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Summary of change:
I am trying to specify a pnp system for my 1989 Porsche 964 Carrera 4 ---- The car as it is 25/06/2014 '''Mechanical''' *3.6L *6 cylinder *Upgraded "cup" cam of unknown lift and duration *Decat pipe *Permanent 4WD with centre and rear active differentials '''Management''' *55pin Motronic *Twin spark *Twin distributor *Twin coil (not coilpack or cop) *Standard 252cc/min at 3.8bar high impedance injectors (Bosch p/n 0-280-150-731 193.9cc/min @ 3bar 16ohm) *2 wire style Bosch ISV *Intake "resonance flap", vacuum actuator, electrically activated *Carbon canister vacuum switch '''Sensors''' *VR crank trigger on flywheel 60-2, missing tooth is 84 degrees BTDC *Hall sensor in distributor *4WD wheel sensor on rear diff, Hall *2x ABS wheel sensors *Cylinder head temperature sensor (NTC) *2 knock sensors *Narrowband O2 is fitted to most models, but this car had a factory option selected to remove this *Standard AFM (Flap style) *AIT (NTC type inside AFM) *Altitude potentiometer *Standard idle and wot switch (no analog TPS) ---- '''PLAN''' *To begin with I will keep the twin coils and distributors *Fit an analog/potentiometer TPS *Remove AFM and add a separate MAT. *Add wideband 02 *Convert to Speed Density (MAP) operation *Test idle and review if AplhaN+Map compensation would be better ---- '''Questions''' Continued operation of HVAC (this car does not have AC) Continued operation of ODB for ABS and 4WD diagnosis and testing Operation of "central informer" check engine light Find standard DME injector dead time table Find standard DME injector sequential vs batch fire operation Find standard AIT vs ignition retard and fuel adjust tables Check the distributor hall sensor is sufficient for ecu to camsync for full sequential injection and standard injectors will fuel adequately in full sequential mode. Check Peep will have performed O2 calibration on supplied unit Check best location for MAP sensor take off ---- '''References''' pin out here [http://site.ecudoctors.com/tech-data/Porsche_964/Pinout_964_0261200450.jpg PinOutImage] and here: MembersPage/PeepPaadam/PorscheCarreraTwo further information (some for 993 specifically) MembersPage/PeepPaadam/PorscheCarrera Injector info http://forums.rennlist.com/rennforums/964-forum/555017-need-fuel-injectors.html Standard DME coil dwell time table [http://forums.rennlist.com/rennforums/members/rogue_ant-albums-misc-picture25825-964-ignition-coil-dwell-time-in-milliseconds.png Image] http://forums.rennlist.com/rennforums/964-forum/787313-msd-blaster-8222-ignition-coil-reviews-idle-issues-3.html
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