Re: Another HEI Application

Posted by Jack Vines On 2008/6/30 20:43:08

Hi, Loyd,

I talked to a GM engineer and asked exactly that question, "Why don't OEMs use the Jacobs and/or MSD technology in their ignitions?" His answer was, "Because it isn't necessary with current EFI and spark control. An older car, with the carb not calibrated correctly and a wobbly centrifugal/vacuum distributor, especially if it uses oil, might need more than one spark to light a wet fire, but when the A/F ratio is as it should be, one spark at the right time is sufficient."

thnx, jack vines