MicroSquirt.com read only forum (Jan.15,2018)

The plunger is NOT directly controlled by the PWM valve on CIS-E. The only thing that's attached to the plunger is the airflow plate. The PWM valve alters the control pressure, which alters the air/fuel curve by altering the resistance to movement of the plunger by the airflow plate. Controlling ...

Questions 1 and 3 are assuming a familiarity with the ford injector.


Sorry - the Ford CFI injectors are basically (very) large Bosch style injectors with different ends - they can flow upwards of 50#/hr a piece. And they can be modified to standard ends.


And it would be super cool, to try ...

As for controlling CIS without the plate. You can simply use a MAF sensor in place of the plate. However, you still need some way of controlling the plunger through it's whole range of movement, which leads you straight to needing a fast, accurate servo with the appropriate stroke, which costs big ...

A tangential comment...

With CIS, you can't really control the amount of fuel going into individual cylinders. Doesn't that somewhat defeat purpose of EFI?

That's not exactly true. On some (most?) CIS fuel distributors there is a trim screw that will adjust pressure for each injector ...

I think he means fuel pressure accumulator. These were used on CIS systems to maintain pressure during shutdown and eliminate hot start problems.

Anyone?

Bueller?

I have a set of trashed 36 Dellorto DRLA's that I am going to convert to throttle bodies (see pics on This Thread . Has anyone done this, and what were your experiences.

Here's what I'm thinking:

1) Gut carbs of all but the body, throttle shaft and plates, bleed/balance fittings, and top plate ...

I'm home for the holidays and I dug up my Bosch FI book by Probst. The "frequency valve setup actually does control the plunger position, but indirectly. It alters the control pressure, which moves the plunger a small amount to trim the AFR.

KE jetronic doesn't regulate control pressure at all. It ...

Over at Shop Talk Forums we are discussing the possibility of using MS as a controller for a CIS or CIS-E system. One guy already is using some rigged electronics to control a CIS-E frequency valve, but he wants to move to MS control down the road. My ideas are more ambitious: get rid of the CIS air ...