J N's MiniRam backfire

[Walter Sherwin]

Sure, I'd be interested in a copy....

Walt.



> Walt,
>
> There is a full Excel spreadsheet with much more data in it.  If
interested
> let me know.  Somehow I ended up with a copy ;-)
>
> Tim
>
> At Thu, 9 Nov 2000 19:15:29 -0800, "Walter Sherwin" <wsherwin at home.com>
> wrote:
>
> >
> >Backfire when exactly.  During throttle opening or closing maneuver?
> > The
> >short burst of data below is a bit inconclusive.
> >
> >Walt.
> >
> >
> >
> >> Jason sent me an XLS spreadsheet with data from a scantool that shows
> >a
> >> backfire happening when he blips the throttle.  Car = 1987 Vette w/
> >MiniRam.
> >>  Its pretty interesting.  (Jason, I am posting here because I can't
> >find
> >> your e-mail, thirdgen appears to be down, and I also want to share
> >this
> >> info with others here).
> >>
> >> The data clearly shows Jason 'blipping' the throttle from off idle.
> > There
> >> are 4 data points on the throttle blip and you can clearly see the
> >O2
> >volts
> >> going from the switching behavior at idle (TPS=0.53V) to 0mV on a
> >Throttle
> >> blip.  The data is below.  This appears to be a fueling issue
(expecially
> >> when viewing the SA in relation to the throttle blip and LV8).  Its
> >undetermined
> >> as to whether or not it is a PROM fueling issue or a mechanical fueling
> >> issue.  What do you guys think?
> >>
> >> RPMs,TPS, O2, AFR, Knock, SA, LV8
> >> 875, 0.530, 836, 14.7, 0, 25.4, 57
> >> 875, 1.630, 712, 11.7, 0,13.8, 189
> >> 875, 3.310, 292, 11.7, 0,15.9, 177
> >> 1300, 2.94, 0, 11.8, 0, 28.2, 175
> >> 1725, 0.90, 13 ,14.7, 0, 45.5, 124
> >>
> >> Jason - quick question for you.  The MiniRam has ZERO provisions for
> >EGR.
> >>  What PROM are you running?  Are you running $6E code, $32B code?
> > Is your
> >> PROM image based off an original TPIS image or did you start with
> >the
> >stock
> >> image as a base?
> >>
> >> A separate issue is that IMHO, knock -should- be detected and isn't.
> >>
> >> Tim
> >
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