turbo / swap / etc

Z

z4turbo

New member
Hi,

Planning on getting a Z4 2.5 a/t as my next project. Got a couple of questions (couldn't find definitive answer on google)

** Nope, buying a Z4M won't be cheaper in my case / Manual not available in my country **
only option is to convert to manual or swap engine
(for reference a used 2003 z4 2.5 a/t costs roughly USD33k, an e46 m3 costs around USD48k)

Intro:
Haven't tried standalone, but understand the basics.
Proficient with AEM Fic - Don't want to use this again. The ecu still has too much control over everything. Had to learn to tune via hex/damos just to make the ecu less smart. But still prefer this over flashing just because of Live-tuning / boost - controller.
Basic Hex (winols) tuning. (finding maps based on maps of fully defined older ecu, fuel, ignition, CELs etc)
Fabrication is ok, but don't want to cut up the car

1. Has anyone cracked the Ms45. Couldn't get any info on what Bimtune can actually do. Also from what I understand, well defined maps (ms43) don't translate well to ms45 (for finding maps etc).
a. Traction control?
b. Anyone hardwire BDM?
c. Any xdf / Kp that are well defined (CELs, Traction control, fueling, ignition etc)
d. Anything like Vagcom to recode modules (a/t to manual etc)
e. Any cheap emulators that work? Need live tuning.

2. Is the can-bus of the z4 the same as the e46? For instrument cluster standalone compatibility, prefer not to run parallel, want to use the throttle for traction, boost cut, rev limit etc.

3. Does a Gs6-53 have the same bolt pattern as the 37? Anyone use this with an m3 rear diff?


4. Any turbo z4 pics? (could only find supercharged ones) - can fabricate intake/exhaust manifold, rebuild engine etc.
a. Prefer topmount (easier to maintain and don't have to make/buy a lower engine mount)
b. How come there aren't any 1000whp builds on here? (I know I know another 1000hp question. Lol)

6. Any high HP m54?
a. Kept reading that the headbolt/stud threads strip.

7. Engine swap (prefer to keep it BMW but ok with 2jz or LS as long as it's turbo)
a. Anyone swap in a n54? Does it bolt on a Gs6 37?
b. Any swapped ls2 that's turboed

8. Widest tires on standard body with m3 diff/carrier? (prefer 305/325)

:driving:
 
These are all questions you should ask on bimmerboost or e46fanatics.

Also I think that if you go turbo and expect the engine to use thàt much power that you need the gs6-53 gearbox, you'll get a useless car in combination with the m3 diff.

The m diff has a much shorter gear (m diff 1:3,62, z4 2,5i auto 1:3,65, z4 2,5 manual (5 speed) 1:3.23, z4 3.0i (6 speed) 1:3.07)

I've supercharged my car (z4 3.0i) to 380hp 465Nm and the first gear is already loosing traction on high quality medium temp tarmac (without dumping the clutch, so on midrange engine torque). With the hot tarmac in the philipines traction will be much less, so with more projected torque and a much shorter diff drive ratio and a shorter gearbox drive ratio you'll be only spinning tyres in 1st and 2nd without being really fast.
If you look at light high power cars (corvettes, lamborghini's etc) they all do 50mhp+ or so in first gear, because you benefit more on the street. On a dragstrip with slicks it is obviously different, but I expect you plan to build a streetcar and not a racecar/driftcar.

I also think that if you go really high power, you should use a stand alone ecu.
From what I've seen the ms45 has lots of (unknown?) safety mappings (more than the e46 ms43), and they will all go out of parameters with high horsepower (+400hp).
There is probably a reason that the none of the big tuning companies (VF engineering, G-power, ESS) do not go above 400hp for the ms45 ecu, but do for the ms43 (e46)
 
Sorry its a bit vague, but a friend of a friend had a SuperCharged E85. I never met the guy but i am told he had the same issues with 1st and 2nd gear and the clutch burning up, so he mounted the gear box from a 3 SERIES 3.0 330D SE, diesel being able to cope with higher torque levels.
I will ask about this weekend and get some more specific details.
 
Try converting it to MS43 and you´ll have access to all the goodies ;)

I´m currently working on a xdf that covers ALL the maps and factors that are usefull, even the axis values.

We have the ability to use BimmerLogger for every MS43 car as i removed EWS :o :oops:

So you basically write that specific full flash file onto any MS43 ecu, plug in an ftdi based cable and can log with BimmerLogger without paying anything. You can get live tune if you want, but thats getting pricey (JMGarage!). We´re currently working on shutting the checksum off, so that you can easily change settings and directly upload them to your ecu. Not really live tuning, but its affordable.

stay tuned.
 
While a stout engine, the M54 isn't built for taking a whole lot of boost. There are a lot of limits you will have to overcome, which is why I stopped at 9 psi. Best to do as GuidoK said and spend some time on those other forums.

Our ECU is actually the MS45.0, which is an oddball ECU that few have tuned. When I had my dyno tune done a couple of months ago, the tuner had to build everything from scratch, despite having tuned numerous supercharged E46's with MS45 ECU's.

If you want the manifold and such, you might be able to purchase it from Technique Tuning.
 
If you go high psi (above 10), you also should convert to a fuel pressure regulator that is vacuum controlled.
 
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