[Gmecm] $58 simplification

[Dig]

KDISFS is never used in the code. F28 is the "common" means for scaling injectors.


Later,

Dig


----- Original Message ----
From: Rob Handley <Robin at FuryWorld.fsnet.co.uk>
To: gmecm at diy-efi.org
Sent: Monday, August 13, 2007 1:30:01 PM
Subject: Re: [Gmecm] $58 simplification

Hello Bill,

I had the following to zap EGR:

?         KEGRTEM1 ($0669) to maximum possible temperature ? to turn off EGR

?         Contents of F4 ($02FF) to 0 ? to turn off EGR effect

?         Contents of F72 ($06E5) to 0 ? to turn off EGR effect

?         Contents of F73 ($0739) to 0 ? to turn off EGR effect

?         F28 ($040E) to ? ? to turn off EGR effect

?         F75 ($06D1) to ? ? to turn off EGR effect



...and the following to zap DFCO:



?         KDFCOTP ($0388) to minimum possible throttle value ? to turn off 
DFCO

?         KDFCOSLK ($037B) to maximum possible speed ? to turn off DFCO

?         KDFCOG ($0373) to ? ? to turn off DFCO effect ??



Thanks for the tip about the 0 entry in the F28 array - but isn't KDISFS 
(injector flow rate in gallons/hour) not a good place to configure the BPW 
calculation for the injectors in use? (BTW Am I right in thinking that this 
is the rating of each of the 4 injectors, in the Sunbird application?)



Thanks,



Robin



----- Original Message ----- 
From: "Bill Shaw" <b.shaw at comcast.net>
To: <gmecm at diy-efi.org>
Sent: 13 August 2007 16:28
Subject: Re: [Gmecm] $58 simplification


> Hi Robin,
>
> To disable EGR I zeroed the F72 table,  Desired % vs vac & rpm.  I vaguely 
> remember one entry somewhere that could be zeroed to disable egr but it's 
> been a while since I messed with it.
>
> With no egr the only entry in F28 that is used is the 0 entry.  That is 
> basically your injector constant.
>
> To disable DFCO I set KDFCOPT, throttle threshold for decel fuel cutoff, 
> to 0.
>
> hth,
>
> Bill
>
>
> Rob Handley wrote:
>> I've spent the whole weekend trying to define a calibration that cuts 
>> down on the number of adjustments that code $58 makes in preparation for 
>> setting up base VE tables _from_scratch_.
>>
>> I've been adopting a 'belt and braces' approach where I set one or more 
>> thresholds to turn off a factor (e.g. EGR/DFCO) and all the values that 
>> the factor would apply if it was on - so that they would have no effect.
>>
>> There's a couple that I'm not clear on:
>>
>> - how to set the F28 and F75 arrays to make EGR have no effect
>> - how to set KDFCOG to make DFCO have no effect
>>
>> Can anybody help?
>>
>> Robin

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