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Building a '''Porsche 3,0l 944 turbo''' Now the details that affect VEMS specs and installation. *original Bosch Motronic sensors will be used **water temp x2 , oil press, knock **exceptions are MAT and MAP, these will be from VEMS web shop *original wiring loom will be used *fuel injectors are SiemensDeka **Static Flow Rate (GAS): 86 lb/hr @ 43.5PSI (300kPa) = 903cc/min, 10.88g/s **Coil Resistance: 2.35 Ohms / Low Impedance / Low-Z *Ignition for starters wasted spark, with option to COP *TPS will most likely be the one that comes with ITBs *For trigger see below ---- '''Trigger''' Porsche 944 turbo trigger: * 132teeth on flywheel -VR sensor * Crank home (1 pin on flywheel 24.5 tooth, ie 66.8 dec BTDC 24.5 x 2.7272 deg, if i remember right) -VR sensor. * No cam sensor * ''' And no missing teeth anywhere!''' *Ignition sequence: 1-3-4-2 '''I.e. trigger is 132+1''' ---- '''Shopping list''' Assembled v3.3 controller * 1-wire interface no * ignition driver 4 * Knock and EGT yes * LCD and PS2 yes * MAP connection 400kPa onboard (6/4mm pneumatic) * mounting-style screws * PowerFlyback yes * primary_trigger '''VR''' * secondary_trigger '''Auditrigger''' * EconoSeal36-Wire * Econoseal18-Wire * EGT sensor (K-type) Size 6mm * K-thermocouple connector ** mounting-style panel-mount ** Sex pair ** mounting-style flyback ** Sex pair * Wideband O2 sensor * Wideband connector ** With wire with crimped wires * MAT sensor * Pneumatic valve 3way ---- '''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/ The version of MegaTune I'm using was put together like this: This is how I made the version of MegaTune I'm currently using ( got instructions, I didn't make them up myself. ) 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 defitely 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...
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