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Looking for HP 93 Igniton control modual

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Old Jan 25, 2019 | 09:00 AM
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Default Looking for HP 93 Igniton control modual

Looking for a Performance ignition control module for my 93 ,anybody might know who still makes one . I have check all the usual places nothing .. Thanks ..
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Old Jan 25, 2019 | 10:52 PM
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May I ask why you are looking for an aftermarket ignition module?
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Old Jan 26, 2019 | 07:00 AM
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I have installed a hotter coil better wires and upgraded plugs so to take full advantage of all the HP parts a better ignition module is in order .. You could find them years back and for the HID stuff can't find one for my 93..
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Old Jan 26, 2019 | 11:53 AM
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Originally Posted by radar502
I have installed a hotter coil better wires and upgraded plugs so to take full advantage of all the HP parts a better ignition module is in order .. You could find them years back and for the HID stuff can't find one for my 93..
What does a "hotter" coil mean?
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Old Jan 26, 2019 | 07:08 PM
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Well that's an old school term .48.000 V .... stock around 36.000 I think . Hotter spark .. "Hotter coil "
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Old Jan 26, 2019 | 09:07 PM
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Originally Posted by radar502
Well that's an old school term .48.000 V .... stock around 36.000 I think . Hotter spark .. "Hotter coil "
The voltage output is the same regardless of what coil is on the car. The coil (any coil) voltage will only rise high enough to break down and arcover the plug gap. It won't go any higher. The 48,000 volt claim is a marketing statement. That's the dielectric/insulation ability of the coils construction. It has nothing to do with what the coil actually puts out to the plugs.

Delco Remy made a good, reliable coil for the Corvette. I'm still using the stock coils in my C3 and C4 (the C4 is turbocharged, and the stock coil and module have plenty of spark capability to deal with the added cylinder pressure during boost).

It's your time and money, but I'd just keep the original coil and module in the system.

There's a sticky in C3 Tech that explains this in greater detail.
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Old Jan 28, 2019 | 10:05 AM
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Originally Posted by radar502
Looking for a Performance ignition control module for my 93 ,anybody might know who still makes one . I have check all the usual places nothing .. Thanks ..
The ICM is basically an amplifier (some people call it a switch). Regardless, what it does is takes the 5 volt P-P square wave pulse from the ECM/ PCM and amplifies it to about 40 volts P-P square wave. The 40 volts is what is required to input to the primary of the coil. The ICM is a solid state device.

I don’t believe anybody makes a ICM with a larger output or a hot ICM. If you want more voltage to the plugs, generally you would get a coil with a different turns ratio in it to get more voltage out of the secondary of the coil. I have never looked for a hotter coil so I can't comment on that.
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Old Jan 29, 2019 | 10:52 AM
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Originally Posted by pcolt94
The ICM is basically an amplifier (some people call it a switch). Regardless, what it does is takes the 5 volt P-P square wave pulse from the ECM/ PCM and amplifies it to about 40 volts P-P square wave. The 40 volts is what is required to input to the primary of the coil. The ICM is a solid state device.

I don’t believe anybody makes a ICM with a larger output or a hot ICM. If you want more voltage to the plugs, generally you would get a coil with a different turns ratio in it to get more voltage out of the secondary of the coil. I have never looked for a hotter coil so I can't comment on that.
What source are you using that states that the module manufactures 40 volts and that the coil somehow needs that?

Also, the turns ratio doesn't determine what the coil output voltage is, Please read the post directly before yours.
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Old Jan 29, 2019 | 12:20 PM
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https://sdparts.com//i-24086724-acde..._content=Brand This is what I am was looking for ,looks like nobody makes these any more .. O-well
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Old Jan 29, 2019 | 12:50 PM
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Can't them anymore ,I know I asked why is Ad. still up . I don't know .. Whatever..
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Old Jan 29, 2019 | 02:11 PM
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Originally Posted by radar502
https://sdparts.com//i-24086724-acde..._content=Brand This is what I am was looking for ,looks like nobody makes these any more .. O-well
Okay, you have me scratching my head here. What brought you to that part number, and why are you wanting this for your '93 (Corvette, I assume)?
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Old Jan 29, 2019 | 02:26 PM
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Originally Posted by radar502
I have installed a hotter coil better wires and upgraded plugs so to take full advantage of all the HP parts a better ignition module is in order .. You could find them years back and for the HID stuff can't find one for my 93..
An ICM is an "on/off" switch, for the coil. Don't see how one on/off switch will turn the coil primary circuit ON and OFF....better than any other. They pretty much either work, or not.

