Hot rodding the HEI distributor
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A final word about that HEI "module:" Lotsa mystery around this little "thingamajig." This is just the little electronic brain located on the floor of the distributor housing with 4 wires going into it (2 per side). All it does is read the magnetic pickup signal from the magnetic pickup assy. around the distributor shaft and then using this reference signal, tell the coil when to fire and with how much "dwell". I always recommend a good stock GM module, not a parts-store cheapie. No reason to go crazy and get one of those $70 “super-high output modules here”- I have tried them and they do nothing for performance. But get a genuine GM one. Stock GM modules incorporate what they call a "variable dwell" circuit that reduces dwell at lower RPMs to keep the coil from over-saturating. This is good for sharp performance and long coil life. Some parts-store modules don't have this circuitry in them. | A final word about that HEI "module:" Lotsa mystery around this little "thingamajig." This is just the little electronic brain located on the floor of the distributor housing with 4 wires going into it (2 per side). All it does is read the magnetic pickup signal from the magnetic pickup assy. around the distributor shaft and then using this reference signal, tell the coil when to fire and with how much "dwell". I always recommend a good stock GM module, not a parts-store cheapie. No reason to go crazy and get one of those $70 “super-high output modules here”- I have tried them and they do nothing for performance. But get a genuine GM one. Stock GM modules incorporate what they call a "variable dwell" circuit that reduces dwell at lower RPMs to keep the coil from over-saturating. This is good for sharp performance and long coil life. Some parts-store modules don't have this circuitry in them. | ||
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