Oh boy here we go,
I currently have obtained all the parts to supercharge my M112 engine and plan on installing here soon.
Yes, I understand the many differences between built internals, compression ratios, and all the other details. I have found one other person who has been able to do this successfully and they used a standalone AEM-6 unit I believe. I was wondering, knowing that the crossfire/SRT6 and E320/C32AMG have very similar platforms if I could flash and tune my 2002 E320 3.2L Gas similarly to a crossfire. Or are they completely different systems (Just from differences in brands or even climates that could change them) and should I just do a standalone myself? (Typing this I completely forgot if my fuel harness can support the C32 fuel injectors) At the end of the day the question is "Is this possible to do without using a standalone, and do you have any recommendation?" Need halp

 

The M112 NA and M112K engines use completely different ECU's, you can't just reflash your M112 unit (M112 NA uses ME28, M112K uses ME28.1). The M112 NA engine can be fitted with a supercharger off an M112K. The easiest/best way is to also use the M112K engine wiring harness (the M112 NA harness can be used but it requires modification), swap the fuel injectors over, and plug it all in to an M112K ECU. You'd just need to get the M112K ECU mated up to your existing SKREEM module and coded properly for your car. The increased compression of the NA engine will be fine as long as you stick with the stock pulleys and tune (don't go trying to increase boost too much). Since your in the US, Josh at the MSS should be able to make the ECU for you. The M112K ECUs are getting hard to find and are pretty expensive, but the ECU from an SRT6, SLK32 or C32 will all be suitable. If you want to improve things a bit further then I'd also change the tune in the transmission controller so it's set up properly for the increased torque.

 

Holy crap so much info thank you x.x I will try and contact Josh is it MSSAutomotive? I will be on the lookout for the M112k ECU's!
More info if needed some critical parts:
78mm clutchless pulley
c32 fuel rail/injectors

 

Do you believe it would be easier/cheaper to go standalone? Or should I try and keep it Mercedes/Chrysler?

 

I'd stick with the ME2.8.1 electronics, if you can. I wouldn't be hunting down pulleys on a stock M112 bottom end. You're pushing it as it is with the stock setup supercharger. Get a transmission tune. Big gains in performance and driving experience from that.

MSS is going to be the lowest frustration route for you on this project.

 

Sorry I meant I have those parts if that affects anything. I already have the pulley so I should hopefully only pull 7-9psi and not a whole 14 blowing apart my motor

 

The C32 injectors will be fine!

I'm not sure about the 78mm fixed pulley. I haven't heard of them being used on the M112K (or if it's meant for an M113K). The stock pulley combination is a 154mm crank pulley and a 74mm clutched supercharger pulley. I'd stick with that, then you can run a stock ECU tune, and you'll have more power.

 

Im pretty sure that m113k pulley. I was debating on selling my motor from my srt6. As for adding boost for a NA block your better off using a m112k ecu. m112 ecu doesn't calculate boost (or cant see it)

 

Heya ^<^ I wouldn't say the m112 ecu can see "boost", but it can read MAP above Ambient and trim the engine by itself. I have the supercharger and bigger injectors installed and its running just fine (I need new o-rings for the injectors though I rushed and made an oopsie) on the stock m112 ecu. I have 2 codes now, EGR and SAI (exhaust gas and secondary air injection). In the near future I will be installing a piggy back but I'm loving how far I can push this ecu so far (and yes it's much faster). As for the 78mm pully I special ordered it from v-tech by contacting them through facebook.
If it makes any difference (and it probably does) its a 2002 w210 e320

 

we tune as well, 🤷 it doesn't detect boost

 

So how does it trim the engine? Is it all from MAF? :0

 

smh your missing the whole point. anyone can add fuel and timing to make m112 swap work. Having it work properly is another thing. What about map sensor ? Seem like putting a fix pulley on it having it boost all the time is *cough * the proper way.

Why you think Josh told you go with m112k ecu?

 

The stock ECU for the N/A 3.2 is a MAF based system. It only sees airflow, not MAP. The "K" engines all used a speed density (MAP) ECU setup. What you are currently seeing is a combination of the overhead that the MAF has (which isn't enough for the boost you are running) and the SRT6 injectors (I believe) you are running. I am 100% sure the car runs, but I am also 100% sure that a piggy back will not solve your problems. The MAF itself is rapidly going to become the choke point for your setup. A 74mm MAF from a V8 car might help a little, but you will always be out flowing it, not to mention that the MAF is not meant to deal with the turbulence that a supercharger will induce, giving inconsistent readings. There is a reason that people need to swap to the ME2.8.1 ECU, and it's not because they like spending money.