MAF BLM based tuning

[Dave Zug]

Thats okay, I saw your info in the archives, and I still have not twiddled
with it since its only cell zero thats a problem. Since I applied a factor
to the MAF tables based on gutting, the rest are dead on 128-130.

FYI, my project status (383 TPI L-98) in 89 IROC has run a 13.14 on the
stock lower intake and stock injectors, cycling at 12 ms max. Thats no large
accomplishment but its dialed in much better now.  Hint: (as if I was saying
something you did not know) dropping a set of headers in place of the stock
manifolds on that combo is worth a solid half sec, fun factor is approaching
Buick GN territory finally.

My latest problem involves "launch knock".. 12 degrees of it (my max
setting). I have taken lots of timing out of the 128-208(255 in other words)
LV8/ 1400-3600 RPM area (the area that during launch, gets passed thru and
normally is set up to 35 degrees) when the 383 can take about 16-18 at WOT.
The launch knock is still as severe. No knock occurs during a quarter mile
run using 93 octane (10:1 CR, alum heads, hypereu pistons, 0.200 deck).

I was considering disabling knock retard below like 25 MPH but I'd hate to
risk the hardware.

Other suggestions? no teflon please ;-)

PS, 89 ARAP '165 MAF Automatic.



----- Original Message -----
From: Romans, Mark <romans at starstream.net>
To: <gmecm at diy-efi.org>
Sent: Saturday, July 15, 2000 4:14 PM
Subject: Re: MAF BLM based tuning


> Hi Dave:  Sorry for the deafening silence!  I will send you a copy of my
bin
> if you want.  I adjusted the flows at low grams in the maf calibration, I
> have also adjusted (Widened) the Block learn cell parameters.  (Using 89
YB
> code)
> Mark
> ----- Original Message -----
> From: "Dave Zug" <dzug at delanet.com>
> To: <gmecm at esl.eng.ohio-state.edu>
> Sent: Tuesday, July 04, 2000 12:42 AM
> Subject: MAF BLM based tuning
>
>
> > (This is for MAF '165 ARAP... 383 app)
> > Given that the BLM cell seperators are 13,21,34 g/s, and 700,1200,2000
> > RPM...
> >
> > and as an example, say cells 6 and 10 show high values (160)  and the
rest
> > are fine (low 130's).
> >
> > Since I have no VE tables to speak of,  What would be a good first step
in
> > settling the bad BLM's back to normal, without affecting the rest of the
> > good BLM's?
> >
> >
> > Please respond without using the word "MAP"   ;-P
> >
> > Extra credit:  Anyone tried expanding or sliding the range that BLM's
> > affect?  like 13,27,40 and 700,1600,2800?
> >
>
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