3.0 Liter re power. Need help please.

[Jetpilot123]

Prob just another m54 swap..

---

Hello all,
First off let me say that this is my first post here and I searched the screen off of my media devices on this and while I've learned a great deal on this swap I am still left with a few questions which is why I've decided to start a thread.
First the basics. I've got a 2000 323Ci 5sp and recently blew a head gasket. I decided to re power with an m54b30 from an 04 Z4 auto. I've also purchased a set of eBay headers to compliment. The m54b30 came complete, from exhaust manifolds to the throttle body and from serpentine belt to complete wiring harness and connectors. I'd prefer to keep everything 3.0 as much as possible. I know my MS42 is the problem. So my questions start with..

1) If I decide to convert to MS43, do I only need a DBW accelerator pedal and the DME to finish the conversion? Will a flash on the MS43 take care of the ews, vin coding and all that BS or do I need a key, tumbler, locks and so on..?
2) What is everyone doing with the fuel system conversion? Do I just connect my feed line to the M54 fuelrail and leave my old return line swingin'? Bit lost there..
3)If I decide to run this engine on my MS42 for now, will I be able to flash my DME to a 328 and correct CEL and anything else with the purchase of the interface and software that's available on eBay for $50 or less?.. Amateur question I know..
And lastly, is the 04 Z4 MS43 or 45?
So that's where I am now. I finished up in the garage last night with the M52 pulled and the 54 on the stand for last minute shakedown before install. I hope to finish this up this week. If you guys see anything I may have missed please let me know. And thanks in advance. You help here is greatly appreciated here.

[328 Power 04]

I would run that engine on MS42, and adapt the original throttle body to work on the M54b30 intake manifold. With something like this https://www.turnermotorsport.com/p-4...take-manifold/ or this https://www.turnermotorsport.com/p-4...adapter-plate/ 2nd one is a little easier to adapt when skipping 1 bolt.

Use original fuel rail, as well as MAF.

You should have the MS42 tuned to ~3.0 specs, especially if you will use the purple (larger) injectors from m54b30, or if intending to swap in a different MAF.

Not really that hard to do, and MS42 is customizable plenty.


The Z4 would be MS45.

[Jetpilot123]

Wow thanks soo much for the speedy reply. I've been standing in garage all morning scratching head and smashing coffee over this engine lol.. So holy chit why didn't I think of using original fuel rail. I just really wanted to keep the purple tops. So that answers that. And for now I'll just cram this thing in today and run MS42.. Ordering adapter plate now.
Can you or someone point me in a good direction for tuning and/or flashing the MS42?
I really thought this was an MS43 engine. But that the fact that it's a 45 still means nothing right? Just swap sensors as I would the 43?

[328 Power 04]

It's the DME you will be using that needs to know what sensors and attachments you will be using.

You can use purple tops without a problem in your original fuel rail. Pop them out from m54 fuel rail, put new o-rings on them, and install them to the original fuel rail. They just have to be referenced in the tune later.

As far as mass air flow sensor goes, it's very important to know what car model's sensor you will use. M52tu MAF from 323i will work fine, M54b30 maf from MS43 car is larger and has 3 pins (you would also need new larger intake tubing), M54b30 maf from MS45 car has a different plug (retrofit of this one not really recommended).



If you figure out what injectors you want to use (recommend purple tops), and what MAF you will use, then purchase an INPA K+DCAN cable like this one http://www.ebay.com/itm/192031744804 , and then send a PM and I may be able to help get the 3.0 on MS42.

If you've never done any tuning on these, it will be a very steep learning curve. Not impossible though.

[jakermac]

There is tons of info here:

http://forum.e46fanatics.com/forumdisplay.php?f=98

[328 Power 04]

These threads are good to use for info on how to get the M52tu throttle body onto the M54b30 intake manifold

https://forum.e46fanatics.com/showthread.php?t=691568
http://www.e46zone.com/forum/topic/3...manifold-swap/

[Jetpilot123]

If you figure out what injectors you want to use (recommend purple tops), and what MAF you will use, then purchase an INPA K+DCAN cable like this one http://www.ebay.com/itm/192031744804 , and then send a PM and I may be able to help get the 3.0 on MS42.

If you've never done any tuning on these, it will be a very steep learning curve. Not impossible though.

I'll def be using the purple tops and the 323 maf for now. I've done some tuning on my sport bike and in class a little back in college but never on the BMWs. I'm sure I'll pick it up. Thanks again big time for the help. I'll keep you posted..

[Jetpilot123]

So this swap isn't going as fast as I'd like but it's coming. Currently waiting on gaskets and orings and other parts. Meanwhile, I'm looking over this engine to swap sensors so I can use my MS42 and I notice that nearly ever sensor on this engine is identical to my m52 except throttle body and maf. Does this mean that all these sensors on the m54 will work fine? Or do they work on a diff signal range? I'd rather use these newer sensors if possible as mine are crusty, old and questionable.

[328 Power 04]

Correct. It uses the same sensors, except for the mass air flow and throttle body. The MAF from the m54b30 from Z4 (MS45 dme) will use slightly different wiring than M54b30 (MS43 DME), so it's preferred to use the M54B30 MS43 maf if going that route.
For simplicity, throttle body needs to be the MS42 one.

[Jetpilot123]

Update!
I've successfully swapped in the m54b30 and just finished with my first test drive. Holy cow! All smiles here! 1st gear pull right out of the driveway and I was already giggling. I'll only drove it for about 15-20 minutes but everything seems to be smooth. The car wouldn't idle or rev at first until I unplugged the maf sensor. Now it's drivable, so I assume it could be fact that I'm still using the 323 maf without some kind of flash? Idk. I'll post more data and pics after more driving tomorrow...

[328 Power 04]

Are you using the m54b30 injectors?

It's not the MAF that is the problem, it's mismatched injectors to the flash.

Unplugging the maf just puts the engine into complete open loop and it runs from predetermined data. Not good to drive it like that.

[Jetpilot123]

Yes, I am using the m54b30 injectors. The only thing I'm using from the M52 is TB and MAF. I will be ordering a 3.0 maf on Monday.
I think you mean "Closed Loop" when maf is unplugged. But yes I'm aware. I had to test drive this thing lol. After another short 15 min cruise though I'm confident I bought a great used engine. So now it stays parked till I get a flash. Is that something you can still help me with? Thanks..

[328 Power 04]

Closed loop = using feedback from sensors to run engine
Open loop = ignoring feedback sensors (ignoring O2, MAF, etc) and running from prewritten data.

Definitely meant open loop.

Yes, if you have capacity to flash the DME by yourself, I can provide edits, if not.. it may be easiest to ship me the DME. I can custom custom flash it for M54B30 injectors, and early 3 wire M54b30 maf. Send PM for whichever idea you choose. I'll make it worthwhile.