PNP Upgraded Injectors for NA Build?

[Altaran]

Great info.

You're sure 0280156012 is plug and play? No spacers needed?

It's a standard size body same as the 063 injectors I got, so the mechanical installation should work. It was also confirmed earlier in this thread that 996T injectors are size conformant.

Though I have not tried these myself. As far as I know these are much more than I need for an NA build.

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[Gt4]

So, I have been fiddling with this recently and just adding my findings to this thread:

I wanted to have a bigger injector for my NA build, so I started looking around.

Our injectors are size EV6E - that E is important, standard EV6 are too long. That's one order I had to send back...

Important is to check the units of the rating. A lot of injectors I searched specified in n-heptane grams per minute. This is not CC per minute.

EDIT: forgot to mention that the values differ since our cars run 5 bar fuel pressure. added flow values at 5 bar.

I ended up going with Bosch 0280156063 injectors, those were used on early 2000s Audi TTs and S3 Models. They are EV6C and a plug & play fit. They sit 2 to 3 mm higher than the stock injectors but it's still within the tolerance range. Same connector, so no adaptations needed here.
Rating in n-heptane g/min: 269
Rating in cc/minute: 374 @ 3 bar / 482 @ 5 bar
This was in line with the range my tuner recommended.

996 Turbo injectors 0280156012 are also EV6C in the same shape as the units I bought, so also plug & play fit.
Rating in n-heptane g/min: 310
Rating in cc/minute: 413 @ 3 bar / 533 @ 5 bar

Cayenne v8 Injectors 0280156102 have the same flow rating as turbo injectors, just in yellow. Can be an alternative since the 996s are currently out of stock at a lot of places.

Mercedes SLR Injectors 0280156148 (Bosch part #) / A1550780049 (Mercedes part #) are also a direct fit (EV6C) with even higher flow. Bosch branded units are all out of stock. Mercedes may sell you some if you sell a kidney.
Rating in n-heptane g/min: 337
Rating in cc/minute: 469 @ 3 bar / 605 @ 5 bar

Saab/Opel injectors 0280156023 may also work, but they have an impedance of 15.94 Ohm. I do not know if that works with the factory DME.
Rating in n-heptane g/min: 261
Rating in cc/minute: 363 @ 3 bar / 468 @ 5 bar

There's some Bosch EV14 injectors available different flow rates that should fit the fuel rail without issues, such as 0280158218. But EV12s have a difference connector, so either your plastic wiring rail for the electrics sits higher with connector adapters, or you swap the mating connectors as well. good thing about those is the little snorkel outlet is the most similar to factory.

If for any reason, somebody wants to use injectors with a longer body, it's feasibly if you change your fuel rail to an aftermarket unit (e.g. the Radium Rail), which has the mounting tho the throttle bodies as a separate bolt on piece where spacers can be added. Or feel free to cut and reweld the mounting to your OEM rail if you feel comfortable doing it. With all the injectors available in different sizes as plug and play, this however should not be necessary.

There's way more injectors out there with larger flow rates feasible for FI applications, but since I was looking for my NA build, I didn't care to write this down in detail

I have the same Bosch 62431 Audi TT injectors and I think you need to remove the white plastic washers from them and put the o-ring into the groove

[Altaran]

I have the same Bosch 62431 Audi TT injectors and I think you need to remove the white plastic washers from them and put the o-ring into the groove

That's a good idea, looking at the itb bore it does seem like a better place to put it. although the groove diameter is a bit larger so the o ring they came with won't fit. I have a spare unit on which I will try an o ring from the old OEM injectors maybe that will work. If it does I'll just get new o rings for factory injectors 👍

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[Altaran]

So some further info regarding the o-rings:
The o-ring on the nozzle side of the factory injectors fits onto the new ones without issue.
The o-ring supplied with the 063 injectors should not be used. It's possible to push it into the groove, but the OD will increase from 14,4 mm (on factory injectors o-ring) to 16,15. It may be possible to push it into the bore on the itb assembly, but it could be very annoying to remove again after some heat cycles.

The extension of the nozzle into the itb assembly barely changes from stock injector (17,45 mm) to 063 (17,28 mm). Spray pattern is V-Shape on both. So after removing the plastic disk, it should be more or less the same.

The nozzle side o-ring is BMW part 13647830611 spec'd at ID 9,3x2,62 mm.
I wasn't able to find an o-ring for the application in this size, I may order Elring 135.500, it's 9,2x2,8mm so just slightly thicker. BMW branded o-ring is over $11, which is just ridiculous.

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[0-60motorsports]

Nice update! Thanks for posting all the findings.

[Altaran]

New o rings arrived and installed on one of the spare units I have.
See in the pic below. The installed OD of the new O-Ring is 0,3mm larger than the used OE, so that should work. I also did 2 short test drives with the new injectors with the original o ring and plastic disc. After modifying the injector size and ve table, it's running ok for a garage tune. I will swap the rest of the o rings tomorrow when it's a bit cooler. Next week it's hopefully dyno time.

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[SQ13]

I’ve been using the TT injectors with OE o-rings for a year now with no issues.

https://nam3forum.com/forums/forum/main-forum/member-build-journals/73183-kong’s-e46-m3-track-to-street-car-journal?p=211683#post211683

[Altaran]

I did the change to the other groove today with the new o-rings just like SQ13 and Gt4 are running.
I would definitely recommend doing this when using the TT injectors, may also apply to others. The o-ring position they came with is too deep, so it's already out of the bore inside the itb. See below pic, you can see a bit of damage from the inside edge. There would be a possibility of an air leak.

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[e46IX]

I wish I knew about the TT injectors before-hand for my NA build. Ended up wasting too much time and effort with the EV14's, getting the washers from McMaster-Carr, then realizing the stock fuel rail won't work so bought a Radium Fuel Rail, then realizing they dont include any hoses or connectors and its all proprietary stuff to their kit so I had to buy that separately, so stupid.

[dl.m3]

Happy with my TT injectors so far after 6 months. Car fired right up and idled smooth after a simple Injector global re-scale. Runs great after some minor fueling adjustments after.

[oceansize]

Happy with my TT injectors so far after 6 months. Car fired right up and idled smooth after a simple Injector global re-scale. Runs great after some minor fueling adjustments after.

With the title of the thread being plug and play what about yours wasn’t PnP? Or are you running other modifications that contributed?

[dl.m3]

With the title of the thread being plug and play what about yours wasn’t PnP? Or are you running other modifications that contributed?

I’m talking about a tune.

[SQ13]

With the title of the thread being plug and play what about yours wasn’t PnP? Or are you running other modifications that contributed?

It physically installs fine, but you need to code/tune the car due to the different flow between OE and TT.

[oceansize]

It physically installs fine, but you need to code/tune the car due to the different flow between OE and TT.

What I figured but wanted confirmation. It was tough for me to believe anything would be completely plug and play.

[BMWfanz]

Happy with my TT injectors so far after 6 months. Car fired right up and idled smooth after a simple Injector global re-scale. Runs great after some minor fueling adjustments after.

You've done global rescale by yourself? Didn't find fixed parameter for injectors capacity