Re: MAF BLM based tuning

["Jim and Sharon Brady" <bradyiii@shore.intercom.net>]

Dave,
    I was asking about maxing the MAF, good thing you're not.  What is LV8?
Forgive my ignorance since I'm still new to this.  Is GMEPRO a piggy back
pc?  I'd be interested in your notes of your tuning process.  I'd be
particularly interested in how you burn the PROMs and how you know how and
what to modify.  I'm using 24lb SVO injectors and so far so good.  Sure
beats the hell out of paying twice as much for GM injectors.  Here is the
lowdown on my car:  1990 4 bolt main Chevy Truck block, SCAT stroker crank
balanced both rotating and recipricating mass, 5.7 inch rods, Wiseco 9.3:1
comp forged pistons,  SLP cam #51006(approximately 270adv.dur.) roller cam,
Edelbrock Performer Aluminum heads with roller rockers and 24lb SVO
injectors w/fuel pressure regulator.  Did I leave anything out?  Oh, also my
6 speed is a Borg-Warner aftermarket unit.  The reason I went with somewhat
low compression with aluminum heads is that I plan to add a Paxton
Supercharger.  How is yours?  Do you still have it installed?  Keep me in
touch.

Jim Brady
'87 Monte SS 383 TPI 6 speed
>
> 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.
>
> How am I modifying the prom? or what am I doing to it?  How I am modifying
> it is with GMEPRO and a generic 27c128 burner. I started with ARAP as the
> base (even with the agressive timing in there, and 10:1 CR, all the
aluminum
> is forgiving to knock).  What am I doing to it? well eventually,
embarrasing
> as it may be, I'll maybe post the NOTES file (a handy function in GMEPRO)
> I'm keeping... thru 15 revisions so far. Some of the notes may be
misguided,
> but it's a history of how things went.  If by initial timing you mean
lower
> RPM/load timing.. the way a launch goes is like this: (in 0.1 sec
> intervals):
<snip>

>Tell me more about the Monte SS.
>
> Here's mine:
> www.delanet.com/~tgp  go to the 89 IROC page, then the 383 project link.
Not
> very up to date,  It ran a 13.14 @ 103 w/ 1.75 60' on 16" BFG Drags... the
> knock off the line is making the launch pedal-finesse un-nessecary..
almost
> like TRACTION CONTROL. I has run a few threads on EFI list and here on the
> subject of using spark table as a crude 'static' traction control method.
> Anyone who has stomped the gas pedal on a stock 305 TPI knows its
> frustrating to drop back 3 car lenghts while you try and feather off the
gas
> just the right amount.  The way the knock is working for me, I don't have
to
> think on launches... 1.75 60', not a misprint. you should see the jump I
get
> on the 'stangs ;-))
>
> sorry for the looong.. but EFI content this time anyway.
>
>
>
> ----- Original Message -----
> From: Jim and Sharon Brady <bradyiii@shore.intercom.net>
> To: <gmecm@diy-efi.org>
> Sent: Monday, July 17, 2000 1:49 PM
> Subject: Re: MAF BLM based tuning
>
>
> > 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
>


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