Re: Duty Cycle and VE ??

[Squash <realsquash@yahoo.com>]

My injectors are 38lb/hr and the injector size is set to 38lb/hr.  If I set the constant to around
44lb/hr (that is about what 38's are at 60psi), it should lean everything out, including the spot
that needs more fuel, so that won't help me.  That's if my VE is under 100%, i assume.

I don't have the PW and TPS data with me, but i recall 2.3ms PW and 40-60% TPS.  But it doesn't
help if I don't have the actual values.

Squash

--- Roger Heflin <rah@horizon.hit.net> wrote:
> 
> 
> On Tue, 27 Jun 2000, Squash wrote:
> 
> > I'm very confused right now.  I have my VE's around 2000 rpm set to 99%, but at 50+ kPa it
> runs
> > lean, really lean (at 1900-2100rpm I get 60-100mV continually).  My injector constant is set
> to
> > 38lb/hr and i'm now running 65psi fuel pressure, so I should bump my constant up to correct.
> 
> What do you mean by bump up your constant?  How big are you actual
> injectors?   And there is no way you are maxing out your injectors at
> that low of rpm, the injector open time available gets larger the
> lower rpm you go, the ones that max things out are taking the rpm
> higher.
> 
> What kind of pW are you getting at thos rpms and what is the throttle
> position?
> 
> > 
> > I've looked through the archives for duty cycle math, but i'm still not clear on it.  I need
> to
> > figure out if i'm maxing out my injectors or if my VE could possibly be over 99%?  I know that
> > full-throttle at 50psi FP/5000 rpm was around 10ms PW and around 850-900mV.
> > 
> > Could this be caused by an ignition timing problem?
> > 
> > Squash
> > p.s. 730/aujp/468cid/NA/525ish HP/38lb injectors
> > 
> > =====
> > Trains, Trucks, and EFI at http://www.trailrunners4x4.org/users/realsquash
> > 
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=====
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