duty cycle of injector

[Roger Heflin]

To add to what bruce said.  It depends on alot of things.  If you have an
auto the duty cycle will be different in gear, the duty cycle will be
different if you turn on the AC, and if you install bigger injectors the
duty cycle will get lower, and the same will happen if you raise fuel
pressure.  Really the only thing you can say is somewhere between 1ms and
3 ms generally with most vehicles.  My vehicle stock was 2.5 ms, after
some modifications and bigger injectors it is now more like 1.8ms, this is
out of gear idleing.  The numbers change with different loads.

					ROger

On Thu, 20 Aug 1998, Bruce Plecan wrote:

> 
> -----Original Message-----
> From: Sergey Stopov <efi335 at hotmail.com>
> To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
> Date: Thursday, August 20, 1998 9:19 AM
> Subject: duty cycle of injector
> 
> 
> >Does anybody know what duty cycle of injector is at idle - typically for
> >GM (not TBI) road cars?
> >Sergey.
> >Thanks!
> 
> Well, interestingly enough, yesterday the bench ecm was showing
> a 2ms pulse at idle (500-800 rpm) on a system that fires once per
> crankshaft revolution.  Then also heard of one running at 1 ms.
> Very general I know, but at least some clues.
> Cheers
> Bruce
> >
> >
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>