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Old 01-19-2021, 01:14 AM   #1
jflogerzi
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coil packs Replacements OEM or Aftermarket

Has anyone with a 2013-2015 FT86 use aftermarket coils while still keeping older stock harness?

Anyone have hands on experience with DELICIOUS TUNING OEM+ coils?
Anyone have hands on with CSG's pricey IP coil packs? As I am re-tuning back to NA with Zach at CSG, noticing some Miss Fires during WOT logging. The car is 7 years old and I plan to track more this year. Should I replace them?
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Old 01-19-2021, 09:51 AM   #2
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How many miles are on the car? Have the spark plugs been serviced recently? Honestly I would ask your tuner what he is seeing and what he recommends, CSG is a good group and will not steer you wrong.
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Old 01-19-2021, 10:29 AM   #3
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I'm curious about this as well. I wanted to buy the IP coils but I'm too afraid of the wiring harness not fitting; I'm happy enough putting gold tape on new OEM coils and seeing how long they last.

At one point, I was even considering drilling tiny holes right there to see if I can get fresh air from the tire into the engine bay, but that brings its own risks. As nice of a reputation DT has, I just can't bring myself to trust them with how short a time they've been around. I'm certain the product is good, I'm just brandwashed and loyal to brands proven over a longer period of time.
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Old 01-19-2021, 02:55 PM   #4
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I'm curious about this as well. I wanted to buy the IP coils but I'm too afraid of the wiring harness not fitting; I'm happy enough putting gold tape on new OEM coils and seeing how long they last.

At one point, I was even considering drilling tiny holes right there to see if I can get fresh air from the tire into the engine bay, but that brings its own risks. As nice of a reputation DT has, I just can't bring myself to trust them with how short a time they've been around. I'm certain the product is good, I'm just brandwashed and loyal to brands proven over a longer period of time.
There's 2 versions, one for each harness. No need to fear
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Old 01-19-2021, 02:55 PM   #5
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Originally Posted by jflogerzi View Post
Has anyone with a 2013-2015 FT86 use aftermarket coils while still keeping older stock harness?

Anyone have hands on experience with DELICIOUS TUNING OEM+ coils?
Anyone have hands on with CSG's pricey IP coil packs? As I am re-tuning back to NA with Zach at CSG, noticing some Miss Fires during WOT logging. The car is 7 years old and I plan to track more this year. Should I replace them?
I've seen many, MANY IP coil packs get used by folks tired of OEM coil packs going bad at the track. Have yet to see an IP coil pack bite the dust.
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Old 01-19-2021, 03:25 PM   #6
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Old 01-19-2021, 03:29 PM   #7
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FWIW I’m trying a few different things this year, namely DEI gold wrapping the coil packs and using the Verus fuel rail and DI ecu brackets to allow more airflow across the coil packs. A few people on the forum have tried one or the other and say they help. Too early to know but I’ll report back with the results. Interested to see what other solutions people have.
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Old 01-19-2021, 06:56 PM   #8
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FWIW I’m trying a few different things this year, namely DEI gold wrapping the coil packs and using the Verus fuel rail and DI ecu brackets to allow more airflow across the coil packs. A few people on the forum have tried one or the other and say they help. Too early to know but I’ll report back with the results. Interested to see what other solutions people have.
I assume you're tracking your car. Do you think that wrapping the header would make sense to help reduce the extra heat that the coil packs are exposed to under the hood?
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Old 01-19-2021, 07:53 PM   #9
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I assume you're tracking your car. Do you think that wrapping the header would make sense to help reduce the extra heat that the coil packs are exposed to under the hood?
Yes track and canyons. I switched to a 2017 OEM header partly because of the OEM heatshielding. If I was still using an aftermarket header, I'd definitely ceramic coat and wrap them. Anything to reduce underhood temps can only help IMO (wrap/coat/heatshielding, cooldown lap, vented hood, opening hood after sessions, etc.)
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Old 01-19-2021, 08:34 PM   #10
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Yes track and canyons. I switched to a 2017 OEM header partly because of the OEM heatshielding. If I was still using an aftermarket header, I'd definitely ceramic coat and wrap them. Anything to reduce underhood temps can only help IMO (wrap/coat/heatshielding, cooldown lap, vented hood, opening hood after sessions, etc.)
OK. Personally I've felt that the engine bay was way too hot even with the OEM header and its heat shields.

I just installed a JDL 4-2-1 that I had ceramic coated and I wrapped to try and reduce engine bay temps. I also used the DEI heat tape on the entire intake tube and box and that definitely helped.

I would be worried about wrapping the coils because they do generate their own heat and I would worry about sealing in some of that heat too.
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Old 01-19-2021, 11:57 PM   #11
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OK. Personally I've felt that the engine bay was way too hot even with the OEM header and its heat shields.

I just installed a JDL 4-2-1 that I had ceramic coated and I wrapped to try and reduce engine bay temps. I also used the DEI heat tape on the entire intake tube and box and that definitely helped.

I would be worried about wrapping the coils because they do generate their own heat and I would worry about sealing in some of that heat too.
Yeah I was worried about that issue too, but I am guessing that whatever internal heat that gets trapped by the gold tape would be lower than the radiant heat from a hot exhaust reflected by the tape. On net should be a win, but just my guess.

I'd love to see a company market heat shields for the coilpacks that go between them and the exhaust components. Seems like it'd be feasible and relatively cheap (certainly cheaper than aftermarket coilpacks or switching to 2015+ wiring harness and 4 coilpacks). I know aftermarket heat shields have been developed for coilpacks on Chevy LS engines for example.
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Old 01-20-2021, 07:17 AM   #12
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I'd love to see a company market heat shields for the coilpacks that go between them and the exhaust components. Seems like it'd be feasible and relatively cheap (certainly cheaper than aftermarket coilpacks or switching to 2015+ wiring harness and 4 coilpacks). I know aftermarket heat shields have been developed for coilpacks on Chevy LS engines for example.
I was going to see if I could figure something out for a heatshield, but I realized that part of the issue is that there's no moving air. Once the heat gets trapped between the coilpacks and the heat shield, it might be even worse for them, so I dissuaded myself.
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Old 01-20-2021, 11:25 AM   #13
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What about a NACA duct on the passenger side of the hood blowing air past the cylinder head and onto the overpipe? That overpipe is what cooks coilpacks. It would be a bit "racecar" but the R34 Skyline has an asymmetric duct.

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Old 01-20-2021, 11:56 AM   #14
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What about a NACA duct on the passenger side of the hood blowing air past the cylinder head and onto the overpipe? That overpipe is what cooks coilpacks. It would be a bit "racecar" but the R34 Skyline has an asymmetric duct.

For anyone driving in the rain, I'd be afraid of introducing a direct water stream onto piping hot exhaust purposefully. I guess it could have a blockoff like the Verus hood vents do. This is probably a great idea for anyone doing track driving.
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