TunerPro User Forum

aboutton wrote:what MAF are you using ?
injectors size ?
Fuel pressure ?

Stock e36 m3 s50b30us MAF (for now)
80lb injectors
3.5 bar

How do I properly scale the maps in a 506 bin for larger injectors? I tried a couple things after searching the forum and the engine still seems to be too rich to start.

Hairyscreech wrote:Is the S52 not a US M3 engine? Are the S52 engines the OBD2 ECU and the US S50 OBD1? As the US M3 uses the 413/506 OBD1 ECU I have been working with.

The S52 is in the 96+ US M3 and is OBD2 using the MS41.2 ECU I believe. All earlier S50US M3s are 95 model year.