Spend your money elsewhere.
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Old Jan 29, 2019 | 02:28 PM
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Originally Posted by pcolt94
The ICM is basically an amplifier (some people call it a switch). Regardless, what it does is takes the 5 volt P-P square wave pulse from the ECM/ PCM and amplifies it to about 40 volts P-P square wave. The 40 volts is what is required to input to the primary of the coil. The ICM is a solid state device.

I don’t believe anybody makes a ICM with a larger output or a hot ICM. If you want more voltage to the plugs, generally you would get a coil with a different turns ratio in it to get more voltage out of the secondary of the coil. I have never looked for a hotter coil so I can't comment on that.
Originally Posted by 69427
What source are you using that states that the module manufactures 40 volts and that the coil somehow needs that?

Also, the turns ratio doesn't determine what the coil output voltage is, Please read the post directly before yours.
^X2. it's on the ground side of the coil. We've had this discussion before. How does grounding and ungrounding the coil primary circuit make or "amplify" 40v?
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Old Jan 29, 2019 | 02:55 PM
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Originally Posted by Tom400CFI
An ICM is an "on/off" switch, for the coil. Don't see how one on/off switch will turn the coil primary circuit ON and OFF....better than any other. They pretty much either work, or not.

Spend your money elsewhere.
Actually, there are differences. The faster you can turn off the primary current, the higher (peak) voltage that will/can be generated in an inductor. There's some boring formulas that go along with this, but this concept is, in addition to reliability, why transistors are better for switching the ignition coil than a slow opening mechanical points system that also has a further signal slowing BAC (large capacitor) attached to it.

But you are correct that his money could be more efficiently spent elsewhere.
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Old Jan 29, 2019 | 04:20 PM
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I was looking for a ( heavy duty ) one like in the link above and yes I was looking for one for my 93 . The Org. one seem to stop working whenever they want to so years back one could buy a ( Heavy Duty ) one .I think its the heat that takes them out , have had a few just stop working and leave me on side of the road from time to time so one like in the link to me would seem it would hold up long term . It had been years that I owned a C-4 but its all coming back the problems I have had over the years driving one and module was one of them . I used to put HD ones in all my C-4s but I guess can't buy them any more . I drive these C-4 and all my Corvettes at times to the limit any part I can install that is heavy duty , I look for the heavy duty parts . I never know when I might pass a track and just see what this old C-4 is good for .A friend said he thought it might go 150 mph in this old thing ,I never tell. Thanks for all the in put ..
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Old Jan 29, 2019 | 05:25 PM
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Originally Posted by radar502
I was looking for a ( heavy duty ) one like in the link above and yes I was looking for one for my 93 . The Org. one seem to stop working whenever they want to so years back one could buy a ( Heavy Duty ) one .I think its the heat that takes them out , have had a few just stop working and leave me on side of the road from time to time so one like in the link to me would seem it would hold up long term . It had been years that I owned a C-4 but its all coming back the problems I have had over the years driving one and module was one of them . I used to put HD ones in all my C-4s but I guess can't buy them any more . I drive these C-4 and all my Corvettes at times to the limit any part I can install that is heavy duty , I look for the heavy duty parts . I never know when I might pass a track and just see what this old C-4 is good for .A friend said he thought it might go 150 mph in this old thing ,I never tell. Thanks for all the in put ..
Okay, get me up to speed here. IIRC, your original ignition module has four pins (which makes sense to me). The part you referenced has nine pins. I'm not seeing why you are looking for this part.
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Old Jan 29, 2019 | 07:30 PM
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At one time they made four pin as well as nine ,like I said a few years back you could get one of the heavy duty ones for most GM cars .. If one would read the description you can see why I wanted one SUPER HEAVY DUTY unit.. Looks like you can't get them anymore..
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Old Jan 29, 2019 | 08:52 PM
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Originally Posted by radar502
At one time they made four pin as well as nine ,like I said a few years back you could get one of the heavy duty ones for most GM cars .. If one would read the description you can see why I wanted one SUPER HEAVY DUTY unit.. Looks like you can't get them anymore..
I read the description on your link. It just looks like the same description the marketing guys like to put on most electrical parts, as the few details are pretty standard ways these parts are built or calibrated. I don't see anything that's more "heavy duty" than the part that came on your car.

Looking at the part in question, it looks like an ignition module that is made to control distributorless/multi-coil four cylinder GM engines.
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Old Jan 30, 2019 | 07:52 AM
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Agree !!!!!! If you do need more spark current due to whatever run the analog MSD. It's the Marine unit - MSD 6M - fully encapsulated !!!! greg
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