MAF BLM based tuning

[Dave Zug]

I'll secont all bruce has said.  If you are going for 500+ HP and BOOST, do
not use the MAF, its a 'severe' mis-application of the hardware specially
when the MAP 'puters are available.

better get a good rear end.


----- Original Message -----
From: Bruce Plecan <nacelp at bright.net>
To: <gmecm at diy-efi.org>
Sent: Tuesday, July 18, 2000 6:04 PM
Subject: Re: MAF BLM based tuning


>
> >     With that being the case why would I want to trash the MAF in favor
of
> > MAP for my future forced induction application?
>
> ????
> As I said you run out of calibration.   Exagerated, it's like trying to
run
> a 6K rpm with the timing set at initial advance.  You can do it but but
> it'll be real hard to make the HP.
>
>  I know that upgrading from
> > a '870 to a '165 would increase my serial data rate but what would I
gain
> > from a '730?
>
> Going 730 means going MAP. and the 749 and 730s are the only 2 bar
> application redialy available ecms for a v-8.
>
>   Couldn't the MAF data be recalibrated with a prom to measure
> > greater airflow than it was intended to measure stock?
>
> Not, by any mere mortals.
>
>  I'm hoping for
> > 500-550hp and would like use the MAF computer in the short term.
>
> Best of luck, might read the archives, and form your own opinion, based on
> more opinions then just mine
> Grumpy
>
> >
> > Jim Brady
> > '87 Monte SS 383 TPI 6 speed
> >
> > >
> > > Er, hmm,
> > > and where is it said that that maf is a 255er?.
> > > The GN is, a 255er.
> > > The MAF doesn't stop the engine from making any HP at a specific
gm/sec,
> > > just your out of calibration when that happens, ie no more timing
> > > corrections or fuel corrections can be made.  Given the right combo,
you
> > can
> > > get 500 HP out of one, but that probably er could just as easily be
550.
> > > Grumpy
> > >
> > >
> > > > The MAF just barely touches 231 as the automatic shifts, so NO its
not
> > > > maxxed.  Now the LV8 rides at 255 except for a brief drop off just
> > before
> > > > the shifts, in a WOT run.  All the talk about maxing out the MAF and
> my
> > > > stroker motor ain't there yet, but the E.T. numbers show it's
pushing
> > 350
> > > > HP.  If what is really meant is that the LV8 will max out, well I
can
> > see
> > > > that.
> > > >
> > <snip
> > > > > Dave,
> > > > >     Are you outflowing the MAF yet?  How are you modifying your
> > > ECM/PROM?
> > > > > Do you think knocking you initial timing back could help your
> > knocking?
> > > > I'm
> > > > > running 87 octane w/9.3:1 compression (aluminum heads) with no
> knocks
> > so
> > > > > far.  What mods(if any more) do you have planned for the future?
> > > > >
> > > > > Jim Brady
> > > > > '87 Monte SS 383 TPI 6 speed
> > > >
> > > > <Snip>
> > > >
> > >
> >
>
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