MembersPage/IgnjatRNN (2010-10-28 17:13:02)
Yugo C20LET

YugoLET.jpg

My first page here will be actually my last project. It's a small car made in Serbia with well known c20let engine from Opel Calibra turbo. Goal was to make a car run as it should with Vems in less than ten days (tenth day was drag race in Osijek, CRO). All wirings were made according to Phat Bob guide, like all others car I installed Vems before, luckily without any problems. Harness was made of 0.75mm2 automotive grade wire, with exception of ground wire 6mm2.

MAP and MAT sensor used for this install was Bosch 0 281 002 401, same from webshop, with difference in range of it. In webshop you can find it's 300kPa sensor, while actually its 330kPa sensor.


  • Primary Trigger

Secondary trigger was taken from Astra F GSI which uses DIS module.


Ignition subsystem was wasted spark DIS module droven with two IGBTs.

Injection was fully sequential, made also according to PhatBob guide, with Siemens DEKA 630cc injectors used, and with 30v flyback diode installed.

Firmware used in this case was 1.0.78 because of possibility of using ignition retarding when using NOS, with only input configured.


Two more inputs were used for launch control and flat shift (aka shift cut), configured to cut only spark while shifting gear, with 250mS used as longest period of cutting. Be careful when playing with launch control, you could destroy your exhaust system, dramatically shorten turbos life and make very high EGT



VW Corrado VR6 Turbo


Fiat Coupe 20VT

  • Wiring

Wiring for VEMS is temporary made of OEM engine management installation (will make new once).

  • Making of new wiring harness in progress. It's a bit harder job than I had it in my mind. FIAT wanted to put a bit more wire than Coupe needed, so now I'm trying to make some sense of those spaghetti :) Some strange misfire begun in last few days, first about 250 kPa, than 240, another day 230, 220, 200...
  • New harness is finished today. Misfire was probably caused by broken COPs. I changed them with VAG active COPs

  • Ignition subsystem

Fully sequential COP, OEM COPs used

  • Now VAG active COPs used. Removed IGBTs, no need for them any more.
  • Even with "old type" of VAG COPs i had very weak spark, so I needed to lower resistance between VEMS and COPs. Now it's very strong spark, and no problems in boost anymore.

  • Trigger
  • VR Sensor
  • 60-2 Crankwheel
  • HAL secondary trigger

  • Fueling
  • Siemens DEKA 630cc/min
  • Walbro 255
  • OEM FPR

Fiat Coupe 16VT

Can you tell serialnr of this VEMS ? So we can get some idea of its history. Btw, nice progress. Mention your URL for any WebShop order / discount negotiation.

Yes, I'm holding it right now in my hands. It's 2322. v3#2322 was sold as a board (so home-assembled).

  • Trigger
  • VR Sensor
  • 60-2 Crankwheel
  • no secondary trigger at the moment, need to make something. I'll probably try to make it with hal sensor from webshop
  • Fueling
  • Need to make sec trigger for sequential injection
  • Simens DEKA 630cc/min
  • OEM FPR and Fuel Pump
  • Ignition
  • OEM wasted spark coils droven with two IGBTs

Escort RS Cosworth



Kadett D MV6



Fiat Punto 1.4GT gt2871r



Tuned Yugo 55



Kadett C C20XE



Highly tuned Suzuki Swift GTI



Mitsubishi Lancer EVO 8