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BUSY BOLTERS Are you one?  The Shop Area
continues to pull in the most views on the Stovebolt. In August alone there were over 22,000 views in those 13 forums.
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Jul 21st, 2025 | | | | Joined: Feb 2004 Posts: 28,674 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 28,674 | The most stressful time on an HEI system is cold weather cranking when the engine might be turning slower than normal. A HEI coil primary has around 1/2 Ohm of resistance, so the initial surge current in the primary winding will be somewhere in the 20 amp range or so. Once the inductive reactance of the primary develops, the primary current will drop a bunch each time the module closes the circuit. The primary circuit needs to be sized to handle that surge current, so a relay would be a god idea. I've started using 60 amp Bosch type relays instead of 30, not because most circuits need the extra amperage but just because the connectors that come with the relays have bigger wires. The cost isn't that much more for the bigger relays.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Dec 2018 Posts: 2,451 'Bolter | | 'Bolter Joined: Dec 2018 Posts: 2,451 | Greg Brown A friend with a high winding 327 would use 2 of those springs to attain 8200 RPM. We learned to use AFB's on Carter WCFB manifolds too. The local backwoods junk yard had plenty of mopar AFB's 2121s worked good. | | |
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