BLM cell boarder values

[turbo31 v6]

Dave Z wrote:
>I saw references in the SY PDF doc to variables that indicated that >to me, 
>but the SY doc talked about 2 states.. closed throttle and >not-closed 
>throttle.

Abolustly right, and tables sometimes greater than 2% TPS and less than 2% 
TPS and like you say, Closed and Not Closed Throttle (TPS position 
threshold?).


>I've been getting 20 MPG in my 383, Captain Clean... thanks to an >almost 
>stock 350 cal and a little fuel pressure tweak. BLM's at 160 >in the cruise 
>areas, o2 switching between 0.1 and 0.78 under cruise >65 mph) BLM's just 
>can't gat the o2 up to 14:1 due to being at its >limits with the BLM's so 
>the result is a fuel efficient 17:1 or >something.  prety neet how it 
>worked out but obviously not a good >cal to drag with. o2 is still 0.92 @ 
>WOT with stock injectors (22#) >due to the almost stock TPI intake stuff.  
>so CRUISE needs
>more fuel, but WOT is still fat.  Torq'y little motor but it drops >off at 
>4800.  I hear I need lots less timing at upper RPM areas for >a stroker, 
>and have advice that the low-rpm, high load areas need >almost ZERO timing 
>(plus base).

In that same P4 Doc it discusses (not easy reading on this stuff ;-) that AE 
and PE fueling gets based off (other things as well) the BPW at the time of 
activation.  So when you finally do lean back those crusie tables, the WOT 
fueling will also go leaner, you already know that BLM is carried over to 
open loop fuleing commands.  I don't know for sure about your cal but I also 
found that there is like an A/F clamp impossed at a certain coolant temp.  
As I watch the Diacom, I can see that at 47 degrees C, the A/F I have drops 
to 14.7 and the fueling (o2) changes a great deal as well, so for now I have 
raised this temp threshold to allow my base tuning to be more successful.  
The clamp, I call it, should be able to be found, another one of the 147 d = 
14.7 A/F so, if you can find (yea, there may be a couple) a sinlge hex value 
of 93, you could change this. it would not be a value in a table but a 
single loner. Does your Diacom shows that A/F drop at about 47 degrees C?.  
Sounds like this car will easily top your 13.89 in the old Turbo Grand Prix 
you used to have ;-).

Jesse (Jeff M ;-)


>thanks for the pointer.

>----- Original Message -----
>From: Ludis Langens <ludis at cruzers.com>
>To: <gmecm at diy-efi.org>
>Sent: Wednesday, April 19, 2000 1:48 AM
>Subject: Re: BLM cell boarder values
>
>
> > "Dave Zug." wrote:
> > >
> > > cell 15 is the highest load / LV8 obviosly, but what are the actual
> > > seperation numbers.. say between cell 6 and 7 for the same RPM?
> >
> > Drop your sails, Pirate Dave, prepare your BLMs for boarding, this is
> > the USS EPA!
> >
> > The cell borders are specified in your EPROM data area.  The ECMGuy
> > hacks should tell you where to find (and change) these constants.
> >
> > --
> > Ludis Langens                               ludis (at) cruzers (dot) com
> > Mac, Fiero, & engine controller goodies:  http://www.cruzers.com/~ludis/
> >
> > 
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