MembersPage/KevinBlack/InjectorFlyback (2008-06-15 00:26:09)

Flyback and Injector Driver Options Discussion.


Update

I am running an FJO Injecor Driver unit on my latest project: MembersPage/KevinBlack/VWGTI16vAnotherOne


Intro

=> Bosch has very nice 1600cc high impedance injectors.
  • I did not see this comment until today. Thanks for the input.
  • There is a user trying these with no resistors (the Bosch 1600 cc injectors are 5 ohm) and I am waiting to see the result.

Link to Injector Spec Database, additions welcome: MembersPage/KevinBlack/InjectorSpecDatabase


  1. Diode/resistor
  2. Powerflyback
  3. PWM
Please share your thoughts on each setup below.

I found this: MembersPage/HansK/SuzukiSwiftGTIMK/FlyBack So far 30v transient Suppresor diodes and 6.8 ohm resistor seems to be the best setup for Low-Z.


Talking Points

1)What is the best injector control setup for low-z injectors?(Delphi 96#,Siemens 83# and 72#,Bosch 160#)

  • Marcell said: I would definitely use high-Z injectors, and 30V transient diode flyback. That's the easiest to tune, and most smooth idle. It's very easy to bypass the 30V with powerflyback, if one has to tune a setup with low-Z injector in some occasion.

2)What about running an external injector driver? (FJO brand)People with OEM ecus report better idle and more HP can be made with a given size injector with a peak and hold driver.

3)How do the other ecu companies control low-z injectors? Why do they not need flyback protection? Can we get a true peak and Hold driver for the VEMS?

4)Anybody using Honda or DSM OEM resistor boxes? These often wire to the + side of the injector, one wire in and 4 out. The OEM resistor boxes mount easily,usually have a heat sink, and can be found cheaply.