Coil on plug

['87 Turbo "T"]

Hey everyone. Being that it's almost 2026 is there someone that offers a coil on plug set-up?

I know Bailey offers a harness(not sure about brackets) for the TR6 & Cruz offers brackets, wires etc. I've read here Hartline used to offer some things.

However is there anyone out there offering a coil on plug set-up's for our Buicks. Any ideas or links would be appreciated. Thanks!

 

[Turbo6inKY]

You can run coil on plug with the ECUGN and this harness: Coil Near Plug Adapter Harness - LS Coils-4004

 

['87 Turbo "T"]

You can run coil on plug with the ECUGN and this harness: Coil Near Plug Adapter Harness - LS Coils-4004

Well dammit! I’m running the MS3. I may have lead on a harness there though.

Not looking to put the coils on the valve covers so this might be a piece by piece plan. I know I can get coils locally. Just need harness, brackets, & wires.

Any way to set coils back by stock ignition location?

 

[Turbo6inKY]

Well dammit! I’m running the MS3. I may have lead on a harness there though.

Not looking to put the coils on the valve covers so this might be a piece by piece plan. I know I can get coils locally. Just need harness, brackets, & wires.

Any way to set coils back by stock ignition location?

Boost Crew Motorsports makes a plate and spacer system that stacks the LS coils where the stock ignition goes, been running it for several years now.

 

['87 Turbo "T"]

Boost Crew Motorsports makes a plate and spacer system that stacks the LS coils where the stock ignition goes, been running it for several years now.

View attachment 408804

Very cool! I didn’t see it on their page. I will call them this week.

Thanks! I can start laying some groundwork to see how I can make a set-up work for me.

 

[BEATAV8]

These cars have ECUGN set ups. IGN1A Coil brackets are from Bison and have some spacers added for positioning.
The ECUGN COP harness will not work with an MS3. The MS3 is not set up with the extra connector on side of the case.
With an MS3 you would need to use a TR6 for COP. Just a matter of placement of the various items.

 

[Turbo6inKY]

The MS3 is not set up with the extra connector on side of the case.
With an MS3 you would need to use a TR6 for COP. Just a matter of placement of the various items.

You could get a microsquirt and hook it up to the MS3 PnP over CANBUS as an I/O extender and use its extra outputs to drive coils.

Don't know if anybody's done it, but it's possible on paper.

 

['87 Turbo "T"]

These cars have ECUGN set ups. IGN1A Coil brackets are from Bison and have some spacers added for positioning.
The ECUGN COP harness will not work with an MS3. The MS3 is not set up with the extra connector on side of the case.
With an MS3 you would need to use a TR6 for COP. Just a matter of placement of the various items.

View attachment 408806View attachment 408807

There’s a guy out there that can make an MS3 COP harness. It goes into the AUX connector they send with the MS3 for sensor grounds & such.

Then normal grounds to each cylinder head & ya can get a clean voltage source from the PM plug(I have vacuum brakes) so the plug is just taped up.

I’m just now delving & I know not many here run the MS3 but I should have more info over the winter.

 

[THensley]

Hear is what I did I used the TR6 truck coil wires in stock location

 

['87 Turbo "T"]

Is there any major benefit to going COP vs using the TR6?

I have my mind made up, I’m just wondering. People seem to like the COP set up better than waste spark.

 

[william B.]

Im running fast xfi with tr6 and ls cop, i noticed the idle cleaned up and sounded cleaner,resistance on the spark plug wires went to zero, and thought trouble shooting and replacing just one coil would be easier. been running this set up around 10 years so far no problems.

 

[BEATAV8]

Is there any major benefit to going COP vs using the TR6?

I have my mind made up, I’m just wondering. People seem to like the COP set up better than waste spark.

Good question. On paper the IGN1A coils are more powerful but in practice the car ran excellent with the wasted spark truck coil and runs excellent with the COP. She runs cleanly right on up to 6700rpm with either coil setup. No appreciable changes to fueling necessary.
Pushing the tune to more aggressive settings might reveal a difference where the IGN1A coils can light off a mixture that the truck coil might struggle with.

 

[THensley]

TR6 was a supper setup COP was because I went Holley and it was easer to sell the TR6 complete.
I had a real peace of junk for a OE harness

 

['87 Turbo "T"]

I’m just having a bit of an issue with the TR6 & the MS3 when it hits a safety(AFR, boost, etc) it’ll cut spark for that hot second. The TR6 doesn’t understand why it sees loss of spark, & goes into limp mode.

Have to cycle key to clear. Nothing wrong with the TR6 it just doesn’t understand a bit fancier ECU.

So I’m planning to do a “home run” so to speak, MS3 direct to COP set-up. Then forward the TR6 to someone who can use it.

 

['87 Turbo "T"]

Good question. On paper the IGN1A coils are more powerful but in practice the car ran excellent with the wasted spark truck coil and runs excellent with the COP. She runs cleanly right on up to 6700rpm with either coil setup. No appreciable changes to fueling necessary.
Pushing the tune to more aggressive settings might reveal a difference where the IGN1A coils can light off a mixture that the truck coil might struggle with.

I’m running a 6262, 120# injectors, 21#+ boost on E85 so I’ll be making a decent amount of power. Seems like the D510C can handle it…….

 

[Mr.Spool]

Is there any major benefit to going COP vs using the TR6?

I have my mind made up, I’m just wondering. People seem to like the COP set up better than waste spark.

No

 

[GNVYUS 1]

On our platform Beatav8 and Spool got it right, not necessary but if you wanna swap it'll run. What coils to run seems more based on total psi and rpm because.....

In the Talon/Evo world where 9500-11,000rpm and 40+psi is common, most are IGN1A and there's a new coil the big boys are moving too. No truck etc coils on those cars.

 

[TurboTGuy]

These cars have ECUGN set ups. IGN1A Coil brackets are from Bison and have some spacers added for positioning.
The ECUGN COP harness will not work with an MS3. The MS3 is not set up with the extra connector on side of the case.
With an MS3 you would need to use a TR6 for COP. Just a matter of placement of the various items.

View attachment 408806View attachment 408807

Dang! That's purddy. Where are the fuel rails, or am I just old and blind?

 

[BEATAV8]

Dang! That's purddy. Where are the fuel rails, or am I just old and blind?

They're hiding under the coil brackets. Note the regulator in the stock spot.
Plenum has an angled cruz spacer to move it up (and throttle cable bracket along with it) to make space for the brackets. Coil brackets share the fuel rail bolts.

 

['87 Turbo "T"]

Boost Crew Motorsports makes a plate and spacer system that stacks the LS coils where the stock ignition goes, been running it for several years now.

View attachment 408804

Boost Crew Motorsports makes a plate and spacer system that stacks the LS coils where the stock ignition goes, been running it for several years now.

View attachment 408804

I talked to them Monday, wasn’t sure if he had one & he said he’d get back to me, texted & left a message. Haven’t heard back. Told him I’d be more than happy to purchase it or buy one if they had to have them made.

Wonder if anyone else sells a stock location set-up.