Hello.
I have modified dw,smoke,boost,torque maps to ~70mm3 but SOI scale ends 58mm3.
bmw 530d/330d SOI scale is to 70mm3.
Can i use these 530d/330d soi maps on 525d or do i need to calculate SOI from durations(max 70mm3 stock),rail pressures etc..
soi isn't very far away from 525d

i have a screenshot of these maps but i don't know how to upload

Do not use different soi maps from different engines. Different compression ratios etc. just scale the axis up to 70mm3. It will use the last axis data anyways. You can advance it but by how much I don't know, I advanced my 330d one by about 7%

Yes they are different.
Engine code: M57D25
Bore: 80mm
Stroke: 82.8mm
Displacement: 2497cc
Compression: 1:17.5
Power: 120kW at 4000 rpm
Torque: 350N·m at 2000 rpm

Engine code: M57D30 (135kW)
Bore: 84mm
Stroke: 88mm
Displacement: 2926cc
Compression: 1:18
Power: 135kW at 4000 rpm
Torque: 390N·m at 1750 rpm


Soi is almost the same at 50mm3. I have to check after work. But i remember at 2000rpm 50mm3 the difference was under 1°
Maybe i just change the last axis like
58mm3 65mm3 70mm3
Then guess values to 65mm3 And 70mm3 Or take values from 530d

Soi maps

I would just change 58mm3 to 70mm3, then add a % change to whole column, I wouldn't even look at the 330d for reference. 70mm3 on your engine will have higher pressures than the same on 330d.

To fine tune it you should use a dyno, but you can do it by logging to a certain extent, only be changing soi, nothing else, on same stretch of road log from x mph to x mph to see if there is a difference. Once you see less difference stop adding. Very crude however.

you cannot just advance the soi. this must be worked out. you only need to advance soi if the eoi is to high. in most cases it's not need to touch soi for a stage 1 tune

You can just advance the soi. It has a sweet spot. All modern oem software has retarded soi, for emisions reasons, advanced soi creates nox. Advancing the soi also creates (if it is too retarded as oem) more torque for a given unit of fuel. You should not advance soi based on EOI. Do not go mad with soi it can loose power once you have passed the sweet spot, after that you can melt pistons etc.
People that make proper economy remaps will advance the entire soi map. This takes a lot of time on a dyno.

Remember you will also have a soi limiter map. Probably 8x16 off the top of my head.

logged some data with testo. But not sure the right ones. :D
limited by torque 65mm3. SOI still original

VE=pilot injection
HE=main injection
NE=post injection
am i right?
has anyone disabled post injection?