20vcqdriver, Thanks for that, and the quick reply, sorry it has taken me so long to get back to you.
What I'm trying to do is to give my 200 turbo the advantages of modern electronically controlled fuelling while still keeping it as original as possible.
The fact that such a device as the K star did exist goes to prove that this is possible, after all the frequency valve on the early KE systems is nothing more than an EFI injector with pipes attached.
Audi used to list an ECU for "KG engines with retro fitted lambda control" I would imagine it's NLA now though.
IIRC I read somewhere that contrary to popular belief the Hitachi MAC..... series ECU's can be chipped, after all like most others they contain 2 main chips, a processor and a memory chip
The MAC 05 A in my car does have the tracks on the pcb for the lambda sensor, frequency valve, and N75 boost solenoid, but no components soldered into these locations.
Does anyone know more about these old ECU's????????
Also my fuel distributor has a weird part No 5170/18487E this is on a Bosch plate but is obviously neither a Bosch nor Audi part number, and no one from either Bosch or Audi seems to know what it is
Anyone got any ideas??????
Thanks Peter