Injector Duty cycle calculations

[Bruce Plecan]

OK, 165?.
Somedays, really hard just to word the guestions...........
Grumpy



> Efi...

>Subject: Re: Injector Duty cycle calculations
> > Oh.. this is not on my truck... this is race engines..
> Ya, I got that.
> > My truck was horrible from idle too 3000 where the cam started to
> work
> > My bsfc were around .475 from 3000 till 4000 then they started to
> climb..
> > and go goofy.. bounce around..
> What for fuel metering were you using on the dyno?.  EFI, Holley,
> SU,
> Carter, TBI, Webers, <g> etc?
> Grumpy
> > Subject: Re: Injector Duty cycle calculations
> > > and how wide of range did it run, a
> > > band of a couple hundred rpm or several thousand?.
> > > Usually 5500 to 7500
> > Uhmm, this was with the 165??
> > > Yes and can change in less than an hour... seen where engine was
> > > running  .39.. then set valve lash..
> > > Had storm fron coming in.. next pull it ran .45's.....john playe
> > > with carb.. got it back down to .40~.41...
> > Weather and a relash, and stuff changed that much?. That is toooo
> > cutting
> > edge by a long run for a street motor, and that rate, you could
> melt
> > a motor
> > by carrying a passenger, and pulling a long grade.
> > > I agree... seem they have problems with exaust valves:-)... run
> > > really hot...
> > Lean is watching the greenish sparks in the exhuast, and just
> > knowing that's
> > the exhuast valves leaving thru the ports (short primary pipes
> > usually
> > needed to see this).  Say a ----  one time dump sparks thru the
> > mufflers
> > once.  Hehehe, I won, he had a miss afterwards.
> > Grumpy
> 

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