555 EFI competition

[TVS]

> We spend too much money on PCMs. We have a project going to design a new
>cheaper generation of EFI using a single 555 timer circuit. For our 4 cyl
>cars we trigger the 555 from cyl one spark. The 555 controls all four
>injectors and the amount of fuel injected is controlled by a variable
>resistor that doubles as a choke for cold starting.

As far as I'm aware, that the same principle as the Bosch L Jetronic.
Charging a capacitor though a variable resistance...
Do you have a web page with details of the project?
Toby.



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