MembersPage/AudiKeJetronicOut (2016-08-26 16:40:23)

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)

If tuned in August, might need some tune adjustment in the winter.


Sensors


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


Notes

Factory harness schematics:

https://www.vems.hu/~vemshu/files/MembersPage/MarcellGal/Audi/KEjetronicOut/

Most appropriate is apparently [Audi100 90.pdf p4]

old:

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 ?

[this page] suggests 134 cc/min 96.43 gram/min

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 ?

Injector pinout:

Currently no idle valve connected.


35 pin Pinout