Join Date: Jun 2001
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Re: TR Ignition upgrade Spark plug ?
Well, . . . .045 really isn't the right gap, the right gap is .035. Changing to the TFI coil gives very little voltage increase unless you eliminate the resistor wire and upgrade the module (which I didn't.) What's happenning is that the voltage is marginally enough for the larger gap. Platinum is less conductive than copper, and adds enought resistance to make it miss every no and then.
I've since added an MSD6 module, which does produce more voltage at the coil secondary, and I can run the plugs as high as .055 without any problems.