What is an ignition module?
Thread Starter
Advanced
Joined: Feb 2015
Posts: 75
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From: Albuquerque New Mexico
What is an ignition module?
I see it in the eckler catalogue is this like a hi performance thing? Excuse my lack of wrenching smarts. Shuld I put one in or say screw it?
Also the MSD box? Is it a hoax? Any proven HP gains or just a hotter spark?
Also the MSD box? Is it a hoax? Any proven HP gains or just a hotter spark?
Melting Slicks
Joined: Sep 2010
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unless yours is bad & needs replacing. Like a decal. It's for show.
a MSD box can boost your spark. I did have a much better response with with my hyfire 685 vi
Race Director
Joined: Apr 2002
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From: Anaheim CA
Team Owner
Joined: Sep 2003
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Fortunately for most users there's no need for the "internal" schematic of a component that has no serviceable components.
For the OP - if it runs well you can certainly overlook most/many of the items you might come across.
I generally rely on FSM's for wiring but there's some references here that are used frequently:
http://chevythunder.com/hei_troubles...ge_2_coil_.htm
An image that says "Compliments of GM":
Last edited by WVZR-1; Feb 24, 2015 at 07:42 AM.
Melting Slicks
Joined: Jan 2008
Posts: 2,054
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From: AZ
The good advice I got from a long-time Corvette tuner is simple. Avoid the complexity as Multi Spark Discharge is only helpful above 7000 rpm or with forced induction. My car has neither and runs strong and hard, all the way to 6300 rpm shutoff; with 'only' an HEI. Just ensure that you use a quality ignition modue, as quality has become spotty. Last time, I bought three 'old' stock, as insurance.
The spark used is only that required to fire the plug and is actually about the current flow, not voltage. Voltage is the 'potential' to jump the gap and current is how thick that arc is. Higher compression demands for more current and higher RPM gives the unit less time to recharge for the next firing.
The spark used is only that required to fire the plug and is actually about the current flow, not voltage. Voltage is the 'potential' to jump the gap and current is how thick that arc is. Higher compression demands for more current and higher RPM gives the unit less time to recharge for the next firing.
Advanced
Joined: Apr 2014
Posts: 61
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From: Rolla Missouri
The ignition module is a necessary electronic part to make your car run. It is underneath the distributor cap. Buy a spare and keep it in your car along with the tools to change it. It WILL go out eventually and probably at the worst possible time and location.
Last edited by sjarrett71; Feb 28, 2015 at 05:00 PM.
Team Owner
Joined: Feb 2006
Posts: 23,218
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From: San Antonio Texas
Forget the high voltage multi-strike hype and stick with your HEI distributor module. It's plenty strong for most anything but NASCAR power requirements. The extra high voltage multi-strike boxes just prematurely wear out/burn the rotor tip and cap contacts anyway and create a huge amount of corosive Ozone gas inside the cap area leading to arc-overs and misfires later down the road.
In my experience MSD stands for Mostly Sh!ty Devices anyway.
In my experience MSD stands for Mostly Sh!ty Devices anyway.
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