from another memeber.
I cant say if there is an performace or mpg improovement. Never dyno'd or check mpg.
What I have always prefered, along with a hoter spark. Is elctronicly controled dwell. That would give the coil more saturation time. Which would increase the duration of the spark. That I know of, not available for our tracs.
I had a crane cams electronic ignition on my '94 stang in my library. I did get some torque and HP, on the dyno, 3000rpm up to red line.
The electronics is the gold box on the firewall, next to the brake booster. The lower resistance hoter e-coil is under the chrome cover up front, by the power steering pump. Of course this was the 302 with mechanical distributor. Not sure if the DIS system can be programed with an xcal for longer duration spark.
I was pushing 376 RWHP and 400 tq on the stang. Naturally asperated. Started with a base 302 cobra motor. To many internal mods to list.
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