[D CHOI]

I have about 43k miles on my car but haven't replaced my ignition coils yet. I've read somewhere with tuned car would need to change sooner at 30k miles.

My car hasn't been sounding right and I'm think ing maybe it could be the coils. I've been chasing this issue for awhile and recently fixed my resonator crack which felt like it muffled the sound more. Would need to go back for follow up.

I'm running bm3 stage 2. I also have the colder spark plugs. Does anyone have recommendations for what coils I should get?

here is link to my sound issue.
https://f87.bimmerpost.com/forums/sh....php?t=1784220

[ZM2]

Eldor’s are the new BMW spec, vs Delphi. These have been running strong for me: https://www.fcpeuro.com/products/bmw...or-12138657273

[D CHOI]

Originally Posted by ZM2

Eldor's are the new BMW spec, vs Delphi. These have been running strong for me: https://www.fcpeuro.com/products/bmw...or-12138657273

Good looking out especially with fcp euro! How many miles did you change yours at and were you getting codes?

[ZM2]

Originally Posted by D CHOI

Good looking out especially with fcp euro! How many miles did you change yours at and were you getting codes?

I changed mine at 36k miles.

My issue was actually due to gapping my plugs too tight at 0.020”. However, the Eldor’s were strong enough to make the misfires almost go away completely and were doing much better than the stock Delphi’s which had tons of misfires with that gap.

Opened gap to 0.026” afterwards and no misfires since with the Eldor’s and 442whp.

[D CHOI]

Originally Posted by ZM2

I changed mine at 36k miles.

My issue was actually due to gapping my plugs too tight at 0.020". However, the Eldor's were strong enough to make the misfires almost go away completely and were doing much better than the stock Delphi's which had tons of misfires with that gap.

Opened gap to 0.026" afterwards and no misfires since with the Eldor's and 442whp.

Nice. I'm gapped at .023 from the recommended specs by bm3.

I just noticed the site doesn't show it fits for the M2?

[ZM2]

Originally Posted by D CHOI

Nice. I'm gapped at .023 from the recommended specs by bm3.

I just noticed the site doesn't show it fits for the M2?

Says that, but FCP Euro doesn’t have their fitment guide up to date. It fits, check out the reviews.

[AWC-F87]

Could always upgrade to the precision race works coil pack setup and send it

[F87source]

Originally Posted by AWC-F87

Could always upgrade to the precision race works coil pack setup and send it

No, wait for the b58 coil kits for the n55. That's a way better coil, more spark energy and less strain on the modules inside the ecu responsible for the coils.

[-Eidos]

The thread to follow for the B58 coil kit: https://bit.ly/3qOTSMt

[ZM2]

Hot damn. I’m curious how much more those B58 Eldor’s put out vs the Eldor’s I bought?

[F87source]

Originally Posted by ZM2

Hot damn. I’m curious how much more those B58 Eldor’s put out vs the Eldor’s I bought?

https://www.spool street.com/threads/ignition-coil-secondary-spark-energy-comparison-n54-n55-b58-and-pr.7169/ (remove the *******

At the same dwell of 3.0 ms almost double, at higher dwells a little less. But you don't want too much dwell as IGBT temps will get really high which is not good.


Honestly though, if you don't have to gap down your plugs to an unreasonable level I'm not sure these are worth it.

[ZM2]

Originally Posted by F87source

https://www.spool street.com/threads/ignition-coil-secondary-spark-energy-comparison-n54-n55-b58-and-pr.7169/ (remove the *******

At the same dwell of 3.0 ms almost double, at higher dwells a little less. But you don't want too much dwell as IGBT temps will get really high which is not good.


Honestly though, if you don't have to gap down your plugs to an unreasonable level I'm not sure these are worth it.

I read all that from Eidos's link. Great analysis. However, the Eldor coil I'm using isn't listed and they are definitely stronger than the stock Delphi's I took off: https://www.fcpeuro.com/products/bmw...or-12138657273

And when it comes to plugs & coils, you've taught me if it isn't broke don't fix it! But, was just curious since it's also an Eldor coil that only costs ~$30.

[F87source]

Originally Posted by ZM2

I read all that from Eidos's link. Great analysis. However, the Eldor coil I'm using isn't listed and they are definitely stronger than the stock Delphi's I took off.

