injector duty cycles

[dzorde at aesprodata.com.au]

     either that or a bit lean at the top end.


______________________________ Reply Separator _________________________________
Subject: Re: injector duty cycles
Author:  diy_efi at coulomb.eng.ohio-state.edu at INTERNET
Date:    12/5/96 11:18 AM


At 08:22 PM 12/4/96 -0500, you wrote:
>> I find that at WOT my injectors go greater than 99% duty cycle for most 
of the
>> time. The ECM is a GM SFI unit (Buick Grand National). This high duty 
cycle is
>> common at WOT. The ECM does send out a token closing "blip" that keeps 
things in
>> true SFI mode; essentially the injectors are just serving as holes in the 
fuel
>> rail at WOT.
>> 
>> Todd    Todd_King at ccm.co.intel.com 
>
>Thanks for the info. Is this a stock engine? Are the injectors peak and 
hold type?
>
>
I gather that at 2000 RPM with WOT  you're pumping in the same amount of 
fuel as you are at  6000 RPM with WOT????  100% duty cycle with 
(essentially) the same fuel rail pressure.  Seems like we're going to run a 
little fat down low, boys.  Help me out, here.
     
     
                   Bill