350TPI Fuel Injectors

[Romans, Mark]

Hi Bruce:  I have my 6E software to use a sliding filter for the maf sensor
and it not
only runs better but doesn't peg the maf as early.  It now pegs it at about
4800 rpm's.
(Normally aspirated 355 cu in).  When it pegs it just sits at 254 grams/sec.
No variation
until I let off the gas.
Mark
----- Original Message -----
From: "Bruce Plecan" <nacelp at bright.net>
To: <diy_efi at diy-efi.org>
Sent: Monday, September 18, 2000 7:52 PM
Subject: Re: 350TPI Fuel Injectors


>
> Supercharged with a MAF you'll peg it at less the 2K RPM is my quess.
> Really should figure on running a 749 ecm, IMO.
> Unless you figure out how to run a late 3.5" MAF.
>
> Has anyone looked at or studied the 6E or other code to see what happens
> when the MAF overloads the input?.  On the gn list there has been comment
> that when it overflows the ecm starts over figuring the grms/sec..  So
might
> read 255 and then in the next frame 14, next 30 etc.
> Bruce
>
>
>
> > This is Rich from Texas met you in NH. Well I'm scanning my 88 305 TPI
> with
> > DIACOM and I'm trying to figure out what areas have to be altered when I
> > install an supercharger. I realize that most of the fuel maps. Has
anybody
> > had success programming their own chip for supercharger application,
open
> to
> > all. Thanks
> > -----Original Message-----
> > From: Shannen Durphey <shannen at grolen.com>
> > To: diy_efi at diy-efi.org <diy_efi at diy-efi.org>
> > Date: Monday, September 18, 2000 8:41 PM
> > Subject: Re: 350TPI Fuel Injectors
> >
> >
> > >Well, I show a 17069647, which is 22 lbs/hr for the ZR1 Vette engine,
> > >a 5235047 which is for an 85 tpi 305, no specs (maybe 18 lbs/hr?), and
> > >a big injector for a Ford 460, which I'm sure isn't yours.  I hate to
> > >make any guesses about injector correctness, but they shouldn't be too
> > >far off if WOT seems ok.
> > >
> > >Did I mention disconnecting the O2 sensor and observing how the engine
> > >behaves?  This might better indicate an actual lean or rich
> > >condition...
> > >Shannen
> > >
> > >Don Burns wrote:
> > >>
> > >> Shannen,
> > >>
> > >> You asked about the injectors on this engine. With a magnifying glass
> and
> > a
> > >> twisted neck only a chiropractor could appreciate, I can read the
last
> > two
> > >> digits which appear to be 47. The stuff in front of the 47 I can't
> read.
> > >> The injectors are black.
> > >>
> > >> I was vague befor on the ECM. Its a GM 1227730.
> > >>
> > >> Don
> > >>
> >
>
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