Hi i am new to the list and i have a cpl of ??'s

[Bruce]

Just hook a dwell meter to it.
You only *need* to know it during developement work.
Bruce

From: "David Hunt" <bamainc at home.com>
Subject: Re: Hi i am new to the list and i have a cpl of ??'s
> How useful would such a circuit be?  Would an LED readout be adequate?
> dh

> From: "Matt Cramer" mac9 at po.cwru.edu
>Subject: Re: Hi i am new to the list and i have a cpl of ??'s
> > At 04:33 PM 7/28/2001 -0500, you wrote:
> > >I have an EFI toyota supra 87 model and i was wondering how could i
> measure
> > >the injector duty and make my own little gauge for it??
> > >And about how many people are on this list??
> > >Brett Downs
> > >
> > Well, I'm somewhat new to EFI myself, so you more experienced guys,
> > correct me if I'm wrong here.  The easiest way I can think of to measure
> > duty cycle would be to hook an oscillosope up to one of your injectors.
> > The duty cycle is the fraction of the time where the injectors are
> > recieving power.
> > Or if you want a device that measures duty cycle alone, rig up a circuit
> > that averages the voltage supplied to the injector over time.  The duty
> > cycle should be about equal to that average divided by the peak voltage.
> > I'm not sure precisely how I would build a gauge to do this, though.
> >
> > Matt Cramer


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