[ab987]

Hey guys,

Getting some fun misfires at high RPMs now that I've gone to RB Twos. I am on original coils (to my knowledge) at 100k miles and 20psi is doing them in.

For those of you running B58 coils, are they worth it? Do you have to modify them past the point of return and cannot warranty them should something go wrong? Have you noticed smoother operation at low load compared to Eldors?

I am hesitant about the B58 coils because of the cost of the adapter plate, modifying the factory VC, modifying coils, etc. If Eldor N54 coils can support 600 crank horsepower without hiccups I think that's the route I'll take.

Thanks

[iqraceworks]

From the little bit of research that I've done on this.......the B58's and Eldors put out close to the same amount of power. I have seen guys on other forums claiming they are making 700+HP with big single turbos and Eldor coils. The B58's require some wiring changes and brackets to mount them....seems like a royal pain in the butt.

That being said...I'm running the OEM Delphi coils from FCP Euro and I should be making close to 565-575hp at the tires on an E40 mix and bigger turbos at 27psi....and I have no issues with misfires.

With 100k miles on your coils......ANY new coils are going to help big time!!

If I were you...I would just order the N55 eldors from FCP with the lifetime warranty and be done with it 👍

[ab987]

Originally Posted by iqraceworks

From the little bit of research that I've done on this.......the B58's and Eldors put out close to the same amount of power. I have seen guys on other forums claiming they are making 700+HP with big single turbos and Eldor coils. The B58's require some wiring changes and brackets to mount them....seems like a royal pain in the butt.

That being said...I'm running the OEM Delphi coils from FCP Euro and I should be making close to 565-575hp at the tires on an E40 mix and bigger turbos at 27psi....and I have no issues with misfires.

With 100k miles on your coils......ANY new coils are going to help big time!!

If I were you...I would just order the N55 eldors from FCP with the lifetime warranty and be done with it 👍

Thanks for the reply, are N55 eldors different than N54 eldors? I thought the two shared coils.

[ab987]

Let's expand the scope a bit. Which are the best plug-n-play coils?

I cannot find any controlled testing of Eldor N54 coils anywhere. I don't quite buy into the hearsay that they are 100% the best, no substitutes.

For example, bahn's testing shows the Delphi S55 coils are the best currently-produced OE option (Eldors aren't made anymore for S55, maybe another reason to avoid them if production for N54 might also end). Is that the same coil that is also listed for our cars on realoem/FCP/ECS?

I like the Dinan coils for their color options and success of users so far, but also cannot find any proper controlled testing by them either.

[Saif2018]

Originally Posted by ab987

Hey guys,

Getting some fun misfires at high RPMs now that I've gone to RB Twos. I am on original coils (to my knowledge) at 100k miles and 20psi is doing them in.

For those of you running B58 coils, are they worth it? Do you have to modify them past the point of return and cannot warranty them should something go wrong? Have you noticed smoother operation at low load compared to Eldors?

I am hesitant about the B58 coils because of the cost of the adapter plate, modifying the factory VC, modifying coils, etc. If Eldor N54 coils can support 600 crank horsepower without hiccups I think that's the route I'll take.

Thanks

I'd agree totally with iqraceworks, just go with the Eldors from FCP. Those Dinan ones posted in the other thread also seem fine. As stated at 100k your coils are probably toast.

No need to mess around with brackets, wiring etc.

[ab987]

Originally Posted by Saif2018

I'd agree totally with iqraceworks, just go with the Eldors from FCP. Those Dinan ones posted in the other thread also seem fine. As stated at 100k your coils are probably toast.

No need to mess around with brackets, wiring etc.

I appreciate it, but is there any controlled testing that shows the Eldors are superior? I would be inclined to believe the Delphis would be considering they are the top S55 coil that's currently produced, and generally S55 > N54 when it comes to application-specific coils.

[BSM n54iS]

S55 Delphi=Dinan > N54 Eldor

[ab987]

Originally Posted by BdSM n54iS

S55 Delphi=Dinan > N54 Eldor

Cool, and are the S55 Delphis the same as N54 Delphis? They are both the same listing on FCP and realoem, just wanted to make sure they are different than the old N54 Delphis

[BSM n54iS]

Originally Posted by ab987

Cool, and are the S55 Delphis the same as N54 Delphis? They are both the same listing on FCP and realoem, just wanted to make sure they are different than the old N54 Delphis

Link? Pretty sure you're reading the application list which covers s55's and n54's, same coil PN right?

