[Yotaismygame]

I doubt anyone actually knows this answer but what's your opinion? Another year? Will a company out there engineer their own and under cut BMW?

[TheMidnightNarwhal]

Yeah curious to I have 5 I will probably have to replace eventually (non index 12s). I thought it was just COVVID pricing but it seems other parts haven't had the same boost so no idea what's going on. Maybe some part is so rare now that the value of it increased. Really hoping they go down to.

[Yotaismygame]

Originally Posted by TheMidnightNarwhal

Yeah curious to I have 5 I will probably have to replace eventually (non index 12s). I thought it was just COVVID pricing but it seems other parts haven't had the same boost so no idea what's going on. Maybe some part is so rare now that the value of it increased. Really hoping they go down to.

The supply chain still hasn't caught up. That plus inflation is my guess for the reason. Just curious if there will be light at the end of the tunnel. Or are we forever screwed. Kids will be buying these cars for the cheap HP but soon realize if you have any problems you're screwed.

[iqraceworks]

I'm surprised some aftermarket injector company hasn't come out with an injector for the N54. There is definitely a market for them.

[Yotaismygame]

Originally Posted by iqraceworks

I'm surprised some aftermarket injector company hasn't come out with an injector for the N54. There is definitely a market for them.

It hasn't been too long still. If this continues long enough I'd think it would happen. I mean they use to be affordable.

[R3dLeader]

They are made in Italy. Doubt they will reduce prices. They're Gucci injectors.

I have 2 N54s and not a single index 12. I'm sweating profusely. Luckily one of mine has all index 1, so I might be ok there?

The other one is a mix of index 5, 7, and 9 lol.

There is a set of used index 1 posted in the classifieds, $750 for 6 with unknown mileage.

[335i54n]

nope will just keep going up imo. they dont make a motor that uses them for a while and piezo injector are just too expensive for aftermarket to make. used and cleaning services are where the market going to go imo as more people move on from n54.

[335i54n]

the electronics on the inside are updated/redesign. its not crap, most non 12 injector/10yr injector are failing to a certain extent. besides not leaking, a set of fresh plugs and reinspect after few hundred mile will tell you.

[Bimmer_Bro]

Originally Posted by TerminatorStout

Can someone explain HOW / WHY the index 12's are so much better.

I understand they are the "newest" version.

I don't want stories or posts about how they work better. I want to know SCIENTIFICALLY why they are better.

I think its a load of horse crap. I am running index 1's without issue, for quite some time, with ~400 WHP, and also Index 7's - mostly stock but I floor it non stop.

OF Course if you have 100k mile injectors with missfires and you put "NEW" index 12's, of course you will be problem free.......??

I don't think it's about working better, or more performance. It's completely to do with reliability. BMW revised these 12 times trying to get them to be reliable. They even offered a 10 yr replacement as many owners were having issues. BMW lost a ton with these injectors.
If your injector 1s are issue free, it's probably just the roll of the dice.
I have a bank of 11s and a bank of 12s lol

[Yotaismygame]

Someone should make a DI delete kit Just plug the ports and go port injection....I kid but id do if it was a thing

[iqraceworks]

Originally Posted by Yotaismygame

Someone should make a DI delete kit Just plug the ports and go port injection....I kid but id do if it was a thing

Isn't there quite a bit of power than you will lose from deleting the DI setup? There is a reason BMW engineers chose to inject fuel at 2,000psi at the top of the compression stroke at a specific degree in the crankshaft rotation. More efficient burn, able to run more compression and timing without detonation, better fuel atomization,.... probably some other reasons....

It's not as simple as "just delete the DI setup and run the motor on 100% port injection". There is a reason why you can easily get 600hp out of these motors without even trying....and a big factor is the DI setup.

[iqraceworks]

You can't rebuild these piezo type injectors. You can attempt to clean them....but that's it.

There is a reason why nobody sells "remanufactured" N54 injectors.....

[iqraceworks]

I guess my response to that would be.....if there were companies out there that could actually refurbish these injectors, including the piezo chip stacks, why are people still spending $3k on a set of brand new injectors?

