[Gmecm] Off idle stumble

[Mark Romans]

Well, there are several tables that are in effect your accellerator pump.
The superram also has a much larger plenum than stock ,so you need to give 
it evern
more pump shot.

There are six tables that I count that affect your accel pump shot.
Accel enrich Delta TPS Pulse Mult vs AE pulse
Accel enrich Delta TPS pulse mult vs coolant temp
Delta TPS accel enrich pulses vs coolant temp
Accl enrich delta LV8 factor vs delta LV8
Accel entich delta LV8 Mult vs coolant temp
TPS threshold to enable WOT

If I was having an off idle stumble I would start with
Accl enrich delta LV8 factor vs delta LV8" and add 20% to each of the 
settings.  This is where an emulator comes in handy, so you can always 
change it back and do so quickly!

Mark







----- Original Message ----- 
From: "Mike Poore" <mp at FlowersByValerie.com>
To: <Gmecm at diy-efi.org>
Sent: Friday, March 10, 2006 7:03 PM
Subject: Re: [Gmecm] Off idle stumble


> No, it is an '85 L98 MAF system. Someone else wanted to know about my 
> setup, so I'll go into some detail.
>
> It is an '85 vette. Right now the block is a 355, but will be replaced 
> with a 420 cid. I have the TPIS Mini Ram, a 58mm throttle body, handmade 
> MAF capable of 1100 cfm, handmade fresh air system, long tube headers, air 
> system removed, cats removed, no egr,  hand ported heads, Ford Racing 40# 
> injectors, 10:1 compression, Richmond ROD 6 speed transmission,  cap  dis 
> ignition with remote coil,  and numerous handmade bit and pieces to get 
> everything to fit. Everything is oversized for the 355, which is a bit of 
> a challenge, but I can't afford to get the 420 cid block right now. I 
> don't want to know what I have already spent not to mention the hours 
> invested.
>
> Mike
>
> Darryl M Gilbert wrote:
>
>>Are you using a MAP??
>>Darryl..
>>On Fri, 10 Mar 2006 20:21:09 -0500 Mike Poore <mp at FlowersByValerie.com>
>>writes:
>>
>>>I now have the BLM at idle between 126 and 128. My newest issue is that 
>>>since reducing the injector pulse width vs. LV8 by 20%  to get the BLM to 
>>>128 the engine has a hesitation off idle. I have a 58mm throttle
>>>body, which is a little big for the current configuration, but will be 
>>>perfect when I get the 420 cid built. For now, I need to make due with 
>>>what I have. I tried adjusting the following:
>>>
>>>Delta TPS Accel. Enrichment Pulses from 4 to 5
>>>Accel. Enrich. Delta TPS Scale Factor from 0 to 30%
>>>Accel. Enrich. Delta vs. Delta LV8 scaled up 20%
>>>
>>>Even with all three adjustments, the hesitation still exists. Any 
>>>suggestions?
>>>
>>>Mike
>>>_______________________________________________
>>>Gmecm mailing list
>>>Gmecm at diy-efi.org
>>>http://lists.diy-efi.org/mailman/listinfo/gmecm
>>>
>>>
>>>
>>
>>
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