[ab987]

Originally Posted by BdSM n54iS

Link? Pretty sure you're reading the application list which covers s55's and n54's, same coil PN right?

https://www.fcpeuro.com/products/bmw...6153-1#fitment
https://www.realoem.com/bmw/enUS/partxref?q=12138616153

Is this considered the S55 Delphi or the N54 Delphi? I can't even find an N54-specific Delphi, so I don't know what bahn tested. I specifically want the S55 one.

[BSM n54iS]

Originally Posted by ab987

https://www.fcpeuro.com/products/bmw...6153-1#fitment
https://www.realoem.com/bmw/enUS/partxref?q=12138616153

Is this considered the S55 Delphi or the N54 Delphi? I can't even find an N54-specific Delphi, so I don't know what bahn tested. I specifically want the S55 one.

S55, I compared those in the Dinan thread. I actually don't think there is such a thing as the n54 Delphi anymore, it may have been years back when they were first coming out along with the s55's or something, but now it seems that 16153 pn is the one and only as far as Delphi go. Someone correct if I'm wrong

[Rule1977]

I run Eldor coils and NGK 97506 plugs and have never had a misfire since I put them in.

[ab987]

Originally Posted by BdSM n54iS

S55, I compared those in the Dinan thread. I actually don't think there is such a thing as the n54 Delphi anymore, it may have been years back when they were first coming out along with the s55's or something, but now it seems that 16153 pn is the one and only as far as Delphi go. Someone correct if I'm wrong

Do you know if the Eldors have been confirmed to be better than the Delphis? Because there still is no evidence that I've seen that isn't anecdotal.

[Saif2018]

Originally Posted by ab987

Do you know if the Eldors have been confirmed to be better than the Delphis? Because there still is no evidence that I've seen that isn't anecdotal.

They are about the same, haven't seen any hard evidence either, maybe slightly better who knows, I've run them with no issues. I'd get t the Eldor ones if you can, otherwise Delphi ones will do the job fine.

[ab987]

Originally Posted by Saif2018

They are about the same, haven't seen any hard evidence either, maybe slightly better who knows, I've run them with no issues. I'd get t the Eldor ones if you can, otherwise Delphi ones will do the job fine.

I think I will go for the Delphis only because of their lack of S55 production, I am in this for the long haul and don't want them stopping production. Thanks guys

[BSM n54iS]

Read through page 1 of the Dinan thread again and then go to a different website mentioned where actual numerical data was compiled. They are different.

[ab987]

Originally Posted by BdSM n54iS

Read through page 1 of the Dinan thread again and then go to a different website mentioned where actual numerical data was compiled. They are different.

That's the site I am referring to, they never tested Eldor N54 coils despite both bahn and Dinan saying they would. Unless I'm blind.

[Bimmer_Bro]

Originally Posted by ab987

That's the site I am referring to, they never tested Eldor N54 coils despite both bahn and Dinan saying they would. Unless I'm blind.

Do you plan on going more than 20psi? How much power you currently pushing?

To be honest I think you're over thinking it. With the age of your coils, a stock or light tune is going to misfire. You will be replacing plugs and coils a lot more often when tuned either way.
Many guys have had great luck with Eldor on high hp applications.
I use bosche oem plugs and coils with zero issues. (Oem turbos 18 psi)

[ab987]

Originally Posted by Bimmer_Bro

Do you plan on going more than 20psi? How much power you currently pushing?

To be honest I think you're over thinking it. With the age of your coils, a stock or light tune is going to misfire. You will be replacing plugs and coils a lot more often when tuned either way.
Many guys have had great luck with Eldor on high hp applications.
I use bosche oem plugs and coils with zero issues. (Oem turbos 18 psi)

20psi is the base map, we're planning on settling in 22psi on 93 and eventually further (25+) on full e85 when ReFlex has MHD integration. My stock coils and 1-step-colder plugs were plenty for e50 stage 2+, but if they can't keep up now on a mild tune, there's now way they will keep up making over 600 crank hp.

[Bimmer_Bro]

Originally Posted by ab987

20psi is the base map, we're planning on settling in 22psi on 93 and eventually further (25+) on full e85 when ReFlex has MHD integration. My stock coils and 1-step-colder plugs were plenty for e50 stage 2+, but if they can't keep up now on a mild tune, there's now way they will keep up making over 600 crank hp.

I am honestly surprised you got 100k on them even without a tune. They are just old. I'd go with the Eldors off fcp with free lifetime replacement. I'm sure the Dinans are good but they are new. Eldors have been used on our platform for years. Good luck with the build .

[iqraceworks]

Eldors....1 step colder NGK plugs, gap them at .020".....and run it. Guys have been running that setup for ever making big power. You are overthinking things....😁

[ab987]

I appreciate the responses but I want to see some testing and numbers. I'm sure Delphi and Eldor coils would work fine for my application but for those really winding it out, it would be great to know