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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 ---- '''TODO''' *Measure and make bracket for TPS *Measure and make AFM replacement pipe and hose joiners and either source top-hat adapter to keep std airbox *Wire old AFM plug for AIT/MAT sensor (neatly and reversibly) *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 (before or after) *Check best location for AIT/MAT sensor ---- '''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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