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Crasher

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Everything posted by Crasher

  1. Crasher

    Audi 5 cylinder

    Sorry, only just had a reply notification. It has a Control Pressure Regulator which is both electrically and engine block transfer heated, as the temperature increases the pressure increases and this forces the plunger in the fuel distributor down, covering the fuel slots and reducing the flow of fuel. The frequency valve bleeds off the control pressure so you can increase fuelling on demand. VAG used them with the control pressure set higher so the valve could +/- fuel.
  2. Crasher

    Audi 5 cylinder

    A fixed dizzy is no problem. The system runs at 5.5 Bar and I have used a ballast resistor on these valves for decades but I don't have one to hand at the moment.
  3. Crasher

    Audi 5 cylinder

    I need to equip a 1986 Audi 5 cylinder 10v K-Jet engine with wideband self learning Lambda control using an LSU4.9 and to control the Lambda by operating a genuine VAG retrofit frequency valve that intercepts the control pressure; basically it is an injector with a hose and coupling on it and can be used to adjust the control pressure +&- within a small window, enough to keep lambda 1 for a cat. I used these years ago with the Racelogic V-Sam so I know they are low impedance and require a ballast resistor; I found out the hard way! Additionally I would add an air flow sensor plate position sensor, MAP, IAT and CTS sensors plus the throttle body has shut and WOT switches; the addition of knock detection would be very nice. The Bosch dizzy is vacuum and centrifugal timing control and hall sender. What I don't know is if I can intercept the dizzy output and tweak it or do I have to use a non advance dizzy (technically possible but awkward) and scratch buo a 3D timing curve and use say an Atom ECU to control the frequency valve using the signals provided AND critically intercept and modify (or not) the G40 signal. This would be almost like a classic "piggyback" installation like I used to do with the V-SAM, does anyone have any idea if this would work? The reason it needs to be kept simple is the owner hates complexity and electronics so the engine bay aspect needs to look quite OE plus when finished, the car is being shipped to NZ as the owner is returning home so he would have some support available in the ECU's homeland. The actual reason for the unit is the engine is being taken from 2.2 to 2.5 litres with a big valve head and mild cam, the metering head has been professionally rebuilt KMI and modified for suitable extra fuel flow but due to the unavailability of 99 RON fuel in NZ, I need to set it up for 95 RON and he needs to be able to deal with any knock.
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