E36 Turbo Questions

Hi all,

few questions and appreciate your input.

I have purchase ecu link/ re wired the car and started it . Now part of me think just get the injectors and set the base map using the 900cc injectors bosch ev14 with ev1 connector. This will be an overkill for standard engine however my thought is, it will help me make the build easier when I put the turbo in so it should be matter of adjusting the table then.

My aim is to build the car into 550hp however getting the 900cc in case I decided to forge and push for more. I have read with the bosch ev14, you should be able to get an ok idle

secondly, what regulator do you recommend ? msv or turbo smart?

third, my link ecu has no cover currently as my old ecu was siemens and bought loom etc for m50 ( bosch m3.3.1) so can run link ecu. what do you guys do in such situation ? get plastic ip 65 and mount it there? I can pay someone to 3d print a case but won't be cheap.

Re fuel pump, does walbro 255 work in e36 well?

also e36 has two exhaust manifold all the way to the end. would you use one wide band sensor in one bank( cylinder 1-3 or 4-6) or use a cross pipe and install it after? I am thinking of replacing whole exhaust system with a single 3 inch but for now, I thought of installing it on bank 1(cylinder 1-3) until I either weld a cross pipe in or run a three inch all the way

finally, I have massive about of breathing from the catch can which is currently into air. It is filtered but still significant even with engine in idle. my thought was run it back to sump or leave as is. what do you think? is there a baffling kit or something to put in the cylinder head reducing such blow by ?

If you have a 2.5 or 3.0L engine I would expect you will be fine with 900cc injectors provided they are genuine unmodified bosch items. Although you probably dont need 900cc. 650cc would do 550HP with 6 injectors on petrol.

I have never heard of an MSV regulator, but the Turbosmart FPR800 & FPR1200 have been one of the best road car regulators around for quite a few years. They have recently changed to a newer generation which I haven't tested.

I would have thought being in the UK you would find a second hand ecu to rob the case from pretty easy. Im pretty sure most of the Motronics from around that era had the same case, M1.7/M1.72/M3.1/M3.3 etc. E31,E32,E34,E36, even some later ones like E38.

Example: https://www.ebay.co.uk/itm/265116793611

I dont have any experience with fuel pumps n E36, but a 255 would be stretching to flow 550HP.

"also e36 has two exhaust manifold all the way to the end. would you use one wide band sensor in one bank( cylinder 1-3 or 4-6) or use a cross pipe and install it after? I am thinking of replacing whole exhaust system with a single 3 inch but for now, I thought of installing it on bank 1(cylinder 1-3) until I either weld a cross pipe in or run a three inch all the way"

You haven't mentioned what engine you have but since you mentioned a seimens ecu I think that would point to either a M52, S52 or euro S50. If you have the M52 or S52 then I would be happy to start with the lambda probe in a single "bank". If it is the euro S50B32 with ITB's then it would be better to have a sensor in each bank or have the sensor in a balance pipe to get an average of all cylinders. You usually find quite a bit of cyl to cyl variation around idle and cruise with ITB's.

"finally, I have massive about of breathing from the catch can which is currently into air. It is filtered but still significant even with engine in idle. my thought was run it back to sump or leave as is. what do you think? is there a baffling kit or something to put in the cylinder head reducing such blow by ?"

If it is breathing heavy even at idle then you have a mechanical issue, there should be barely be a puff at idle, or even a vacuum if the PCV system is still in place.