[F87source]

Originally Posted by OG Shark

The heat struggle is real!

So you know the backstory the owner of M Technik has basically become like a little brother to me since I have started out on the track. He and another good buddy of ours first built my M3 race car and we have done everything on my BMWs together since. He is the one that put together the conversion to the A2W - very much a mad scientist. M-Technik is primarily a service and repair shop first though - so the three of us are collaborating together in OG Shark Motorsport with a focus on race/track/high performance builds and parts.

Not that any of that makes much of a difference here - the main thing being that we are working on the pnp kit! Just taken a bit of time for us to be able to get to this point with all that we needed to do to get up and running (and also get a race in here & there). Our in house parts & kits are starting to come out now though (M2 half cage prototype is ready and we are starting production!). This conversion kit is definitely one of priorities now.

And price - he hasn’t been able to answer that because we are not 100% sure of the total cost yet. Getting close but I like to know exactly what we have in something before we figure out the price. Also working on the final parts/options that we want to make available with these kits

Can you guys also look into a larger s55 radiator and oil cooler retrofit as well (radiator is the important one)? It should be possible with the air to water intercooler in place.

[OG Shark]

Originally Posted by F87source

Can you guys also look into a larger s55 radiator and oil cooler retrofit as well (radiator is the important one)? It should be possible with the air to water intercooler in place.

Yes even though the TMIC conversion is the focus we have been looking at the entire cooling system. Also been getting the relationships in place to be able to offer the exact pieces that we want to use with this kit

[F87source]

Originally Posted by OG Shark

Yes even though the TMIC conversion is the focus we have been looking at the entire cooling system. Also been getting the relationships in place to be able to offer the exact pieces that we want to use with this kit

cant wait!

[eeyang92]

Originally Posted by -Eidos

Haha maybe I'll try it out. The increase in efficiency will be nice and I won't have to run a .018'' gap size on these NGK F8S flex fuel plugs.

I'll have to look into which B58/S58 plugs to run for this kit.

Hey, did you ever figure out which plugs are needed? Nexsys gives the P/N for the coils (https://www.fcpeuro.com/products/bmw...or-12138643360) which seems right (although I'm not familiar if the different revisions of the B58 may have different coils).

From my reading, it seems like the NGK 94201 https://www.fcpeuro.com/products/bmw...plug-ngk-94201 are the correct plugs. From what was said earlier in this thread, it seems like B58 plugs (even OEM) are 1 step colder (can this be confirmed?) than the M2 plugs, which should be perfect for my application.

Thanks!

[eeyang92]

Nexsys support got back to me very quickly, and this is what they said:

you can run the typical N55 NGK 97506’s, stock N55 plugs or B58 plugs. Our spring will make good contact with all of them. We do recommend the 97506’s though.

I did have some concerns since it seems the B58 guys have issues with 97506s since the dimensions are slightly different, but they responded with:

we wouldn’t recommend the 97506’s on a B58 engine but on an N54/N55 with the B58 coils, no problem!

So I'll definitely give the kit + the coils a try (with maybe a larger gap like 0.027"-0.03", which is closer to stock) and see how that works for me.

[Leaveatrail86]

Originally Posted by eeyang92

Nexsys support got back to me very quickly, and this is what they said:



I did have some concerns since it seems the B58 guys have issues with 97506s since the dimensions are slightly different, but they responded with:



So I'll definitely give the kit + the coils a try (with maybe a larger gap like 0.027"-0.03", which is closer to stock) and see how that works for me.

Did you ever get around to trying this?

[eeyang92]

Originally Posted by Leaveatrail86

Did you ever get around to trying this?

97506 (or any OEM N55 sized spark plug) works with their B58 kit - they made their kit such that the length of the coil boot is correct for any N55 plug. Currently running 0.028" on NGKs but I do have brand new OEM plugs sitting in my garage which I may try (with stock gap).

[-Eidos]

I've had this kit on-hand for a while now along with the NGK 95248 SILZKGR8C8S plugs (S58/B58).

It's finally getting installed and I'll start the gap at .025'' on full E85 and see how that fares at 650+whp on the new turbo.

Definitely would like to start higher then gap down as needed, but I can't waste precious dyno time for the new calibration

For reference I've ran 97506s at .018'' and NGK F8S flex fuel plugs at .020'' at 620whp on Full E85. The F8S plugs at the higher gap performs better and has a higher power ceiling with room to gap down compared to the 97506s.

That said, the above is without the stronger B58 coils, so this Nexsys kit should be very beneficial. If I had known that N55 plugs were compatible I could have done a nice apples to apples comparison and see the delta in gap size gained by having stonger coils. Maybe in the future

[chris719]

No benefit here for stock or stage 1 tune (S55) I assume?

[F87source]

Originally Posted by chris719

No benefit here for stock or stage 1 tune (S55) I assume?

If you didn't have to gap down from stock then no real gains to be had imo.

[shaneguags]

Originally Posted by -Eidos

I've had this kit on-hand for a while now along with the NGK 95248 SILZKGR8C8S plugs (S58/B58).

It's finally getting installed and I'll start the gap at .025'' on full E85 and see how that fares at 650+whp on the new turbo.

Definitely would like to start higher then gap down as needed, but I can't waste precious dyno time for the new calibration

For reference I've ran 97506s at .018'' and NGK F8S flex fuel plugs at .020'' at 620whp on Full E85. The F8S plugs at the higher gap performs better and has a higher power ceiling with room to gap down compared to the 97506s.

