Planning VEMS 3.3 for turbocharging BMW M50B25 engine in an BMW E36. Lives in Sweden Gothenburg.
M50b25
- 2500cc
- 6-cyl
- 24valve
- Vanos removed
- Firing order: 2-4-1-5-3-6
- Wasted spark
- Hp goal ~400hp@1bar
Enigne Spec:
- M50b25 without vanos
- Je Forged Pistons Compression 8,1:0
- MLS headgaskset 1,8mm
- ARP headstuds
- 500cc injector high-z
- Preicison Turbo SC-44
- Tial 38mm wastegate
- 50mm PPF blow-off.
- 600x300x75mm intercooler
- Sachs heavy pressureplate 240mm
- Organic disc 550nm
- Walbro 255l/h fuelpump
- Primary trigger: VR
- Cam Trigger: VR
Ignition trouble
The problem was observed today when I was checking the timing.
I had only strobed the timing on the starter before, but today i strobed it on idle. Firmware: 1.0.36 and also 1.0.23 was tried with the same result. I'm using dualout and highboost. The actually timing is totally of the timing value set in MT.
Result with trigger tooth=4 and TDC after trigger=61
- Timing in MT | Actual timing
- 0 - 0
- 17 - 36
Result with trigger tooth=5 and TDC after trigger=64
- Timing in MT | Actual timing
- 10 - 3
- 17 - 17
- 25 - 32
This test was on idle @1000rpm +-/40, @45KPa. The timing fluctate +-1 degree. Would appreciate if someone could help me with this weird problem.
- msq - http://83.227.224.152/bmwturbo/andreast.msq
- config - http://83.227.224.152/bmwturbo/config.txt
- tables - http://83.227.224.152/bmwturbo/tables.txt
---
Pin out:
| Function | EconoSeal pin |
| Sensor power 5V | 36-28 |
| Sensor ground | 36-26 |
| Power ground | 36-5 |
| Power ground | 36-21 |
| Power ground | 36-22 |
| Power ground | 36-32 |
| Flyback | 36-23 |
| injector 1 | 36-7 (Injector A) |
| injector 2 | 36-19 (Injector B) |
| injector 3 | 36-8 (Injector C) |
| injector 4 | 36-20 (Injector D) |
| injector 5 | 36-9 (Injector E) |
| injector 6 | 36-18 (Injector F) |
| CLT | 36-14 (CLT Coolant Temp) |
| IAT | 36-2 (Intake Air Temp) |
| TPS | 36-1 (TPS signal) |
| TPS 5v | 36-28 (TPS +5v) |
| IAC | ? |
| Crank position sensor (vr) | 36-27 |
| Cam position sensor (vr) | 18-13 |
| knock signal A | EC18-2 |
| knock signal B | EC18-3 |
| coil1 | 36-35 (Coil #1) |
| coil2 | 36-33 (Coil #2) |
| coil3 | 36-34 (Coil #3) |
| coil4 | 36-11 (Coil #4) |
| coil5 | 36-24 (Coil #5) |
| coil6 | 36-10 (Coil #6) |
| Fuel Pump Relay | 36-15 |
| nernst_cell | 18-13 |
| heater - | 18-18 |
| pump - | 18-7 |
| pump + | 18-9 |