Almost done with build and I need some help. Swapped and boosted e36 m3.

[E30round2]

I am swapping a m50b25nv into my 95 m3 chassis, and I need a few questions answered.

Important Info:
I am using the engine wiring harness that came with the m50.
I purchased the long block with no knowledge of its condition. There are some things I have no way of knowing.

Does the 20 pin connector need to be repinned at all? It fits obviously, but I want to make sure the right things get connected.


The relays pictured are on the opposite side of the engine bay compared to where they were on the s50 harness. I planned on mounting them near their current location and running like that. Will that be ok? Also, it looks like I am missing a relay. It was like this when I bought it. Lastly, the terminal post on the end... I believe it is where the oxygen sensor heater relay hooks up? Which I no longer need. I just want to make sure.


This just grounds to the chassis correct?


The connector i'm holding here... What does it connect to? Sorry about the relays in the background.


Does this connect to the power distribution block?


This is the clearance between my RSI manifold and the inner fender. I just want to double check that this is enough before I torque everything down. I have brand new oem engine mounts and poly transmission mounts if that matters.


Lastly, here is a pic of the engine bay as of tonight.


Please don't give me too hard a time about putting a non vanos m50 into a m3. The engine was originally going to be used in a simple e30 project, but I got a great deal on this m3 (that needed an engine) and thought why not.

The goal is 500 whp on pump gas. I'm guessing roughly 20 psi. Likely meth injection.

It's got:
Block and head machined
8.5:1 Wiseco pistons
Eagle H beam rods
Cut ring head gasket
ARP head studs
RSI manifold
Literally new everything... I spent a lot of unnecessary money to be honest.
Borg Warner 275 sx-e turbo .63 A/R
CX-Racing intercooler kit (modified)
Tial 50mm BOV
Tial MVR 44 wastegate
VEMS standalone

Thanks in advance for any help, and if anyone has any questions or want to see more pics just ask. I have been working on this project for a year and a half now, and I am so excited about the first startup!

[m3boost]

I would just get an obd1 wiring

[E30round2]

They are both obd1

[m3boost]

They are both obd1

Im sure they are, but I was referring 93-95 wiring harness. Not really sure if the pin-outs are any different other than the vanos wiring between a vanos wiring and nv wiring.