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'''1991 Audi 100''' (2.3L/5cyl 2 valve NF engine.) originally with KE Jetronic (weird, many older engines had proper fuel injections; this might be the last KE-Jetronic engine built) * fuel rail fabricated * will be kept NA (normally aspirated). 139 Hp ? Smooth and clean running and fuel economy is main target (not power) ** factory compression ? Around 9.6 ? * KE jetronic => replaced with VEMS (speed density setup, 115 kPa MAP sensor) ** owner planned to "alien-log" the factory ignition advance table. However, there is almost certainly no value in that table. Should not be big deal to make a better igntune (for RON95 fuel). Probably the orig is tuned for pessimistic lower RON fuel * ditributer kept for now * either 35pin factory connector kept, and VEMS made with frontplate for that connector '''NOT feasible, because one connector is for ign, other for fuel, better cut off...' ** => '''wires cut and EC36 + EC18 connector crimped''' the way to go ** new '''harness branch:''' 12V + 4 wires from EC18: '''for LSU4 wideband sensor''' ** there are a couple of extra wires, eg to the air filter (originally flap type air-mass / air flow sensor; not needed) If tuned in August, might need some tune adjustment in the winter. ---- '''Sensors''' * MAT ? * WBO2 will be added * knock ? Does the block have provision for 2 bolts ? ---- '''A/C''' compressor is in, but was not operated for some time. Needs gas, most likely (or was it washed and changed to R134A ? dunno) ---- '''Carbon canister''' ---- '''Trigger''' * primtrig: 5 window HALL (on camshaft, in distributer) * sectrig: HALL (not used for now) ---- '''Notes''' Factory harness schematics: https://www.vems.hu/~vemshu/files/MembersPage/MarcellGal/Audi/KEjetronicOut/ Most appropriate is apparently [http://vems.hu/files/MembersPage/MarcellGal/Audi/KEjetronicOut/audi10090.pdf Audi100 90.pdf p4] old: https://www.vems.hu/~vemshu/files/MembersPage/MarcellGal/Audi/KEjetronicOut/nf01.jpg ---- '''injector''' Bosch 280 150 716 (donation from some BMW) We do not know exact fuel pressure, the regulator is from some 6cyl Opel, we assume 3.5 bar (squareroot rule => sqrt(3.5/3)=1.08 so 8% fuel difference from 3 bar) cc/min ? recommended cranking pw at 20C = 10 msec ? ** Or req_fuel for VE=100 or VE=200 ? [http://www.gomog.com/allmorgan/InjectorRatesBosch.html this page] suggests 134 cc/min 96.43 gram/min * 21 msec ... enough for appr 6000, and since VE drops, enough for redline (6500 RPM on this engine) ** prolly 15 .. 18 msec (at 100kPa) when warm, and 20..24msec at 25C coolant. '''We chose req_fuel=10msec''' and fill VE to around 160..180 initially VE <0.9 (prolly 0.7) even at max torque, since this is a 2 valve head. 460 cc / cyl, 34mg fuel, 500 mg air 552 mg if VE=1.0 5 injectors enough for 139 Hp ? 100 kW ? * 12.75 lbs / hour ** so 130 .. 140 Hp with 5 injectors, depending on efficiency (0.45 .. 0.5 lbs / Hp / h usually). Prolly limiting to 6000 RPM or 6100 RPM, this is not a racecar. Injector pinout: * cyl1 inj-A EC36/7 * cyl2 inj-B EC36/19 * cyl4 inj-C EC36/8 * cyl5 inj-D EC36/20 * cyl3 inj-E EC36/9 Currently no idle valve connected. ---- '''35 pin Pinout''' *1 white-grey ICU5 *2 brown-white AFP/2 *'''3 black-red CLT NTC/2 temp sensor (coolant out from cyl head)''' *4 red-yellow KJET pressure control *5 red-white KJET pressure control *6 blue-green EGR TEMP sensor (?) *7 ... *... *'''14 black-green Fuse 26 node15, ECU 12V ?''' * ... *'''18 GND''' *... * '''30''' => ICU .... HALL signal *'''35 brown-red GND'''
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