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12-22-2023, 09:57 PM
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#1 |
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Registered User
Join Date: Aug 2017
Location: Edmonton Alberta Canada
Posts: 103
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MSD-6AL with HEI ?
Are we able to add a MSD6AL on a HEI? If so is it worth it ?
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12-23-2023, 07:36 AM
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#2 |
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Registered User
 
Join Date: Aug 2013
Location: anamosa iowa
Posts: 58,278
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Re: MSD-6AL with HEI ?
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"Envy is a declaration of inferiority". Napoleon Bonaparte. |
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12-23-2023, 07:37 AM
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#3 |
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Registered User
Join Date: Aug 2013
Location: anamosa iowa
Posts: 58,278
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Re: MSD-6AL with HEI ?
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"Envy is a declaration of inferiority". Napoleon Bonaparte. |
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12-23-2023, 07:05 PM
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#4 |
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Senior Member
Join Date: Jul 2000
Location: North Texas
Posts: 3,599
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Re: MSD-6AL with HEI ?
Yes, you can add it to an HEI. Hard to say if it's worth it. Depends on what you're looking for. Its advantages are better spark at higher RPMs, and multiple sparks up to 3000 RPM for more complete combustion.
It does mean another point of potential failure, but I've seen them last for a decade or more. Good grounds and spiral wound plug wires are pretty much required. From 6a and 6AL instructions: MULTIPLE SPARKS The MSD produces full power multiple sparks for each firing of a plug. The number of multiple sparks that occur decreases as rpm increases, however the spark series always lasts for 20° of crankshaft rotation. Above 3,000 rpm there is simply not enough “time” to fire the spark plug more than once, so there is only one powerful spark
__________________
Mike 1969 C10 LWB -- owned for 35 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, recent AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. 1982 C10 SWB -- sold 1981 C10 Silverado LWB -- sold, but wish I still had it! 1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 24 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then! |
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12-24-2023, 03:28 PM
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#5 |
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Senior Member
Join Date: Feb 2022
Location: Ca
Posts: 633
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Re: MSD-6AL with HEI ?
Just curious.. once the flame has lit, whats to burn for the subsequent sparks? If it does find a combustible mix, isn't that akin to detonation where the flame is not controlled as the piston drops and you get a ping. It must work or they would not sell. It just goes against how I thought combustion took place in a cylinder. Hurts my pee brain to think about this stuff.
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12-24-2023, 06:33 PM
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#6 | |
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Senior Member
Join Date: Jul 2000
Location: North Texas
Posts: 3,599
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Re: MSD-6AL with HEI ?
Quote:
I always thought detonation occurred before TDC, not after. That's why you can create it with too much advance.
__________________
Mike 1969 C10 LWB -- owned for 35 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, recent AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. 1982 C10 SWB -- sold 1981 C10 Silverado LWB -- sold, but wish I still had it! 1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 24 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then! |
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