My '71 GT6 has a Crane XR-700 ignition system. With the engine running: alternator voltage is 14.2v, voltage into ballast resistor is 13.8v, voltage out of the resistor is 9.2v. Ballast resistor read
Message text written by aribert running: alternator voltage is 14.2v, voltage into ballast resistor is 13.8v, voltage out of the resistor is 9.2v. Ballast resistor reads 1.7 ohm (catalog rated at 1.3
Two things here: Second, the Crane should be wired to take it's voltage from the vehicle power source, *NOT* the positive side of a coil that's wired to a resistor. Move the Crane positive wire to th
I know what the manual says, but it's wrong. Why would you wire it directly to +12 for units without resistors and to the varying voltage on the other side of the resistor on units with one? The igni
Right. They've only been making these things for 20 years, and their manual still has such an obvious mistake in it. I'd like to suggest that, in the case of the Crane XR700, it actually makes no dif
Sorry Randal, but power is used to drive the ICs in the unit as well as supply voltage to the base of the transistor that turns on the coil. The ICs, if they're anything like those in the Piranha ign
Message text written by George Richardson supply voltage to the base of the transistor that turns on the coil. The ICs, if they're anything like those in the Piranha ignition system, require a minimu
Well, assuming it has ICs, that's exactly what I meant by "the amplifier for the signal". Right, unless of course they are CMOS equivalents, good to about 3 volts. And they would also require a modes
It sounds a lot like we are getting to the point of trying to "one up" each other, and on the verge of getting nasty. There are numerous rather large books and fields of study that could be applied
What a concept??? People on this list actually working together on a solution rather than trying to prove that the other people offering inputs don't know what they are talking about. :) Joe
I'm sorry people, someone asked for help, I gave my opinion based on years of experience and the use of 2 Crane systems myself and 2 installed for others. Someone else felt he needed to attack me for