MAF BLM based tuning

[Dave Zug.]

Hi Dan, I missed your message.

The motor runs perfectly cool. I have a trans cooler and dual factory fans.
I have removed the A/C condenser coil in front of the radiator and run a 180
stat.  I can make 1/4 mile passes and the return road drops the temp from
200 to 180 quickly. my runs show 0.89 - 0.87 o2 readings. my WOT areas in
the main spark table read 19, 19, 20,20, and 21 at the top rpm. My base
timing is 6 degrees. I still have stock values in my WOT spark adder table
but have seen the post where it is recommended to remove it, I think it
makes things simpler? In the mid rpm areas I've taken the 36 and 32's that
were in there and generally made them 23's.  i'm not finished with it yet so
showing my spark map may mis-direct you.

One thing, If you have a thirdgen camaro, be sure you have the black plastic
air dam installed below the radiator. Its no myth - if its missing, you'll
overheat on a 70 degreee day. the low pressure area it creates below the
engine at speeds pulls the air thru the radiator.

----- Original Message -----
From: Dan Plaskett <dynastydan at worldnet.att.net>
To: <gmecm at diy-efi.org>
Sent: Sunday, July 16, 2000 11:44 PM
Subject: Re: MAF BLM based tuning


> Hey Dave,
>
> My 406 TPI L-98 is doing the same thing except I even have the knock with
93
> octane.  I'm using the same ARAP as a base cal.  I've also got
hypereutectic
> pistons and I'm scared to get on it much at all for fear of shattering
those
> babies.  I definitely would not disconnect the KS.  I'd be interested to
see
> how much timing you've taken out and compare that with what I've done to
> this point trying to solve the knock problem.  Mine is much worse when it
> gets hot, but it gets hot fast.  I'm putting on an oil cooler and moving
to
> water wetter and RMI-25 like the GN boys run.  How hot is your motor
> running?
>
> Dan
> ----- Original Message -----
> From: "Dave Zug" <dzug at delanet.com>
> To: <gmecm at diy-efi.org>
> Sent: Monday, July 17, 2000 1:56 AM
> Subject: Re: MAF BLM based tuning
>
>
> > 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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> > >
> >
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