And when it comes to plugs & coils, you've taught me if it isn't broke don't fix it! But, was just curious since it's also an Eldor coil that only costs ~$30.

Yeah I just wanted to post an acutal link incase people aren't comfortable clicking a bit.ly link (no offense Edios) since you can tag that onto an IP locator.

I think they are supposed to test an Eldor s55 coil soon, but we will see if they do I suppose.


Yeah if it isn't broke don't mess around too much because it can cause more issues than it solves, most people that want these ignition kits are n54 guys deep into the 600whp range and have to gap down to a ridiculous amount. For us track guys I think we should be fine with the stock coils, look at the m4 gts another 100 whp over us and same delphi plugs + same bosch plugs and gaps.

[F87source]

Oops I misread your original post lol my bad. I thought you meant the stock delphis.

[D CHOI]

I noticed the precision racework coils says aftermarket intake highly recommended and I only have the drop in afe pro dry filter. I'm gonna just get the eldors and hopefully that solves my sound burble issue which is lacking potency.

[F87source]

Originally Posted by D CHOI

I noticed the precision racework coils says aftermarket intake highly recommended and I only have the drop in afe pro dry filter. I'm gonna just get the eldors and hopefully that solves my sound burble issue which is lacking potency.

I think that is for the E series n55 which has the oem intake covering where the coils would sit.

[F87source]

Originally Posted by ZM2

I read all that from Eidos's link. Great analysis. However, the Eldor coil I'm using isn't listed and they are definitely stronger than the stock Delphi's I took off: https://www.fcpeuro.com/products/bmw...or-12138657273

And when it comes to plugs & coils, you've taught me if it isn't broke don't fix it! But, was just curious since it's also an Eldor coil that only costs ~$30.

New test data came out on the delphi vs eldor and there surprisingly is not a significant difference. The delphi's actually take less dwell to make the same amount of power at the upper end of the spectrum. So imo there is no need to upgrade the factory coils on these cars for eldors. The only time you should upgrade coils to a higher powered coil kit is when you are running so much power that your plug gaps have to be significantly reduced. So imo no need to upgrade sub 500 whp, because cars like the m2 cs and m4 gts run mid to high 400 whp range with the same delphi coils and same gapped bosch plugs as we do with no issues.

[ZM2]

Originally Posted by F87source

New test data came out on the delphi vs eldor and there surprisingly is not a significant difference. The delphi's actually take less dwell to make the same amount of power at the upper end of the spectrum. So imo there is no need to upgrade the factory coils on these cars for eldors. The only time you should upgrade coils to a higher powered coil kit is when you are running so much power that your plug gaps have to be significantly reduced. So imo no need to upgrade sub 500 whp, because cars like the m2 cs and m4 gts run mid to high 400 whp range with the same delphi coils and same gapped bosch plugs as we do with no issues.

Good info!

[Bee Pee]

Originally Posted by -Eidos

The thread to follow for the B58 coil kit: https://bit.ly/3qOTSMt

Could b58tu or even s58 coilpacks be an oem upgrade for tuned n55's ??

[F87source]

Originally Posted by Bee Pee

Could b58tu or even s58 coilpacks be an oem upgrade for tuned n55's ??

If you're misfiring or have to gap your plugs down extremely tight then you should look at getting coils. St that point yes these b58 coils will be a suitable bolt on upgrade with the bracket from nexyus.

[-Eidos]

Originally Posted by Bee Pee

Could b58tu or even s58 coilpacks be an oem upgrade for tuned n55's ??

They could be an upgrade but you'd have to be pushing some power to take true advantage of it.

I did about 600whp on E76 with the NGK 97506 plugs gapped at .025''.

Had misfires beyond that power level at that gap size. I could gap down on the same plugs, but I'm going to give the NGK SILZKBR8F8S plugs a shot. They're BMW's OE flex fuel plug and supposedly outperform the 97506s when holding gap sizes constant, meaning you can run a larger gap on the flex fuel plugs vs. a smaller gap on the 97506s.

Nonetheless, I am keeping an eye out on this conversion kit and plan on running it when it's available for purchase.