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911st 911st is offline
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Join Date: Jan 2004
Location: Sacramento
Posts: 7,269
Originally Posted by WinRice;5139396 ... Something like a MegaSquirt controlling a fast stepper motor, connected straight to the plunger...[/QUOTE

I thought of the stepper motor thing to.

Controlling an injector or frequency valve is easier for most and most controller can do so.

Dose the MS control a stepper motor?

How about just bypassing the metering pin with injectors or frequency valve and use the injectors to pass fuel around the metering pin instead of moving it up and down.

Mod the fuel pin so fuel can enter from the top of the FD and flow down into the upper chamber metering slits. Mill it on three sides to do this.

Put a spring above the metering pin to keep it at the bottom of its travel.

Remove the arm and mod it so the CO screw can still be used to set CO at idle.

Attach a fuel line to the top of the FD where the control pressure fitting was. Enlarge opening if needed.

Attach/Tee in a fuel line to the fuel supply line to the FD.

Put a bank of injectors in line between the fuel supply connection and the top of the fuel dist.

Use EFI system of your choice.

Idle fuel will be supplied as normally from fuel going around the fuel pin. Fuel above that comes down from the top of the metering pin as supplied by the injectors.


Last edited by 911st; 01-21-2010 at 04:27 PM..
Old 01-21-2010, 04:25 PM
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