Note:

Actually (just talked to Niklas on the phone), the (oid 14955) ECU will be used primarily on M106=M30B34MAE MembersPage/BmwMHundredOsix ( separate page created to avoid confusion).

VEMS ECU (primarily M106) but possibly also:

* on BMW M30B35 engine with a kkk27 turbocharger, the original target of this page.

** MembersPage/SamSpade suggests primtrig: "stock 60-2" (several others use 60-2 config where processor senses rising edge which suggest VR, but usually forgets to mention or confirm that VR). *** Explicitely mentions "Manufacture cam sync wheel to replace distributor rotor" with the awesome [Honeywell 1GT101DC HALL sensor] (note: several others used primtrig only, with wasted spark)

** [some m30b35 related pages]

** [M30B34 search] (different engine, but might be useful), quite similar mechanically

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Trigger negotiation, please measure and update here! Any trigger modification should be planned, and documented to avoid unnecessary project delays

"If it does not fit, please let me know. "

Measure for each (trigger) sensor: if you find 2 pins that measure same resistance in both directions (typically between 300..1400 Ohm), that is VR sensor. Otherwise HALL (or optical, but HALL input needed for that too, "eg.: very high frequency low capacitance value sectrig HALL is used for nissan-trigger).

** "to measure is to know" (works even if there are several similarly named models out there).

** Please write your measurement results here.

The HALL, auditrigger trigger combination as ordered is almost certainly not good, virtually nonexistant factory combination: HALL, VR

* HALL, auditrigger is not really needed, but it can be used as HALL , VR

** HALL input could be used with VR-HALL adapter (or modified primary trigger with 1GT101 HALL sensor as in MembersPage/MattiasSandgren/BmwTwinTurbo )

** but best to order VR,VR if the engine has 2 VR sensors

** or VR, HALL if primtrig is confirmed by measurement to be VR, sectrig is custom made

** or HALL, HALL if uncertain (but uncertainty is bad, use DVM and be certain).

ECU VEMS V3 (as ordered, trigger might NOT be OK)

* primary_trigger: HALL

* secondary_trigger: OBSOLETE auditrigger w/out camHALL inverter

* ignition driver: 8

* Flyback: HighZ-only 30V flyback

* MAP connection: 300kPa (6/4mm pneumatic)

* LCD connection: yes

* Knock input channels: 2

* EGT input: 2

primary trigger: Stock 60-2 crank trigger wheel, but most likely VR (not HALL).

The trigger setup must be planned now, much easier now, than to modify ECU later.

* HALL / HALL ECU with VR/HALL adapters is "jolly joker", but that is more connections to set up (+1 or 2 small DSUB9 gadgets), avoid if possible.

** If HALL / HALL ECU is ordered with high frequency sectrig (as Nissan-trigger 360 pulse optical signal), than good connections are needed (proper, shielded cables; and external capacitor) to avoid noise.

** These are non-expensive things (we can send for free if the project is planned so we know what can be useful), but requires time to sort out, and can be time consuming (especially for the inexperienced), sorting it out NOW is 20 times less time, so ECU has optimal trigger inputs best for the actual trigger setup.

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Bmw M106 (is BMW M30B34MAE) engine and m30b35 engine are quite similar mechanically. I was unable to find any trigger information from the M106 it was used only in very old (1982-1986 E23 745i ) 7-Series body;

For the m30b35 however (delivered in many bodies but most notably the 1987-1992 E34 535.

[wiring diagram]

Page #97 seems to suggest this engine needs a primary = VR / secondary = VR ecu.

Other than trigger side, there are no uncertainties in his order (so good).

I would ask him to confirm if the trigger on his engine is indeed the OEM VR/VR as wiring diagram suggests or if he has retrofitted some HALL/HALL other option (in that case HALL/HALL might be fine).