MembersPage/PeteKrgr (2015-01-01 07:00:00)

Building a Porsche 3,0l 944 turbo

Now the details that affect VEMS specs and installation.


Trigger

Porsche 944 turbo trigger:

I.e. trigger is 132+1


Shopping list

Assembled v3.3 controller


Specifications:

Board_version=v3.3

Serial_nr= 748

pump-= 4.16V

wbo2_pump_pw_zero=0x67

wbo2_nernstdc_target=0x86

pump+= -3.3mV/200 Ohm

AREF=4.9V

(C103=1nF, no D100)

Firmware 1.1.24

http://www.vems.hu/download/v3/firmware/

This is how I made the version of MegaTune I'm currently using ( got these instructions, I didn't make them up myself ). There was a conflict inMegaTune's files, which caused erratic PW indication. It was solved with this:

I downloaded http://www.vems.hu/download/v3/firmware/v3_firmware_1.1.24.zip, unzipped and copied doc\megatune\vemsv3.ini -file. Then I downloaded http://vems.hu/www.vems.co.uk/VEMSTech/VemsMT1.1.23rc.zip, unzipped and wrote over MegaTune2.25\mtCfg -folder's vemsv3.ini -file with that previous .ini-file.

Part of config, I'm running this trigger with div_by_2 with these settings:

primary_trigger=C3

secondary_trigger=19

tooth_wheel=42

trigger_tooth=01

another_trigger_tooth=21

crank_minper=33

tooth_wheel_twidth1=16

tooth_wheel_twidth2=00

cam_sync_r_edge_phase=00

cam_sync_f_edge_phase=00

reset_engphase_after=40

ign_tdcdelay=2C

ign_dwell14=27

ign_dwell6=CC

ign_crank_advance=20

ign_out=70

ignchmax=03


Auditrigger was initially according to PhatBob's instructions:

EC36#27 VR+ ( primary ) = CRANK speed sensor

EC36#13 VR+ ( secondary ) = reference sensor (whel HALL!)

EC36#26 VR- ( primary & secondary )

but changed to

EC36#27 VR+ ( primary ), = CRANK speed sensor

EC18#12 VR- ( secondary ), = VR reference sensor

EC36#26 VR- ( primary )

EC36#26 VR+ ( secondary )

after discussions with Miska. So installation instructions should be updated considering this part.


Configuration:

MembersPage/PeteKrgr/Config

Tables:

MembersPage/PeteKrgr/Tables

Some files:

http://www.vems.hu/files/MembersPage/PeteKrgr/VEMS+check+files.zip

Not the latest ones, but from the beginning of Dec/07.

Pictures:

MembersPage/PeteKrgr/Pics

History:

MembersPage/PeteKrgr/Oldstuff


Update 16-11-2007

Finally I've managed to get the car idling well, there's been both mechanical and program related problems. Now triggering issues are solved and VEMS is definately suitable also for this kind of installation.

I would like to thak all those who have helped me with my project!!

Next update will arrive as soon as there's something to update...


Issue report 13-12-07

Engine idles well and is tuneable, but stalls when trying to increase rpm. It doesn't matter if you try to open the throttle slowly or rev it. 1600-1800 is the borderline, no rpm higher. Idle limit is exceeded ( 3 vs 7 % ). From links above can be found almost all relevant data, except scoped trigger signal. The data is not Thee latest one, but the phenomena is there. There's also VEMSLogger files and two trigger logs, one from cranking and and the other one when it stalls. I'll try to post more data, including the mcd.txt, in the near future.