The main circuit uses simple comparators to make decisions based on the inputs you choose. The first link below shows you the basics behind the concept.
The Basic Electronic Comparator-Based Controller, by Russ W. Knize
This circuit uses the electronic controller for wastegate control valves. It is setup for a 3-valve system with quick pressure release, based on throttle position, but can easily be expanded.
The TPS-Based WCV Controller With Quick Pressure Release, by Russ W. Knize
This circuit uses the electronic controller for wastegate control bleeds. It is setup for a 3-bleed system with boost peak suppression, based on throttle position, but can easily be expanded.
The TPS-Based WCB Controller With Peak Suppression, by Russ W. Knize
This circuit uses the above setup, but controls the boost bleeds based on shifter position. Obvioulsy, you need to make a shifter position sensor to use this. See the Shifter Position Sensor page for more details.
The Shifter-Based WCB Controller With Peak Suppression, by Russ W. Knize - coming soon
This is an expanded version of the above circuits, using shifter position and thottle position to decide what the boost setting should be. It gives the same response as the above circuit at WOT, but reduces the boost settings when at part throttle for better driveability.
The TPS And Shifter-Based WCB Controller With Peak Supression, by Russ W. Knize - coming soon
Here, you can see how to use the controller to control fuel injectors. This particular setup turns them on, based on MAP sensor voltage. Obviously, you either need to bleed you MAP sensor or install a secondary MAP sensor that can read above 15psi to use this.
The MAP Sensor-Based Extra Fuel Injector Controller, by Russ W. Knize
This controller uses the oxygen sensor voltage to decide whether or not to turn a fuel injector on. You can combine this with the above circuit for better protection.
The Oxygen Sensor-Based Extra Fuel Injector Controller, by Russ W. Knize - coming soon
Alternatively, you can use this type of input to turn off the ASD Relay and shutdown the engine if the oxygen sensor gets too lean. It works by checking for a WOT condition, MAP sensor above a certain voltage (boost), and an oxygen sensor output below a certain voltage (too lean).
The Oxygen Sensor-Based Engine Shutdown Controller, by Russ W. Knize - coming soon
As you can probably see by now, you can combine these circuits in any way you choose to get the system you want. You can just build a large array of camparators and do with them what you choose.
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This page is maintained by Russell W. Knize and was last updated 04/26/99. Comments? Questions? Email firstname.lastname@example.org.
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