If getting them refurbished for a reasonable price was actually an option, you would hear everyone on every N54 forum and FB group talking about.....but you don't.

FCP had "remanufactured" injectors for a while, and I saw plenty of people having all kinds of issues with them.

If you have some source that can rebuild these things, including refreshing the piezo chip stacks, me and everyone else in the N54 community would sure love to know about it........

[CarAbuser]

There was some detail in an FCP video about the technical changes of the injectors. The primary cause of failure seemed to be heat.

I don't know if the index 12s are superior in performance but they are less failure prone. My first set of injectors failed open and BMW put 12s in under warranty. When I got my second N54, the first thing I did was to replace the index 7s with a set of new 12s just to avoid dealing with another breakdown and also the risk of fuel dilution wrecking my engine.

Even at the current £2k price I'd still say it's worthwhile. I doubt they'll ever get cheaper.

[TheMidnightNarwhal]

Originally Posted by iqraceworks

I guess my response to that would be.....if there were companies out there that could actually refurbish these injectors, including the piezo chip stacks, why are people still spending $3k on a set of brand new injectors?

If getting them refurbished for a reasonable price was actually an option, you would hear everyone on every N54 forum and FB group talking about.....but you don't.

FCP had "remanufactured" injectors for a while, and I saw plenty of people having all kinds of issues with them.

If you have some source that can rebuild these things, including refreshing the piezo chip stacks, me and everyone else in the N54 community would sure love to know about it........

They are companies that do that. The problem is it's not just the piezo stack that is the issue. But yeah, the remanufactured injectors are just cleaned up injectors with renewed stacks. We found this conclusion in this thread https://www.e90post.com/forums/showt...1962549&page=2 . There is no way to internally rebuild them.

[CarAbuser]

Originally Posted by TerminatorStout

Out of curiosity, what was the mileage they were replaced at and have you put that many miles on the new injectors yet?

Replaced at 30k, on 98k now.

[Silkyg]

I bought an extra set for a build car I was buying and luckily it showed up with 12’s already installed. So I have a new set if I ever needed them. I thought about selling them but i feel as soon as I do I’m going to need them. Maybe everyone looking to by from private sellers will cause the demand to drop.

[etiger13]

So DI delete isn't really an option but why isnt there some conversion kit to use completely different injectors?

[iqraceworks]

Originally Posted by etiger13

So DI delete isn't really an option but why isnt there some conversion kit to use completely different injectors?

Because up until just a couple of years ago...you could get new injectors for relatively cheap...

[Yotaismygame]

Originally Posted by etiger13

So DI delete isn't really an option but why isnt there some conversion kit to use completely different injectors?

There is. But at this point its more expensive than injectors and a lot more complicated. I outlined in another thread what I thought would make deleting DI make sense. IMO its coming, and eventually will be a pretty normal thing. IQrace is correct, a few years ago this wasn't a problem at all.

[whyzee125]

You can make big power on PI alone like a 2JZ, but the piezo injectors are way more efficient. In a perfect world these burn cleaner, more precisely to avoid pre ignition, and get way better MPG. Think FI vs carb, but we're 30 years past that. BMW ultimately went back a few steps on the N55 with the simple solenoid injectors bc they bit off a bit more than they could chew with the piezo injectors on the N54, ultimately causing them to lose a ton of money. The solenoid injectors, all else being equal, would be less efficient but they did some other changes on the N55 to make up for it. IMO these injectors are way too complicated to be worth an aftermarket company's time and efforts--they'd spend 10 years and still not have it right, just like BMW did lol.

While DI delete does exist, it's not practical unless you're doing it bc your specific fueling needs require it. It won't be cheaper than just buying a set of index 12's from FCP.

IMO they'll come back down at some point, but I don't think this is just COVID pricing. You could always go with a used set of 11's or 12's if you can't stomach the $3k for new ones, which would be understandable. There are a few sellers on the forum here who sell a lot of index 12's.

[AWD Addict]

I think at these prices, someone is going to jump into the market and start producing them at more volume.