Part Throttle tuning for MAF (was MAF tables have a max of 255)

[timsiford at hushmail.com]

Mark,

That's what I was expecting to hear but was hoping that I wouldn't hear. 
 Thanks for the reply.  I really appreciate it!!

Tim

At Sun, 24 Sep 2000 12:56:18 -0700, romans at starstream.net (Romans, Mark) 
wrote:

>
>There is no BPW table for the 1989 6E calibration.   You will have to 
>go to
>the MAF tables at the gram/sec area where your BL is 118 and reduce
>the Grams/sec for that area by the same % that the BL is low.
>By increasing the GM/Sec in the under 20 grams/sec area of my calibration
>I have brought the BL from 150 at idle to 128.
>(Actually now it's in the 120-125 area.)
>Mark
>----- Original Message -----
>From: <timsiford at hushmail.com>
>To: <gmecm at diy-efi.org>
>Sent: Sunday, September 24, 2000 10:03 AM
>Subject: Part Throttle tuning for MAF (was MAF tables have a max of 
>255)
>
>
>> Hmmmm,
>>
>> How come the $32 and $32B code both have a BPW Fuel vs Load (g/sec) 
>and
>> the $6E does not?  Or, is it just that TunerCat shows the BPW table 
>in the
>> $32 and $32B but not in the $6E?
>>
>> The reason that I am asking is this....
>> With an '89 corvette TPI (heads/cam - 165, $6E), Diacom reports a 
>BLM of
>> 118 at 1500rpms with a load of 40 g/sec (diacom actually reports 4000 
>but
>> I assume they really mean 40?).  This is NOT at WOT.  I'd like to 
>be able
>> to modify the image so that the BLMs are close to 128 almost all of 
>the
>> time.  If I had a $32 or $32B I would adjust the BPW vs Load (g/sec).
>However,
>>  this table doesn't exist in the versions of the $6E calibration file 
>that
>> I have for BOTH TunerCat and the Demo GMEPRO.  Am I missing something
>here?
>>  How do you tune part throttle closed loop operation on MAF '89 code
>($6E)?
>>  Can anyone shed any light or help out here?  The speed density setups 
>are
>> a cinch.  But, there doesn't seem to be any documentation on the internet
>> or in the diy-efi archives on how to tune PART throttle on the MAF 
>code.
>>
>> ANY help is GREATLY appreciated.
>> Tim
>>
>>
>> At Sun, 24 Sep 2000 10:49:57 -0400, "JN" <jwn at sgi.net> wrote:
>>
>> >
>> >It can't be changed but from what I know it can be fooled.  Use the
>> >PE vs
>> >RPM table to add more fuel in the upper RPM's.  The MAF is used mainly
>> >from
>> >what I understand in closed loop non PE driving modes.
>> >
>> >Jason
>> >----- Original Message -----
>> >From: <timsiford at hushmail.com>
>> >To: <gmecm at diy-efi.org>
>> >Sent: Saturday, September 23, 2000 8:29 AM
>> >Subject: MAF tables have a max of 255
>> >
>> >
>> >> Quick question:
>> >> I know a fair amount about speed density setups (730) and am doing
>> >my best
>> >> to learn the MAF setups ($6E / 165).  Why is the maximum MAF value
>> >= 255
>> >> and can this be changed?
>> >>
>> >> Tim
>> >
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