MembersPage/KevinBlack/PorscheTurbo (2012-03-14 06:15:40)

Porsche 911 Turbo 6 cylinder engine, engine unknown but had the Motronic from the 3.2 engine running before vems install.

The engine is similar to MembersPage/MacB


Update: the car is running on 1.1.98 fw. Good job guys!

For the c129 signal, divby43, 1.1.98 (17-Jan-2012 or newer) firmware needed from [developer testserver]



Trigger setup:

Flywheel tooth and flywheel pin triggering, flywheel is 129+1.


ECU Info:

ECU#4215 vr/vr trigger(auditrigger non camhall)

Flywheel Tooth Trigger to EC36-27

Flywheel Pin Trigger to EC18-12


Here's link to 911 Workshop Manual, years 1984-1989: http://www.cannell.co.uk/911_72-89_Workshop_Manuals/84-89%20Workshop%20Manual.pdf

Maybe there's some info on 911 Turbo as well.(MembersPage/PeepPaadam)



  • 115k Triggerlog is here, scope screen is below
http://www.vems.hu/files/KevinBlack/3000%20OK,%204000%20Trigger%20Error%20115k%20Baud%20v3.3_u004215-2012-03-13-10.55.15.triggerlog
  • note: anything after "auditrigger with third trigger input software "camHALL scope" (2011-08-02) will NOT work, so 1.1.96 and 1.1.97 will NOT work (at all with this trigger, see GenBoard/UnderDevelopment/FirmwareChanges ). 1.1.95 should work (we didn't tested it)

Secondary Trigger:

are we certain that sectrig VR is not accidentally inverted ? Picture of Trigger on scope:

Flywheel%20and%20Dowel%20Pin.JPG

The primtrig has a lower-frequency component (which can cause runout at higher RPM and could explain the symptoms) of unknown source.


We also tested with no divider (tooth width=2.75 deg): it worked, but peak-RPM would likely be limited.

This special case of auditrigger worked on bench, including the per-cyl delay, but only after tricking "divider-off, than "divider-on" (so we're working on initialization change, needed so it syncronizes without this trick, currently stuck in tooth_cnt=FF and wouldn't spark without this hack).

Per-cyl ignition delay is needed (because 43/3 != 14). Note: RPM reading might fluctuate, so divby43 is better choice