Best Coil For 1997 7.4L Vortec?

[Nad_Yvalhosert]

Except AC Delco now usually means cheap communist garbage in a Delco box. Delphi is often better quality but still a gamble.

My 80 C10 and 83 G20 both had those stickers.

There's a Delphi manufacturing plant about a mile from my work. Used to be known as Rochester Products... USA is still making GM parts for GM vehicles. That was, and is, my point.

 

[Frank Enstein]

This is the single connector coil also made in USA!

Davis Unified Ignition 31731 Davis Unified Ignition Screamin' Demon Coils | Summit Racing

Free Shipping - Davis Unified Ignition Screamin' Demon Coils with qualifying orders of $109. Shop Ignition Coils at Summit Racing.

www.summitracing.com

 

[wirlybird]

Thanks for the advice.
Going with the
Screamin’ Demon Coil & Vortec Dyna-Module! should get the job done.
Just wanted to replace the original coil with a good one.
These guys actually talk about the large gap plugs so let's see how it goes!

 

[L31MaxExpress]

Thanks for the advice.
Going with the
Screamin’ Demon Coil & Vortec Dyna-Module! should get the job done.
Just wanted to replace the original coil with a good one.
These guys actually talk about the large gap plugs so let's see how it goes!

I have a dyna mod and demon coil that are close to 8 years old back on my L31 based 383. MSD cap and rotor because it was the only brass terminal cap I could find and Taylor 8.8mm thundervolt wires. Actually tried a set of E3 plugs. 383 seems to like it all. Responsive as heck.

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[Schurkey]

Who do you suppose makes those parts for DUI?

It's not like they make them themselves.

 

[BOOT]

A high performance coil alone won't make an improvement, need a demand/mods for a more powerful coil to actually help. As with many things, it's just a new part to replace the old worn part that makes it seem better.

I don't like MSD coils, had a TFI msd coil fail in 40ish miles and it was not in a good place.

Coils were a popular upgrade for old in-cap HEI but often the higher demand w/o a dedicated ground would cause more problems.

There is a thing as coil tuning(different types/specs) but it's mostly trial and error track testing and not high gains. Course these days it's better to have a coil per cylinder.

 

[wirlybird]

I'm going with a Black bear computer and also plugs, wires, cap and rotor.
I'm assuming the coil is original so just wanted to see what might be a good choice other than Delco stock one.
Decided on the Screamin’ Demon Coil & Vortec Dyna-Module.

 

[Schurkey]

I'm assuming the coil is original so just wanted to see what might be a good choice other than Delco stock one.
Decided on the Screamin’ Demon Coil & Vortec Dyna-Module.

Unless there was something wrong with the originals, you've wasted your money.