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RichardJ · 04-04-2015, 12:02 AM

>> HEI Modules will burn out if not given their full 12 volts.<<

That is not, I repeat, not true.

About 15 years ago I installed an HEI with coil-in-cap. When I added the AC, I changed it to the '75 inline six type with the externally mounted coil. I wanted the extra clearance so that the compressor could be a little lower.
Both distributors for all these 15 years have been running with the original ballast resistor installed. Voltage measured at the Bat input to the coil is only a little more than 2.0 volts lower than actual battery voltage. 14.5 volts at the battery will provide an actual 12.0 volts at the distributor.

04-04-2015, 12:02 AM	#26
RichardJ Registered User Join Date: Apr 2010 Location: So Cal Posts: 1,417	Re: 292 engine upgrades questions >> HEI Modules will burn out if not given their full 12 volts.<< That is not, I repeat, not true. About 15 years ago I installed an HEI with coil-in-cap. When I added the AC, I changed it to the '75 inline six type with the externally mounted coil. I wanted the extra clearance so that the compressor could be a little lower. Both distributors for all these 15 years have been running with the original ballast resistor installed. Voltage measured at the Bat input to the coil is only a little more than 2.0 volts lower than actual battery voltage. 14.5 volts at the battery will provide an actual 12.0 volts at the distributor. Attached Images __________________ '67 GMC 2500, 292, 4spd, AC Last edited by RichardJ; 04-04-2015 at 12:17 AM.