That said, the above is without the stronger B58 coils, so this Nexsys kit should be very beneficial. If I had known that N55 plugs were compatible I could have done a nice apples to apples comparison and see the delta in gap size gained by having stonger coils. Maybe in the future

what benefits have you noticed with the B58 coil conversion ? I as well am running a big turbo and at 660whp. I just been keeping stock because I think the Nexsys would be a waste but saw someone say it's better specifically for E85 (which I just installed). I'm currently running stock injectors and NGK 97506s at .020

[eeyang92]

Originally Posted by shaneguags

what benefits have you noticed with the B58 coil conversion ? I as well am running a big turbo and at 660whp. I just been keeping stock because I think the Nexsys would be a waste but saw someone say it's better specifically for E85 (which I just installed). I'm currently running stock injectors and NGK 97506s at .020

Benefits are:

1. Being able to run a larger gap (maybe even stock gap)
2. Better idle
3. Better fuel economy
4. More power since the combustion is more complete (although how much power is unknown, likely to be a small factor)

If your setup is working, I don't know if it's strictly necessary to upgrade to B58 coils. I was having issues on the top end on (stuttering and wavy AFR) E50 with N55 coils at 0.023" and didn't really want to gap smaller, but I could have done 0.02" and it probably would have been fine.

[shaneguags]

Originally Posted by eeyang92

Benefits are:

1. Being able to run a larger gap (maybe even stock gap)
2. Better idle
3. Better fuel economy
4. More power since the combustion is more complete (although how much power is unknown, likely to be a small factor)

If your setup is working, I don't know if it's strictly necessary to upgrade to B58 coils. I was having issues on the top end on (stuttering and wavy AFR) E50 with N55 coils at 0.023" and didn't really want to gap smaller, but I could have done 0.02" and it probably would have been fine.

I think I'll maybe try them out next time I need new spark plugs. I just got some installed 400 miles ago so unfortunately it'll be awhile

[shaneguags]

what's your guys' opinion on the S55 Eldor coils on the N55. I have been thinking about adding them since I heard they are better quality and slightly better than the N55 Delphis. for my specific setup, I can't see it hurting my car.

[F87source]

Originally Posted by shaneguags

what's your guys' opinion on the S55 Eldor coils on the N55. I have been thinking about adding them since I heard they are better quality and slightly better than the N55 Delphis. for my specific setup, I can't see it hurting my car.

Eldors are compatible so no worries about it causing issues, but testing by nexsys shows they are only a hair (literally almost no difference) better than the Delphi. So imo it's not worth the money to swap over if your current coils are working ok.

[shaneguags]

Originally Posted by F87source

Eldors are compatible so no worries about it causing issues, but testing by nexsys shows they are only a hair (literally almost no difference) better than the Delphi. So imo it's not worth the money to swap over if your current coils are working ok.

yea I've had no issue on stock so I was curious if it would even make a difference. I'll prob just skip them then.

[F87source]

Originally Posted by shaneguags

yea I've had no issue on stock so I was curious if it would even make a difference. I'll prob just skip them then.

Yeah imo not worth going to eldor from delphi, just a massive waste of money.

However if I were you I would absoltely invest in the nexsys kit. You are making the power to justify the upgrade.

[shaneguags]

Originally Posted by F87source

Yeah imo not worth going to eldor from delphi, just a massive waste of money.

However if I were you I would absoltely invest in the nexsys kit. You are making the power to justify the upgrade.

yea for sure, I'll probably wait since I just got new Delphis around 3k miles ago. also, I got new plugs 400 miles ago so I'll prob wait till I need new plugs and then gap higher to work well with the Nexsys coils

[shaneguags]

I just decided to pull the trigger on the Nexsys B58 coil conversion kit. My tuner and shop keep experiencing misfires on my map 2 kill map. Once we hit past 23 - 24 PSI around 5500 RPMs, the power gives out.

We changed out the spark plugs 3x and gapped once at 0.020 and 0.018 twice. We also logged all fueling on Tuner Pro, with all fuel pumps, injectors, flex fuel ECU, and port injection working as it should with stable fueling.

There are no codes being thrown at the car and this is leading me to believe that the coils are the issue at hand since I'm currently running stock N55 Delphi coil ignitions (changed 4k milage ago). As well, the shop tested other parts and we saw that the MAF sensor is working, O2 sensor is fine, no boost leaks, and EU6 injectors are good enough paired with the intake manifold 750cc injectors (changed 1k milage ago).

It's strange because the car works perfectly fine on my 93 map and my conservative flex fuel map 1. Considering it's a top end issue on a higher boost and ethanol application, I would to think it's a sparking issue.

I'm going to install the B58 Eldor coil ignitions and then regap my NGK 97506 step 2 colder plugs back up to 0.025. My goal is to ultimately hit 700whp but I need to fix these damn misfires before continuing. I'll keep everyone updated once everything is installed.

[CamaRai]

@[shaneguags]..I’d like to see the update.. Definetly sounds spark related. Just curious why no misfire codes. Im looking into this mod as well, but I’m early ln my M2 mod journey.

[shaneguags]

Originally Posted by CamaRai

@[shaneguags]..I'd like to see the update.. Definetly sounds spark related. Just curious why no misfire codes. Im looking into this mod as well, but I'm early ln my M2 mod journey.

I wouldn't add unless you on high content E or big turbo'd tbh. you probably won't benefit

[GeraldM2]

Originally Posted by shaneguags

I wouldn't add unless you on high content E or big turbo'd tbh. you probably won't benefit

Do you think going pure stage 2 justifies getting this kit?